diff --git a/.github/workflows/rust_ci.yaml b/.github/workflows/rust_ci.yaml
index 1a44426..e56f746 100644
--- a/.github/workflows/rust_ci.yaml
+++ b/.github/workflows/rust_ci.yaml
@@ -20,11 +20,15 @@ jobs:
       matrix:
         action:
           - command: build
-            args: --no-default-features --target=riscv32imc-unknown-none-elf --release
+            args: --no-default-features --features v3 --target=riscv32imc-unknown-none-elf --release
+          - command: build
+            args: --no-default-features --features v4 --target=riscv32imc-unknown-none-elf --release
           - command: fmt
             args: --all -- --check --color always
           - command: clippy
-            args: --no-default-features --target=riscv32imc-unknown-none-elf --workspace -- -D warnings
+            args: --no-default-features --features v3 --target=riscv32imc-unknown-none-elf --workspace -- -D warnings
+          - command: clippy
+            args: --no-default-features --features v4 --target=riscv32imc-unknown-none-elf --workspace -- -D warnings
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
diff --git a/Cargo.lock b/Cargo.lock
index 0decc63..defaba9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "adler2"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
+
 [[package]]
 name = "adv-shift-registers"
 version = "0.2.5"
@@ -56,6 +62,36 @@ dependencies = [
  "embedded-hal-async",
 ]
 
+[[package]]
+name = "ahash"
+version = "0.8.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a15f179cd60c4584b8a8c596927aadc462e27f2ca70c04e0071964a73ba7a75"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "version_check",
+ "zerocopy",
+]
+
+[[package]]
+name = "aligned"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee4508988c62edf04abd8d92897fca0c2995d907ce1dfeaf369dac3716a40685"
+dependencies = [
+ "as-slice 0.2.1",
+]
+
+[[package]]
+name = "aligned-vec"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc890384c8602f339876ded803c97ad529f3842aba97f6392b3dba0dd171769b"
+dependencies = [
+ "equator",
+]
+
 [[package]]
 name = "allocator-api2"
 version = "0.3.1"
@@ -68,6 +104,35 @@ version = "1.0.102"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f202df86484c868dbad7eaa557ef785d5c66295e41b460ef922eca0723b842c"
 
+[[package]]
+name = "arbitrary"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3d036a3c4ab069c7b410a2ce876bd74808d2d0888a82667669f8e783a898bf1"
+
+[[package]]
+name = "arg_enum_proc_macro"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ae92a5119aa49cdbcf6b9f893fe4e1d98b04ccbf82ee0584ad948a44a734dea"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
+[[package]]
+name = "arraydeque"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d902e3d592a523def97af8f317b08ce16b7ab854c1985a0c671e6f15cebc236"
+
+[[package]]
+name = "arrayvec"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7c02d123df017efcdfbd739ef81735b36c5ba83ec3c59c80a9d7ecc718f92e50"
+
 [[package]]
 name = "as-slice"
 version = "0.1.5"
@@ -80,12 +145,107 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "as-slice"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "516b6b4f0e40d50dcda9365d53964ec74560ad4284da2e7fc97122cd83174516"
+dependencies = [
+ "stable_deref_trait",
+]
+
+[[package]]
+name = "askama"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f75363874b771be265f4ffe307ca705ef6f3baa19011c149da8674a87f1b75c4"
+dependencies = [
+ "askama_derive",
+ "itoa",
+ "percent-encoding",
+ "serde",
+ "serde_json",
+]
+
+[[package]]
+name = "askama_derive"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "129397200fe83088e8a68407a8e2b1f826cf0086b21ccdb866a722c8bcd3a94f"
+dependencies = [
+ "askama_parser",
+ "memchr",
+ "proc-macro2",
+ "quote",
+ "rustc-hash",
+ "syn 2.0.117",
+]
+
+[[package]]
+name = "askama_parser"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d6ab5630b3d5eaf232620167977f95eb51f3432fc76852328774afbd242d4358"
+dependencies = [
+ "memchr",
+ "winnow",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
 
+[[package]]
+name = "av-scenechange"
+version = "0.14.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f321d77c20e19b92c39e7471cf986812cbb46659d2af674adc4331ef3f18394"
+dependencies = [
+ "aligned",
+ "anyhow",
+ "arg_enum_proc_macro",
+ "arrayvec",
+ "log",
+ "num-rational",
+ "num-traits",
+ "pastey",
+ "rayon",
+ "thiserror",
+ "v_frame",
+ "y4m",
+]
+
+[[package]]
+name = "av1-grain"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8cfddb07216410377231960af4fcab838eaa12e013417781b78bd95ee22077f8"
+dependencies = [
+ "anyhow",
+ "arrayvec",
+ "log",
+ "nom",
+ "num-rational",
+ "v_frame",
+]
+
+[[package]]
+name = "avif-serialize"
+version = "0.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "375082f007bd67184fb9c0374614b29f9aaa604ec301635f72338bb65386a53d"
+dependencies = [
+ "arrayvec",
+]
+
+[[package]]
+name = "az"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b7e4c2464d97fe331d41de9d5db0def0a96f4d823b8b32a2efd503578988973"
+
 [[package]]
 name = "base16ct"
 version = "0.2.0"
@@ -98,6 +258,12 @@ version = "0.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
 
+[[package]]
+name = "bit_field"
+version = "0.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e4b40c7323adcfc0a41c4b88143ed58346ff65a288fc144329c5c45e05d70c6"
+
 [[package]]
 name = "bitfield"
 version = "0.19.4"
@@ -130,6 +296,27 @@ version = "2.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "843867be96c8daad0d758b57df9392b6d8d271134fce549de6ce169ff98a92af"
 
+[[package]]
+name = "bitstream-io"
+version = "4.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60d4bd9d1db2c6bdf285e223a7fa369d5ce98ec767dec949c6ca62863ce61757"
+dependencies = [
+ "core2",
+]
+
+[[package]]
+name = "bitvec"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1bc2832c24239b0141d5674bb9174f9d68a8b5b3f2753311927c172ca46f7e9c"
+dependencies = [
+ "funty",
+ "radium",
+ "tap",
+ "wyz",
+]
+
 [[package]]
 name = "block-buffer"
 version = "0.10.4"
@@ -139,6 +326,22 @@ dependencies = [
  "generic-array 0.14.7",
 ]
 
+[[package]]
+name = "bq27441"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "401a2308f1e83ceaaa9345f409759ac6e891259a4d909da8fb7332321ae428a4"
+dependencies = [
+ "defmt 0.3.100",
+ "device-driver",
+ "device-driver-generation",
+ "embedded-hal 1.0.0",
+ "embedded-hal-async",
+ "prettyplease",
+ "proc-macro2",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "bt-hci"
 version = "0.6.0"
@@ -162,6 +365,18 @@ dependencies = [
  "uuid",
 ]
 
+[[package]]
+name = "built"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f4ad8f11f288f48ca24471bbd51ac257aaeaaa07adae295591266b792902ae64"
+
+[[package]]
+name = "bumpalo"
+version = "3.20.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d20789868f4b01b2f2caec9f5c4e0213b41e3e5702a50157d699ae31ced2fcb"
+
 [[package]]
 name = "bytemuck"
 version = "1.25.0"
@@ -174,6 +389,24 @@ version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
 
+[[package]]
+name = "byteorder-lite"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f1fe948ff07f4bd06c30984e69f5b4899c516a3ef74f34df92a2df2ab535495"
+
+[[package]]
+name = "cc"
+version = "1.2.56"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aebf35691d1bfb0ac386a69bac2fde4dd276fb618cf8bf4f5318fe285e821bb2"
+dependencies = [
+ "find-msvc-tools",
+ "jobserver",
+ "libc",
+ "shlex",
+]
+
 [[package]]
 name = "cfg-if"
 version = "1.0.4"
@@ -201,6 +434,12 @@ dependencies = [
  "digest",
 ]
 
+[[package]]
+name = "color_quant"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d7b894f5411737b7867f4827955924d7c254fc9f4d91a6aad6b097804b1018b"
+
 [[package]]
 name = "const-default"
 version = "1.0.0"
@@ -213,6 +452,15 @@ version = "0.9.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2459377285ad874054d797f3ccebf984978aa39129f6eafde5cdc8315b612f8"
 
+[[package]]
+name = "convert_case"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec182b0ca2f35d8fc196cf3404988fd8b8c739a4d270ff118a398feb0cbec1ca"
+dependencies = [
+ "unicode-segmentation",
+]
+
 [[package]]
 name = "convert_case"
 version = "0.8.0"
@@ -222,6 +470,24 @@ dependencies = [
  "unicode-segmentation",
 ]
 
+[[package]]
+name = "convert_case"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "affbf0190ed2caf063e3def54ff444b449371d55c58e513a95ab98eca50adb49"
+dependencies = [
+ "unicode-segmentation",
+]
+
+[[package]]
+name = "core2"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b49ba7ef1ad6107f8824dbe97de947cbaac53c44e7f9756a1fba0d37c1eec505"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "cpufeatures"
 version = "0.2.17"
@@ -231,12 +497,52 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "crc32fast"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9481c1c90cbf2ac953f07c8d4a58aa3945c425b7185c9154d67a65e4230da511"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "critical-section"
 version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "790eea4361631c5e7d22598ecd5723ff611904e3344ce8720784c93e3d83d40b"
 
+[[package]]
+name = "crossbeam-deque"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9dd111b7b7f7d55b72c0a6ae361660ee5853c9af73f70c3c2ef6858b950e2e51"
+dependencies = [
+ "crossbeam-epoch",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.9.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
+dependencies = [
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.8.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
+
+[[package]]
+name = "crunchy"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "460fbee9c2c2f33933d720630a6a0bac33ba7053db5344fac858d4b8952d77d5"
+
 [[package]]
 name = "crypto-bigint"
 version = "0.5.5"
@@ -380,6 +686,58 @@ dependencies = [
  "generic-array 0.14.7",
 ]
 
+[[package]]
+name = "dd-manifest-tree"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5793572036e0a6638977c7370c6afc423eac848ee8495f079b8fd3964de7b9f9"
+dependencies = [
+ "serde_json",
+ "toml",
+ "yaml-rust2",
+]
+
+[[package]]
+name = "defmt"
+version = "0.3.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0963443817029b2024136fc4dd07a5107eb8f977eaf18fcd1fdeb11306b64ad"
+dependencies = [
+ "defmt 1.0.1",
+]
+
+[[package]]
+name = "defmt"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "548d977b6da32fa1d1fda2876453da1e7df63ad0304c8b3dae4dbe7b96f39b78"
+dependencies = [
+ "bitflags 1.3.2",
+ "defmt-macros",
+]
+
+[[package]]
+name = "defmt-macros"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d4fc12a85bcf441cfe44344c4b72d58493178ce635338a3f3b78943aceb258e"
+dependencies = [
+ "defmt-parser",
+ "proc-macro-error2",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
+[[package]]
+name = "defmt-parser"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10d60334b3b2e7c9d91ef8150abfb6fa4c1c39ebbcf4a81c2e346aad939fee3e"
+dependencies = [
+ "thiserror",
+]
+
 [[package]]
 name = "delegate"
 version = "0.13.5"
@@ -401,6 +759,47 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "device-driver"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3aa3d97b2acf349b9d52c75470e2ccfc7224c49597ec12c2fb0e28826e910495"
+dependencies = [
+ "defmt 0.3.100",
+ "device-driver-macros",
+ "embedded-io 0.6.1",
+ "embedded-io-async 0.6.1",
+]
+
+[[package]]
+name = "device-driver-generation"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d23ac9a75e0bba43928e1a50c7b1beaaa67a98b64eaa28f353a16de1a5fd985"
+dependencies = [
+ "anyhow",
+ "askama",
+ "bitvec",
+ "convert_case 0.6.0",
+ "dd-manifest-tree",
+ "itertools 0.14.0",
+ "prettyplease",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
+[[package]]
+name = "device-driver-macros"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dec62c8588239d60d7470326cd78ba2b264bef24f0afa20c666668487c843d03"
+dependencies = [
+ "device-driver-generation",
+ "proc-macro2",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -413,6 +812,23 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "display-interface"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ba2aab1ef3793e6f7804162debb5ac5edb93b3d650fbcc5aeb72fcd0e6c03a0"
+
+[[package]]
+name = "display-interface-i2c"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0d964fa85bbbb5a6ecd06e58699407ac5dc3e3ad72dac0ab7e6b0d00a1cd262d"
+dependencies = [
+ "display-interface",
+ "embedded-hal 1.0.0",
+ "embedded-hal-async",
+]
+
 [[package]]
 name = "dns-protocol"
 version = "0.1.2"
@@ -650,9 +1066,51 @@ dependencies = [
 name = "embedded-can"
 version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e9d2e857f87ac832df68fa498d18ddc679175cf3d2e4aa893988e5601baf9438"
+checksum = "e9d2e857f87ac832df68fa498d18ddc679175cf3d2e4aa893988e5601baf9438"
+dependencies = [
+ "nb 1.1.0",
+]
+
+[[package]]
+name = "embedded-dma"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "994f7e5b5cb23521c22304927195f236813053eb9c065dd2226a32ba64695446"
+dependencies = [
+ "stable_deref_trait",
+]
+
+[[package]]
+name = "embedded-graphics"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4e8da660bb0c829b34a56a965490597f82a55e767b91f9543be80ce8ccb416fe"
+dependencies = [
+ "az",
+ "byteorder",
+ "embedded-graphics-core",
+ "float-cmp",
+ "micromath",
+]
+
+[[package]]
+name = "embedded-graphics-core"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "95743bef3ff70fcba3930246c4e6872882bbea0dcc6da2ca860112e0cd4bd09f"
+dependencies = [
+ "az",
+ "byteorder",
+]
+
+[[package]]
+name = "embedded-graphics-framebuf"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22354420f68727fa24d1e2741dae1e9a041065e80fb63b35a8d19c647a85be76"
 dependencies = [
- "nb 1.1.0",
+ "embedded-dma",
+ "embedded-graphics",
 ]
 
 [[package]]
@@ -696,6 +1154,9 @@ name = "embedded-io"
 version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "edd0f118536f44f5ccd48bcb8b111bdc3de888b58c74639dfb034a357d0f206d"
+dependencies = [
+ "defmt 0.3.100",
+]
 
 [[package]]
 name = "embedded-io"
@@ -730,6 +1191,27 @@ dependencies = [
  "embedded-io 0.7.1",
 ]
 
+[[package]]
+name = "embedded-layout"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a90553247f2b05c59ac7894ea13d830636c2b1203fa03bff400eddbd1fa9f52"
+dependencies = [
+ "embedded-graphics",
+ "embedded-layout-macros",
+]
+
+[[package]]
+name = "embedded-layout-macros"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4f6e621fe4c7e05b695274b722dc0a60bacd1c8696b58191baa0154713d52400"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "embedded-nal"
 version = "0.9.0"
@@ -764,6 +1246,17 @@ dependencies = [
  "embedded-storage",
 ]
 
+[[package]]
+name = "embedded-text"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6cf5c72c52db2f7dbe4a9c1ed81cd21301e8d66311b194fa41c04fb4f71843ba"
+dependencies = [
+ "az",
+ "embedded-graphics",
+ "object-chain",
+]
+
 [[package]]
 name = "embedded-tls"
 version = "0.19.0"
@@ -789,6 +1282,15 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "encoding_rs"
+version = "0.8.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "75030f3c4f45dafd7586dd6780965a8c7e8e285a5ecb86713e63a79c5b2766f3"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "enumset"
 version = "1.1.10"
@@ -810,6 +1312,26 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "equator"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4711b213838dfee0117e3be6ac926007d7f433d7bbe33595975d4190cb07e6fc"
+dependencies = [
+ "equator-macro",
+]
+
+[[package]]
+name = "equator-macro"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44f23cf4b44bfce11a86ace86f8a73ffdec849c9fd00a386a53d278bd9e81fb3"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "equivalent"
 version = "1.0.2"
@@ -1014,7 +1536,7 @@ dependencies = [
  "esp-radio",
  "esp-rtos",
  "esp-storage",
- "getrandom",
+ "getrandom 0.2.15",
  "heapless 0.8.0",
  "heapless 0.9.2",
  "log",
@@ -1265,6 +1787,50 @@ dependencies = [
  "vcell",
 ]
 
+[[package]]
+name = "exr"
+version = "1.74.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4300e043a56aa2cb633c01af81ca8f699a321879a7854d3896a0ba89056363be"
+dependencies = [
+ "bit_field",
+ "half",
+ "lebe",
+ "miniz_oxide",
+ "rayon-core",
+ "smallvec",
+ "zune-inflate",
+]
+
+[[package]]
+name = "fax"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f05de7d48f37cd6730705cbca900770cab77a89f413d23e100ad7fad7795a0ab"
+dependencies = [
+ "fax_derive",
+]
+
+[[package]]
+name = "fax_derive"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a0aca10fb742cb43f9e7bb8467c91aa9bcb8e3ffbc6a6f7389bb93ffc920577d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
+[[package]]
+name = "fdeflate"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e6853b52649d4ac5c0bd02320cddc5ba956bdb407c4b75a2c6b75bf51500f8c"
+dependencies = [
+ "simd-adler32",
+]
+
 [[package]]
 name = "ff"
 version = "0.13.1"
@@ -1275,6 +1841,12 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "find-msvc-tools"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"
+
 [[package]]
 name = "fkm-firmware"
 version = "0.1.0"
@@ -1282,7 +1854,10 @@ dependencies = [
  "adv-shift-registers",
  "ag-lcd-async",
  "anyhow",
+ "bq27441",
  "critical-section",
+ "display-interface",
+ "display-interface-i2c",
  "dotenvy",
  "dyn-smooth",
  "embassy-executor",
@@ -1290,11 +1865,15 @@ dependencies = [
  "embassy-net",
  "embassy-sync 0.7.2",
  "embassy-time",
+ "embedded-graphics",
+ "embedded-graphics-framebuf",
  "embedded-hal 1.0.0",
  "embedded-hal-async",
  "embedded-hal-bus",
  "embedded-io-async 0.7.0",
+ "embedded-layout",
  "embedded-storage",
+ "embedded-text",
  "embedded-tls",
  "esp-alloc",
  "esp-backtrace",
@@ -1309,12 +1888,14 @@ dependencies = [
  "esp-rtos",
  "esp-storage",
  "esp32c3",
- "getrandom",
+ "getrandom 0.2.15",
  "heapless 0.9.2",
  "log",
  "macros",
  "nb 1.1.0",
+ "oled_async",
  "portable-atomic",
+ "profont",
  "rand_core 0.6.4",
  "serde",
  "serde_json",
@@ -1324,6 +1905,25 @@ dependencies = [
  "ws-framer",
 ]
 
+[[package]]
+name = "flate2"
+version = "1.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "843fba2746e448b37e26a819579957415c8cef339bf08564fe8b7ddbd959573c"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide",
+]
+
+[[package]]
+name = "float-cmp"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "98de4bbd547a563b716d8dfa9aad1cb19bfab00f4fa09a6a4ed21dbcf44ce9c4"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -1339,6 +1939,12 @@ dependencies = [
  "gcd",
 ]
 
+[[package]]
+name = "funty"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6d5a32815ae3f33302d95fdcb2ce17862f8c65363dcfd29360480ba1001fc9c"
+
 [[package]]
 name = "futures"
 version = "0.3.32"
@@ -1455,6 +2061,18 @@ dependencies = [
  "wasi",
 ]
 
+[[package]]
+name = "getrandom"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "899def5c37c4fd7b2664648c28120ecec138e4d395b459e5ca34f9cce2dd77fd"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "r-efi",
+ "wasip2",
+]
+
 [[package]]
 name = "ghash"
 version = "0.5.1"
@@ -1465,6 +2083,16 @@ dependencies = [
  "polyval",
 ]
 
+[[package]]
+name = "gif"
+version = "0.14.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f5df2ba84018d80c213569363bdcd0c64e6933c67fe4c1d60ecf822971a3c35e"
+dependencies = [
+ "color_quant",
+ "weezl",
+]
+
 [[package]]
 name = "group"
 version = "0.13.0"
@@ -1476,6 +2104,17 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "half"
+version = "2.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ea2d84b969582b4b1864a92dc5d27cd2b77b622a8d79306834f1be5ba20d84b"
+dependencies = [
+ "cfg-if",
+ "crunchy",
+ "zerocopy",
+]
+
 [[package]]
 name = "hash32"
 version = "0.1.1"
@@ -1494,19 +2133,37 @@ dependencies = [
  "byteorder",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.14.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
+dependencies = [
+ "ahash",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
 
+[[package]]
+name = "hashlink"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ba4ff7128dee98c7dc9794b6a411377e1404dba1c97deb8d1a55297bd25d8af"
+dependencies = [
+ "hashbrown 0.14.5",
+]
+
 [[package]]
 name = "heapless"
 version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "634bd4d29cbf24424d0a4bfcbf80c6960129dc24424752a7d1d1390607023422"
 dependencies = [
- "as-slice",
+ "as-slice 0.1.5",
  "generic-array 0.14.7",
  "hash32 0.1.1",
  "stable_deref_trait",
@@ -1568,6 +2225,46 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
 
+[[package]]
+name = "image"
+version = "0.25.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85ab80394333c02fe689eaf900ab500fbd0c2213da414687ebf995a65d5a6104"
+dependencies = [
+ "bytemuck",
+ "byteorder-lite",
+ "color_quant",
+ "exr",
+ "gif",
+ "image-webp",
+ "moxcms",
+ "num-traits",
+ "png",
+ "qoi",
+ "ravif",
+ "rayon",
+ "rgb",
+ "tiff",
+ "zune-core",
+ "zune-jpeg",
+]
+
+[[package]]
+name = "image-webp"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "525e9ff3e1a4be2fbea1fdf0e98686a6d98b4d8f937e1bf7402245af1909e8c3"
+dependencies = [
+ "byteorder-lite",
+ "quick-error",
+]
+
+[[package]]
+name = "imgref"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7c5cedc30da3a610cac6b4ba17597bdf7152cf974e8aab3afb3d54455e371c8"
+
 [[package]]
 name = "indexmap"
 version = "2.13.0"
@@ -1575,7 +2272,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7714e70437a7dc3ac8eb7e6f8df75fd8eb422675fc7678aff7364301092b1017"
 dependencies = [
  "equivalent",
- "hashbrown",
+ "hashbrown 0.16.1",
 ]
 
 [[package]]
@@ -1609,6 +2306,17 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "interpolate_name"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c34819042dc3d3971c46c2190835914dfbe0c3c13f61449b2997f4e9722dfa60"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "itertools"
 version = "0.13.0"
@@ -1618,6 +2326,15 @@ dependencies = [
  "either",
 ]
 
+[[package]]
+name = "itertools"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b192c782037fadd9cfa75548310488aabdbf3d2da73885b31bd0abd03351285"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.17"
@@ -1648,12 +2365,38 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "jobserver"
+version = "0.1.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9afb3de4395d6b3e67a780b6de64b51c978ecf11cb9a462c66be7d4ca9039d33"
+dependencies = [
+ "getrandom 0.3.4",
+ "libc",
+]
+
+[[package]]
+name = "lebe"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a79a3332a6609480d7d0c9eab957bca6b455b91bb84e66d19f5ff66294b85b8"
+
 [[package]]
 name = "libc"
 version = "0.2.182"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6800badb6cb2082ffd7b6a67e6125bb39f18782f793520caee8cb8846be06112"
 
+[[package]]
+name = "libfuzzer-sys"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f12a681b7dd8ce12bff52488013ba614b869148d54dd79836ab85aafdd53f08d"
+dependencies = [
+ "arbitrary",
+ "cc",
+]
+
 [[package]]
 name = "linked_list_allocator"
 version = "0.10.5"
@@ -1681,11 +2424,22 @@ version = "0.4.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
 
+[[package]]
+name = "loop9"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fae87c125b03c1d2c0150c90365d7d6bcc53fb73a9acaef207d2d065860f062"
+dependencies = [
+ "imgref",
+]
+
 [[package]]
 name = "macros"
 version = "0.1.0"
 dependencies = [
- "convert_case",
+ "anyhow",
+ "convert_case 0.11.0",
+ "image",
  "proc-macro2",
  "quote",
  "serde",
@@ -1699,12 +2453,48 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ca88d725a0a943b096803bd34e73a4437208b6077654cc4ecb2947a5f91618d"
 
+[[package]]
+name = "maybe-rayon"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ea1f30cedd69f0a2954655f7188c6a834246d2bcf1e315e2ac40c4b24dc9519"
+dependencies = [
+ "cfg-if",
+ "rayon",
+]
+
 [[package]]
 name = "memchr"
 version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
 
+[[package]]
+name = "micromath"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3c8dda44ff03a2f238717214da50f65d5a53b45cd213a7370424ffdb6fae815"
+
+[[package]]
+name = "miniz_oxide"
+version = "0.8.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fa76a2c86f704bdb222d66965fb3d63269ce38518b83cb0575fca855ebb6316"
+dependencies = [
+ "adler2",
+ "simd-adler32",
+]
+
+[[package]]
+name = "moxcms"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb85c154ba489f01b25c0d36ae69a87e4a1c73a72631fc6c0eb6dde34a73e44b"
+dependencies = [
+ "num-traits",
+ "pxfm",
+]
+
 [[package]]
 name = "nb"
 version = "0.1.3"
@@ -1720,6 +2510,37 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8d5439c4ad607c3c23abf66de8c8bf57ba8adcd1f129e699851a6e43935d339d"
 
+[[package]]
+name = "new_debug_unreachable"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "650eef8c711430f1a879fdd01d4745a7deea475becfb90269c06775983bbf086"
+
+[[package]]
+name = "nom"
+version = "8.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df9761775871bdef83bee530e60050f7e54b1105350d6884eb0fb4f46c2f9405"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "noop_proc_macro"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0676bb32a98c1a483ce53e500a81ad9c3d5b3f7c920c28c24e9cb0980d0b5bc8"
+
+[[package]]
+name = "num-bigint"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a5e44f723f1133c9deac646763579fdb3ac745e418f2a7af9cd0c431da1f20b9"
+dependencies = [
+ "num-integer",
+ "num-traits",
+]
+
 [[package]]
 name = "num-derive"
 version = "0.4.2"
@@ -1731,6 +2552,26 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "num-integer"
+version = "0.1.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7969661fd2958a5cb096e56c8e1ad0444ac2bbcd0061bd28660485a44879858f"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "num-rational"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f83d14da390562dca69fc84082e73e548e1ad308d24accdedd2720017cb37824"
+dependencies = [
+ "num-bigint",
+ "num-integer",
+ "num-traits",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.19"
@@ -1761,6 +2602,30 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "object-chain"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41af26158b0f5530f7b79955006c2727cd23d0d8e7c3109dc316db0a919784dd"
+
+[[package]]
+name = "oled_async"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "66a1a30da0097d4c0e9d7ba0757d62f2db86df3254f59d1e15c3988eb0bb24c4"
+dependencies = [
+ "defmt 0.3.100",
+ "display-interface",
+ "embedded-graphics-core",
+ "embedded-hal 1.0.0",
+]
+
+[[package]]
+name = "once_cell"
+version = "1.21.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
+
 [[package]]
 name = "opaque-debug"
 version = "0.3.1"
@@ -1785,11 +2650,36 @@ version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "57c0d7b74b563b49d38dae00a0c37d4d6de9b432382b2892f0574ddcae73fd0a"
 
+[[package]]
+name = "pastey"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35fb2e5f958ec131621fdd531e9fc186ed768cbe395337403ae56c17a74c68ec"
+
+[[package]]
+name = "percent-encoding"
+version = "2.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
+
 [[package]]
 name = "pin-project-lite"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b3cff922bd51709b605d9ead9aa71031d81447142d828eb4a6eba76fe619f9b"
+checksum = "3b3cff922bd51709b605d9ead9aa71031d81447142d828eb4a6eba76fe619f9b"
+
+[[package]]
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+checksum = "60769b8b31b2a9f263dae2776c37b1b28ae246943cf719eb6946a1db05128a61"
+dependencies = [
+ "bitflags 2.11.0",
+ "crc32fast",
+ "fdeflate",
+ "flate2",
+ "miniz_oxide",
+]
 
 [[package]]
 name = "polyval"
@@ -1848,6 +2738,16 @@ dependencies = [
  "zerocopy",
 ]
 
+[[package]]
+name = "prettyplease"
+version = "0.2.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "479ca8adacdd7ce8f1fb39ce9ecccbfe93a3f1344b3d0d97f20bc0196208f62b"
+dependencies = [
+ "proc-macro2",
+ "syn 2.0.117",
+]
+
 [[package]]
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 version = "0.13.6"
@@ -1863,7 +2763,29 @@ version = "3.4.0"
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 checksum = "219cb19e96be00ab2e37d6e299658a0cfa83e52429179969b0f0121b4ac46983"
 dependencies = [
- "toml_edit",
+ "toml_edit 0.23.10+spec-1.0.0",
+]
+
+[[package]]
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+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96de42df36bb9bba5542fe9f1a054b8cc87e172759a1868aa05c1f3acc89dfc5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "11ec05c52be0a07b08061f7dd003e7d7092e0472bc731b4af7bb1ef876109802"
+dependencies = [
+ "proc-macro-error-attr2",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -1875,15 +2797,76 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "profiling"
+version = "1.0.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3eb8486b569e12e2c32ad3e204dbaba5e4b5b216e9367044f25f1dba42341773"
+dependencies = [
+ "profiling-procmacros",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52717f9a02b6965224f95ca2a81e2e0c5c43baacd28ca057577988930b6c3d5b"
+dependencies = [
+ "quote",
+ "syn 2.0.117",
+]
+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "016681370a9dd6e7ddb4c1a959922fd59dc45e5ebaa5ff5b13090267898ced34"
+dependencies = [
+ "embedded-graphics",
+]
+
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+
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+dependencies = [
+ "bytemuck",
+]
+
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+
 [[package]]
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-version = "1.0.44"
+version = "1.0.45"
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-checksum = "21b2ebcf727b7760c461f091f9f0f539b77b8e87f2fd88131e7f1b433b3cece4"
+checksum = "41f2619966050689382d2b44f664f4bc593e129785a36d6ee376ddf37259b924"
 dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
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+version = "5.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc33ff2d4973d518d823d61aa239014831e521c75da58e3df4840d3f47749d09"
+
 [[package]]
 name = "rand"
 version = "0.8.5"
@@ -1893,6 +2876,16 @@ dependencies = [
  "rand_core 0.6.4",
 ]
 
+[[package]]
+name = "rand"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6db2770f06117d490610c7488547d543617b21bfa07796d7a12f6f1bd53850d1"
+dependencies = [
+ "rand_chacha 0.9.0",
+ "rand_core 0.9.5",
+]
+
 [[package]]
 name = "rand_chacha"
 version = "0.3.1"
@@ -1903,13 +2896,23 @@ dependencies = [
  "rand_core 0.6.4",
 ]
 
+[[package]]
+name = "rand_chacha"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.9.5",
+]
+
 [[package]]
 name = "rand_core"
 version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
 dependencies = [
- "getrandom",
+ "getrandom 0.2.15",
 ]
 
 [[package]]
@@ -1917,6 +2920,79 @@ name = "rand_core"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "76afc826de14238e6e8c374ddcc1fa19e374fd8dd986b0d2af0d02377261d83c"
+dependencies = [
+ "getrandom 0.3.4",
+]
+
+[[package]]
+name = "rav1e"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43b6dd56e85d9483277cde964fd1bdb0428de4fec5ebba7540995639a21cb32b"
+dependencies = [
+ "aligned-vec",
+ "arbitrary",
+ "arg_enum_proc_macro",
+ "arrayvec",
+ "av-scenechange",
+ "av1-grain",
+ "bitstream-io",
+ "built",
+ "cfg-if",
+ "interpolate_name",
+ "itertools 0.14.0",
+ "libc",
+ "libfuzzer-sys",
+ "log",
+ "maybe-rayon",
+ "new_debug_unreachable",
+ "noop_proc_macro",
+ "num-derive",
+ "num-traits",
+ "paste",
+ "profiling",
+ "rand 0.9.2",
+ "rand_chacha 0.9.0",
+ "simd_helpers",
+ "thiserror",
+ "v_frame",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "ravif"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e52310197d971b0f5be7fe6b57530dcd27beb35c1b013f29d66c1ad73fbbcc45"
+dependencies = [
+ "avif-serialize",
+ "imgref",
+ "loop9",
+ "quick-error",
+ "rav1e",
+ "rayon",
+ "rgb",
+]
+
+[[package]]
+name = "rayon"
+version = "1.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "368f01d005bf8fd9b1206fb6fa653e6c4a81ceb1466406b81792d87c5677a58f"
+dependencies = [
+ "either",
+ "rayon-core",
+]
+
+[[package]]
+name = "rayon-core"
+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22e18b0f0062d30d4230b2e85ff77fdfe4326feb054b9783a3460d8435c8ab91"
+dependencies = [
+ "crossbeam-deque",
+ "crossbeam-utils",
+]
 
 [[package]]
 name = "rfc6979"
@@ -1928,6 +3004,12 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "rgb"
+version = "0.8.53"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "47b34b781b31e5d73e9fbc8689c70551fd1ade9a19e3e28cfec8580a79290cc4"
+
 [[package]]
 name = "riscv"
 version = "0.15.0"
@@ -2000,6 +3082,12 @@ dependencies = [
  "svgbobdoc",
 ]
 
+[[package]]
+name = "rustc-hash"
+version = "2.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "357703d41365b4b27c590e3ed91eabb1b663f07c4c084095e60cbed4362dff0d"
+
 [[package]]
 name = "rustversion"
 version = "1.0.22"
@@ -2067,6 +3155,7 @@ version = "1.0.149"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86"
 dependencies = [
+ "indexmap",
  "itoa",
  "memchr",
  "serde",
@@ -2074,6 +3163,15 @@ dependencies = [
  "zmij",
 ]
 
+[[package]]
+name = "serde_spanned"
+version = "0.6.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf41e0cfaf7226dca15e8197172c295a782857fcb97fad1808a166870dee75a3"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "serde_yaml"
 version = "0.9.34+deprecated"
@@ -2098,6 +3196,12 @@ dependencies = [
  "digest",
 ]
 
+[[package]]
+name = "shlex"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
+
 [[package]]
 name = "signature"
 version = "2.2.0"
@@ -2108,6 +3212,27 @@ dependencies = [
  "rand_core 0.6.4",
 ]
 
+[[package]]
+name = "simd-adler32"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e320a6c5ad31d271ad523dcf3ad13e2767ad8b1cb8f047f75a8aeaf8da139da2"
+
+[[package]]
+name = "simd_helpers"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "95890f873bec569a0362c235787f3aca6e1e887302ba4840839bcc6459c42da6"
+dependencies = [
+ "quote",
+]
+
+[[package]]
+name = "smallvec"
+version = "1.15.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67b1b7a3b5fe4f1376887184045fcf45c69e92af734b7aaddc05fb777b6fbd03"
+
 [[package]]
 name = "smoltcp"
 version = "0.12.0"
@@ -2219,6 +3344,12 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "tap"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
+
 [[package]]
 name = "termcolor"
 version = "1.4.1"
@@ -2248,6 +3379,42 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "tiff"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b63feaf3343d35b6ca4d50483f94843803b0f51634937cc2ec519fc32232bc52"
+dependencies = [
+ "fax",
+ "flate2",
+ "half",
+ "quick-error",
+ "weezl",
+ "zune-jpeg",
+]
+
+[[package]]
+name = "toml"
+version = "0.8.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc1beb996b9d83529a9e75c17a1686767d148d70663143c7854d8b4a09ced362"
+dependencies = [
+ "indexmap",
+ "serde",
+ "serde_spanned",
+ "toml_datetime 0.6.11",
+ "toml_edit 0.22.27",
+]
+
+[[package]]
+name = "toml_datetime"
+version = "0.6.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22cddaf88f4fbc13c51aebbf5f8eceb5c7c5a9da2ac40a13519eb5b0a0e8f11c"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "toml_datetime"
 version = "0.7.5+spec-1.1.0"
@@ -2257,6 +3424,20 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "toml_edit"
+version = "0.22.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41fe8c660ae4257887cf66394862d21dbca4a6ddd26f04a3560410406a2f819a"
+dependencies = [
+ "indexmap",
+ "serde",
+ "serde_spanned",
+ "toml_datetime 0.6.11",
+ "toml_write",
+ "winnow",
+]
+
 [[package]]
 name = "toml_edit"
 version = "0.23.10+spec-1.0.0"
@@ -2264,7 +3445,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "84c8b9f757e028cee9fa244aea147aab2a9ec09d5325a9b01e0a49730c2b5269"
 dependencies = [
  "indexmap",
- "toml_datetime",
+ "toml_datetime 0.7.5+spec-1.1.0",
  "toml_parser",
  "winnow",
 ]
@@ -2278,6 +3459,12 @@ dependencies = [
  "winnow",
 ]
 
+[[package]]
+name = "toml_write"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d99f8c9a7727884afe522e9bd5edbfc91a3312b36a77b5fb8926e4c31a41801"
+
 [[package]]
 name = "trouble-host"
 version = "0.5.1"
@@ -2294,8 +3481,8 @@ dependencies = [
  "futures",
  "heapless 0.9.2",
  "p256",
- "rand",
- "rand_chacha",
+ "rand 0.8.5",
+ "rand_chacha 0.3.1",
  "rand_core 0.6.4",
  "static_cell",
  "trouble-host-macros",
@@ -2308,7 +3495,7 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bcb85bec3a8393c22ca1a7c25c82c2d33689ab412f3487c492fd01a033ede7c2"
 dependencies = [
- "convert_case",
+ "convert_case 0.8.0",
  "darling 0.20.11",
  "proc-macro2",
  "quote",
@@ -2368,7 +3555,18 @@ version = "1.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b3758f5e68192bb96cc8f9b7e2c2cfdabb435499a28499a42f8f984092adad4b"
 dependencies = [
- "getrandom",
+ "getrandom 0.2.15",
+]
+
+[[package]]
+name = "v_frame"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "666b7727c8875d6ab5db9533418d7c764233ac9c0cff1d469aec8fa127597be2"
+dependencies = [
+ "aligned-vec",
+ "num-traits",
+ "wasm-bindgen",
 ]
 
 [[package]]
@@ -2395,6 +3593,66 @@ version = "0.11.1+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
 
+[[package]]
+name = "wasip2"
+version = "1.0.2+wasi-0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9517f9239f02c069db75e65f174b3da828fe5f5b945c4dd26bd25d89c03ebcf5"
+dependencies = [
+ "wit-bindgen",
+]
+
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.114"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6532f9a5c1ece3798cb1c2cfdba640b9b3ba884f5db45973a6f442510a87d38e"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "rustversion",
+ "wasm-bindgen-macro",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.114"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "18a2d50fcf105fb33bb15f00e7a77b772945a2ee45dcf454961fd843e74c18e6"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.114"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "03ce4caeaac547cdf713d280eda22a730824dd11e6b8c3ca9e42247b25c631e3"
+dependencies = [
+ "bumpalo",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.114"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "75a326b8c223ee17883a4251907455a2431acc2791c98c26279376490c378c16"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "weezl"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a28ac98ddc8b9274cb41bb4d9d4d5c425b6020c50c46f25559911905610b4a88"
+
 [[package]]
 name = "winapi-util"
 version = "0.1.11"
@@ -2428,13 +3686,19 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "wit-bindgen"
+version = "0.51.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7249219f66ced02969388cf2bb044a09756a083d0fab1e566056b04d9fbcaa5"
+
 [[package]]
 name = "ws-framer"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "75a918023503304dc681e5f014fc291f68fcdcc886993f9cc6fffc0a0cef329e"
 dependencies = [
- "getrandom",
+ "getrandom 0.2.15",
  "httparse",
  "itoa",
  "ws-framer-macros",
@@ -2446,12 +3710,21 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "67fe343b024b086505b3c647de6eae0c26235934cb9138a180e3ac5f97a6aeda"
 dependencies = [
- "itertools",
+ "itertools 0.13.0",
  "proc-macro2",
  "quote",
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "wyz"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05f360fc0b24296329c78fda852a1e9ae82de9cf7b27dae4b7f62f118f77b9ed"
+dependencies = [
+ "tap",
+]
+
 [[package]]
 name = "xtensa-lx"
 version = "0.13.0"
@@ -2483,6 +3756,23 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "y4m"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a5a4b21e1a62b67a2970e6831bc091d7b87e119e7f9791aef9702e3bef04448"
+
+[[package]]
+name = "yaml-rust2"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a1a1c0bc9823338a3bdf8c61f994f23ac004c6fa32c08cd152984499b445e8d"
+dependencies = [
+ "arraydeque",
+ "encoding_rs",
+ "hashlink",
+]
+
 [[package]]
 name = "zerocopy"
 version = "0.8.39"
@@ -2514,3 +3804,27 @@ name = "zmij"
 version = "1.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"
+
+[[package]]
+name = "zune-core"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb8a0807f7c01457d0379ba880ba6322660448ddebc890ce29bb64da71fb40f9"
+
+[[package]]
+name = "zune-inflate"
+version = "0.2.54"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73ab332fe2f6680068f3582b16a24f90ad7096d5d39b974d1c0aff0125116f02"
+dependencies = [
+ "simd-adler32",
+]
+
+[[package]]
+name = "zune-jpeg"
+version = "0.5.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec5f41c76397b7da451efd19915684f727d7e1d516384ca6bd0ec43ec94de23c"
+dependencies = [
+ "zune-core",
+]
diff --git a/Cargo.toml b/Cargo.toml
index f5aab4a..c8c9da8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,7 +36,6 @@ portable-atomic = { version = "1.13.1", default-features = false }
 critical-section = "1.2.0"
 getrandom = { version = "=0.2.15", features = ["custom"] }
 uuid = { version = "=1.12.1", default-features = false, features = ["v4"] }
-dyn-smooth = "0.2.0"
 esp-hal-ota = { version = "0.4.6", features = ["esp32c3"] }
 esp32c3 = { version = "0.31.0" }
 anyhow = { version = "1.0.102", default-features = false }
@@ -44,16 +43,30 @@ embedded-hal-bus = { version = "0.3.0", features = ["async"] }
 #embedded-tls = { git = "https://github.com/drogue-iot/embedded-tls.git", default-features = false, features = ["alloc", "embedded-io-adapters", "log"] }
 embedded-tls = { git = "https://github.com/filipton/embedded-tls", default-features = false, features = ["alloc", "embedded-io-adapters", "log"] }
 rand_core = { version = "0.6.4", features = ["getrandom"] }
-ag-lcd-async = { git = "https://github.com/filipton/ag-lcd-async", features = [] }
 esp-hal-mfrc522 = { version = "0.3.3", features = ["embassy-time"] }
 esp-bootloader-esp-idf = { version = "0.4.0", features = ["log-04", "esp32c3"] }
 trouble-host = { version = "0.5.1", features = ["scan", "security"] }
 
+# v4 only
+display-interface = { version = "0.5.0", optional = true }
+display-interface-i2c = { version = "0.5.0", optional = true }
+embedded-graphics = { version = "0.8.2", optional = true }
+embedded-graphics-framebuf = { version = "0.5.0", optional = true }
+oled_async = { version = "0.2.0", features = ["i2c"], optional = true }
+bq27441 = { version = "0.1.0", features = ["async", "embassy"], optional = true }
+profont = { version = "0.7.0", optional = true }
+embedded-layout = { version = "0.4.2", optional = true }
+embedded-text = { version = "0.7.3", optional = true }
+
+#v3 only
+dyn-smooth = { version = "0.2.0", optional = true }
+ag-lcd-async = { git = "https://github.com/filipton/ag-lcd-async", features = [], optional = true }
+
 [patch.crates-io]
 elliptic-curve = { git = "https://github.com/filipton/rust-crypto-traits.git" }
 
 [features]
-default = ["sleep"]
+default = ["sleep", "v4"]
 gen_version = []
 bat_dev_lcd = []
 release_build = ["sleep"]
@@ -61,6 +74,8 @@ e2e = []
 qa = []
 sleep = []
 auto_add = []
+v3 = ["dep:dyn-smooth", "dep:ag-lcd-async"]
+v4 = ["dep:display-interface", "dep:display-interface-i2c", "dep:embedded-graphics", "dep:embedded-graphics-framebuf", "dep:oled_async", "dep:bq27441", "dep:profont", "dep:embedded-layout", "dep:embedded-text"]
 
 [profile.dev]
 opt-level = 3
diff --git a/build.rs b/build.rs
index 2237f2a..ffa7c55 100644
--- a/build.rs
+++ b/build.rs
@@ -34,9 +34,14 @@ fn main() {
         format!("D{epoch}")
     };
 
-    // NOTE: change this if something changes in schematic, (but not MCU)
-    // This will enable firmware to be built for multiple hw revisions for example
-    let hw = "v3";
+    let hw = if cfg!(feature = "v4") {
+        "v4"
+    } else if cfg!(feature = "v3") {
+        "v3"
+    } else {
+        "unknown"
+    };
+
     let generated = VERSION_TEMPLATE
         .replace("{version}", &version_str)
         .replace("{hw}", hw)
diff --git a/macros/Cargo.lock b/macros/Cargo.lock
index 8a644bc..42b57be 100644
--- a/macros/Cargo.lock
+++ b/macros/Cargo.lock
@@ -3,25 +3,482 @@
 version = 4
 
 [[package]]
-name = "convert_case"
+name = "adler2"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
+
+[[package]]
+name = "aligned"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee4508988c62edf04abd8d92897fca0c2995d907ce1dfeaf369dac3716a40685"
+dependencies = [
+ "as-slice",
+]
+
+[[package]]
+name = "aligned-vec"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc890384c8602f339876ded803c97ad529f3842aba97f6392b3dba0dd171769b"
+dependencies = [
+ "equator",
+]
+
+[[package]]
+name = "anyhow"
+version = "1.0.102"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f202df86484c868dbad7eaa557ef785d5c66295e41b460ef922eca0723b842c"
+
+[[package]]
+name = "arbitrary"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3d036a3c4ab069c7b410a2ce876bd74808d2d0888a82667669f8e783a898bf1"
+
+[[package]]
+name = "arg_enum_proc_macro"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ae92a5119aa49cdbcf6b9f893fe4e1d98b04ccbf82ee0584ad948a44a734dea"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "arrayvec"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7c02d123df017efcdfbd739ef81735b36c5ba83ec3c59c80a9d7ecc718f92e50"
+
+[[package]]
+name = "as-slice"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "516b6b4f0e40d50dcda9365d53964ec74560ad4284da2e7fc97122cd83174516"
+dependencies = [
+ "stable_deref_trait",
+]
+
+[[package]]
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+
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+checksum = "0f321d77c20e19b92c39e7471cf986812cbb46659d2af674adc4331ef3f18394"
+dependencies = [
+ "aligned",
+ "anyhow",
+ "arg_enum_proc_macro",
+ "arrayvec",
+ "log",
+ "num-rational",
+ "num-traits",
+ "pastey",
+ "rayon",
+ "thiserror",
+ "v_frame",
+ "y4m",
+]
+
+[[package]]
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+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8cfddb07216410377231960af4fcab838eaa12e013417781b78bd95ee22077f8"
+dependencies = [
+ "anyhow",
+ "arrayvec",
+ "log",
+ "nom",
+ "num-rational",
+ "v_frame",
+]
+
+[[package]]
+name = "avif-serialize"
+version = "0.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "375082f007bd67184fb9c0374614b29f9aaa604ec301635f72338bb65386a53d"
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+ "arrayvec",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
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+
+[[package]]
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+ "core2",
+]
+
+[[package]]
+name = "built"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baaaa0ecca5b51987b9423ccdc971514dd8b0bb7b4060b983d3664dad3f1f89f"
+checksum = "f4ad8f11f288f48ca24471bbd51ac257aaeaaa07adae295591266b792902ae64"
+
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+
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+
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+
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+dependencies = [
+ "find-msvc-tools",
+ "jobserver",
+ "libc",
+ "shlex",
+]
+
+[[package]]
+name = "cfg-if"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
+[[package]]
+name = "color_quant"
+version = "1.1.0"
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+checksum = "3d7b894f5411737b7867f4827955924d7c254fc9f4d91a6aad6b097804b1018b"
+
+[[package]]
+name = "convert_case"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "affbf0190ed2caf063e3def54ff444b449371d55c58e513a95ab98eca50adb49"
 dependencies = [
  "unicode-segmentation",
 ]
 
+[[package]]
+name = "core2"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b49ba7ef1ad6107f8824dbe97de947cbaac53c44e7f9756a1fba0d37c1eec505"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "crc32fast"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9481c1c90cbf2ac953f07c8d4a58aa3945c425b7185c9154d67a65e4230da511"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "crossbeam-deque"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9dd111b7b7f7d55b72c0a6ae361660ee5853c9af73f70c3c2ef6858b950e2e51"
+dependencies = [
+ "crossbeam-epoch",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.9.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
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+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.8.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
+
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+
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+
+[[package]]
+name = "equator"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4711b213838dfee0117e3be6ac926007d7f433d7bbe33595975d4190cb07e6fc"
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+ "equator-macro",
+]
+
+[[package]]
+name = "equator-macro"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44f23cf4b44bfce11a86ace86f8a73ffdec849c9fd00a386a53d278bd9e81fb3"
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+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
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+dependencies = [
+ "bit_field",
+ "half",
+ "lebe",
+ "miniz_oxide",
+ "rayon-core",
+ "smallvec",
+ "zune-inflate",
+]
+
+[[package]]
+name = "fax"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f05de7d48f37cd6730705cbca900770cab77a89f413d23e100ad7fad7795a0ab"
+dependencies = [
+ "fax_derive",
+]
+
+[[package]]
+name = "fax_derive"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a0aca10fb742cb43f9e7bb8467c91aa9bcb8e3ffbc6a6f7389bb93ffc920577d"
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+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
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+ "simd-adler32",
+]
+
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+ "crc32fast",
+ "miniz_oxide",
+]
+
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+ "libc",
+ "r-efi",
+ "wasip2",
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+ "color_quant",
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+]
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+]
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+ "bytemuck",
+ "byteorder-lite",
+ "color_quant",
+ "exr",
+ "gif",
+ "image-webp",
+ "moxcms",
+ "num-traits",
+ "png",
+ "qoi",
+ "ravif",
+ "rayon",
+ "rgb",
+ "tiff",
+ "zune-core",
+ "zune-jpeg",
+]
+
+[[package]]
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+ "byteorder-lite",
+ "quick-error",
+]
+
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+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
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+checksum = "2b192c782037fadd9cfa75548310488aabdbf3d2da73885b31bd0abd03351285"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
 
+[[package]]
+name = "jobserver"
+version = "0.1.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9afb3de4395d6b3e67a780b6de64b51c978ecf11cb9a462c66be7d4ca9039d33"
+dependencies = [
+ "getrandom",
+ "libc",
+]
+
+[[package]]
+name = "lebe"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a79a3332a6609480d7d0c9eab957bca6b455b91bb84e66d19f5ff66294b85b8"
+
+[[package]]
+name = "libc"
+version = "0.2.183"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5b646652bf6661599e1da8901b3b9522896f01e736bad5f723fe7a3a27f899d"
+
+[[package]]
+name = "libfuzzer-sys"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f12a681b7dd8ce12bff52488013ba614b869148d54dd79836ab85aafdd53f08d"
+dependencies = [
+ "arbitrary",
+ "cc",
+]
+
+[[package]]
+name = "log"
+version = "0.4.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
+
+[[package]]
+name = "loop9"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fae87c125b03c1d2c0150c90365d7d6bcc53fb73a9acaef207d2d065860f062"
+dependencies = [
+ "imgref",
+]
+
 [[package]]
 name = "macros"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "convert_case",
+ "image",
  "proc-macro2",
  "quote",
  "serde",
@@ -29,35 +486,327 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
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+ "itertools",
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+ "log",
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+ "new_debug_unreachable",
+ "noop_proc_macro",
+ "num-derive",
+ "num-traits",
+ "paste",
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 [[package]]
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@@ -91,28 +840,95 @@ dependencies = [
 
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+ "quick-error",
+ "weezl",
+ "zune-jpeg",
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+
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@@ -124,3 +940,136 @@ name = "unicode-segmentation"
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diff --git a/macros/Cargo.toml b/macros/Cargo.toml
index 2c18044..97b8c25 100644
--- a/macros/Cargo.toml
+++ b/macros/Cargo.toml
@@ -7,9 +7,11 @@ edition = "2021"
 proc-macro = true
 
 [dependencies]
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-proc-macro2 = "1.0.95"
-quote = "1.0.40"
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-serde_json = "1.0.142"
-syn = { version = "2.0.104", features = ["extra-traits", "full"] }
+anyhow = "1.0.102"
+convert_case = "0.11.0"
+image = "0.25.10"
+proc-macro2 = "1.0.106"
+quote = "1.0.45"
+serde = { version = "1.0.228", features = ["derive"] }
+serde_json = "1.0.149"
+syn = { version = "2.0.117", features = ["extra-traits", "full"] }
diff --git a/macros/src/lib.rs b/macros/src/lib.rs
index 80ff700..c3619fc 100644
--- a/macros/src/lib.rs
+++ b/macros/src/lib.rs
@@ -1,5 +1,6 @@
 #![feature(proc_macro_span)]
 
+mod pixelart;
 mod translations;
 
 use proc_macro::TokenStream;
@@ -204,6 +205,11 @@ pub fn load_default_translations(args: TokenStream) -> TokenStream {
     translations::load_translations_macro(args)
 }
 
+#[proc_macro]
+pub fn load_lcd_resources(args: TokenStream) -> TokenStream {
+    pixelart::load_lcd_resources(args)
+}
+
 // Maybe not useful, most variables in functions that can fail are owned :(
 /*
 struct MacroInput {
diff --git a/macros/src/pixelart.rs b/macros/src/pixelart.rs
new file mode 100644
index 0000000..cc367db
--- /dev/null
+++ b/macros/src/pixelart.rs
@@ -0,0 +1,152 @@
+use convert_case::Casing;
+use image::{GenericImageView, ImageReader};
+use proc_macro::TokenStream;
+use quote::{format_ident, quote};
+use std::path::PathBuf;
+use syn::{
+    parse::{Parse, ParseStream},
+    LitStr,
+};
+
+#[derive(Debug)]
+#[allow(dead_code)]
+struct PixelArtHandler {
+    path: String,
+}
+
+impl Parse for PixelArtHandler {
+    fn parse(input: ParseStream) -> Result<Self, syn::Error> {
+        let path = input.parse::<LitStr>()?;
+
+        Ok(PixelArtHandler { path: path.value() })
+    }
+}
+
+pub fn load_lcd_resources(args: TokenStream) -> TokenStream {
+    let PixelArtHandler { path } = syn::parse_macro_input!(args as PixelArtHandler);
+
+    let mut resources = Vec::new();
+    let mut res = std::fs::read_dir(path).expect("Cannot read specified path");
+    while let Some(Ok(e)) = res.next() {
+        let metadata = e.metadata().unwrap();
+        if metadata.is_file() {
+            if let Ok((width, height, data)) = parse_img(e.path()) {
+                let name = format_ident!(
+                    "{}",
+                    e.file_name()
+                        .to_string_lossy()
+                        .split(".")
+                        .next()
+                        .unwrap()
+                        .to_case(convert_case::Case::Constant)
+                );
+                let data_tokens = quote! { &[#(#data),*] };
+
+                resources.push(quote! {
+                    pub const #name: PixelArt = PixelArt::new(#data_tokens, #width, #height);
+                });
+            }
+        }
+    }
+
+    quote! {
+        pub struct Resources {}
+
+        impl Resources {
+            #(#resources)*
+        }
+    }
+    .into()
+}
+
+fn parse_img(path: PathBuf) -> anyhow::Result<(u32, u32, Vec<u8>)> {
+    let img = ImageReader::open(path)?.decode()?;
+    let (w, h) = img.dimensions();
+
+    let mut bounding_box_left = 0;
+    let mut bounding_box_right = w;
+    let mut bounding_box_top = h;
+    let mut bounding_box_bottom = 0;
+
+    for x in 0..w {
+        let mut all_clear = true;
+        for y in 0..h {
+            let px = img.get_pixel(x, y).0;
+            if px == [0, 0, 0, 255] {
+                all_clear = false;
+                break;
+            }
+        }
+
+        if !all_clear {
+            bounding_box_right = x;
+        }
+    }
+
+    for x in (0..w).rev() {
+        let mut all_clear = true;
+        for y in 0..h {
+            let px = img.get_pixel(x, y).0;
+            if px == [0, 0, 0, 255] {
+                all_clear = false;
+                break;
+            }
+        }
+
+        if !all_clear {
+            bounding_box_left = x;
+        }
+    }
+
+    for y in 0..h {
+        let mut all_clear = true;
+        for x in 0..w {
+            let px = img.get_pixel(x, y).0;
+            if px == [0, 0, 0, 255] {
+                all_clear = false;
+                break;
+            }
+        }
+
+        if !all_clear {
+            bounding_box_top = y;
+        }
+    }
+
+    for y in (0..h).rev() {
+        let mut all_clear = true;
+        for x in 0..w {
+            let px = img.get_pixel(x, y).0;
+            if px == [0, 0, 0, 255] {
+                all_clear = false;
+                break;
+            }
+        }
+
+        if !all_clear {
+            bounding_box_bottom = y;
+        }
+    }
+
+    let x_size = bounding_box_right - bounding_box_left + 1;
+    let y_size = bounding_box_top - bounding_box_bottom + 1;
+
+    let bytes_per_row = (x_size + 7) / 8;
+    let mut data = vec![0u8; (bytes_per_row * y_size) as usize];
+    for y in bounding_box_bottom..=bounding_box_top {
+        for x in bounding_box_left..=bounding_box_right {
+            let px = img.get_pixel(x, y).0;
+
+            if px == [0, 0, 0, 255] {
+                let relative_x = x - bounding_box_left;
+                let relative_y = y - bounding_box_bottom;
+
+                let byte_idx = (relative_y * bytes_per_row + relative_x / 8) as usize;
+                let bit_idx = 7 - (relative_x % 8);
+                data[byte_idx] |= 1 << bit_idx;
+            }
+        }
+    }
+
+    Ok((x_size, y_size, data))
+}
diff --git a/release.sh b/release.sh
index e0a6751..3f213d6 100755
--- a/release.sh
+++ b/release.sh
@@ -24,14 +24,17 @@ while [ -z "$RELEASE_VERSION" ]; do
 done
 
 source ~/export-esp.sh
-RELEASE_BUILD="$RELEASE_VERSION" cargo build -r
-
 EPOCH=$(date +%s)
 
+RELEASE_BUILD="$RELEASE_VERSION" cargo build -r --no-default-features --features v3,sleep
 mkdir -p /tmp/fkm-build &> /dev/null
 espflash save-image --chip esp32c3 ./target/riscv32imc-unknown-none-elf/release/fkm-firmware "/tmp/fkm-build/v3_STATION_${RELEASE_VERSION}.bin"
 ./append_metadata.sh "/tmp/fkm-build/v3_STATION_${RELEASE_VERSION}.bin" "$RELEASE_VERSION" "STATION" "v3" "$EPOCH"
 
+RELEASE_BUILD="$RELEASE_VERSION" cargo build -r --no-default-features --features v4,sleep
+espflash save-image --chip esp32c3 ./target/riscv32imc-unknown-none-elf/release/fkm-firmware "/tmp/fkm-build/v4_STATION_${RELEASE_VERSION}.bin"
+./append_metadata.sh "/tmp/fkm-build/v4_STATION_${RELEASE_VERSION}.bin" "$RELEASE_VERSION" "STATION" "v4" "$EPOCH"
+
 cd $SCRIPT_DIR
 echo "Version: $RELEASE_VERSION"
 
diff --git a/src/battery.rs b/src/battery_v3.rs
similarity index 100%
rename from src/battery.rs
rename to src/battery_v3.rs
diff --git a/src/battery_v4.rs b/src/battery_v4.rs
new file mode 100644
index 0000000..f5dbe0a
--- /dev/null
+++ b/src/battery_v4.rs
@@ -0,0 +1,110 @@
+use crate::{consts::BATTERY_SEND_INTERVAL_MS, state::sleep_state, utils::shared_i2c::SharedI2C};
+use embassy_time::{Instant, Timer};
+
+const BATTERY_CURVE: [(f64, u8); 11] = [
+    (3350.0, 0),
+    (3400.0, 13),
+    (3450.0, 19),
+    (3500.0, 25),
+    (3550.0, 31),
+    (3600.0, 38),
+    (3700.0, 50),
+    (3800.0, 63),
+    (3900.0, 75),
+    (4000.0, 88),
+    (4100.0, 100),
+];
+const BAT_MIN: f64 = BATTERY_CURVE[0].0;
+const BAT_MAX: f64 = BATTERY_CURVE[BATTERY_CURVE.len() - 1].0;
+
+#[embassy_executor::task]
+pub async fn battery_read_task(i2c: SharedI2C, state: crate::state::GlobalState) {
+    let Ok(mut gauge) = bq27441::Bq27441Async::new(i2c).await else {
+        log::error!("BQ27441 init failed!");
+        return;
+    };
+
+    if let Ok(soc) = gauge.state_of_charge().await
+        && soc == 0
+    {
+        log::warn!("Battery was removed before boot!");
+    }
+
+    let mut last_soc = 101;
+    let mut last_charging = true;
+    let mut last_sent = Instant::now();
+    loop {
+        if sleep_state() {
+            Timer::after_millis(500).await;
+            continue;
+        }
+
+        let mut soc = gauge.state_of_charge().await.unwrap_or(0) as u8;
+        let mv = gauge.voltage().await.unwrap_or(0) as f64;
+        if soc == 0 {
+            soc = bat_percentage(calculate(mv));
+        }
+        let ma = gauge.average_current().await.unwrap_or(0);
+        let charging = ma >= 0;
+
+        if last_soc != soc || last_charging != charging {
+            {
+                let mut state = state.state.lock().await;
+                state.battery_status = (soc, charging)
+            }
+
+            state.show_battery.signal(soc);
+            last_soc = soc;
+            last_charging = charging;
+        }
+
+        if last_sent.elapsed().as_millis() >= BATTERY_SEND_INTERVAL_MS {
+            if state.state.lock().await.server_connected == Some(true) {
+                crate::ws::send_packet(crate::structs::TimerPacket {
+                    tag: None,
+                    data: crate::structs::TimerPacketInner::Battery {
+                        level: Some(soc as f64),
+                        voltage: Some(mv),
+                    },
+                })
+                .await;
+            }
+
+            log::info!("Battery {mv}mv {soc}% (avg current: {ma}mA)");
+            last_sent = Instant::now();
+        }
+
+        Timer::after_millis(100).await;
+    }
+}
+
+fn interpolate(v1: f64, p1: u8, v2: f64, p2: u8, voltage: f64) -> u8 {
+    let percentage = p1 as f64 + (voltage - v1) * (p2 as f64 - p1 as f64) / (v2 - v1);
+    percentage as u8
+}
+
+fn bat_percentage(mv: f64) -> u8 {
+    if mv <= BAT_MIN {
+        return 0;
+    }
+    if mv >= BAT_MAX {
+        return 100;
+    }
+
+    // Find the two closest voltage points in our curve
+    for window in BATTERY_CURVE.windows(2) {
+        let (v1, p1) = window[0];
+        let (v2, p2) = window[1];
+
+        if mv >= v1 && mv <= v2 {
+            return interpolate(v1, p1, v2, p2, mv);
+        }
+    }
+
+    // Fallback to linear interpolation if something goes wrong
+    ((mv - BAT_MIN) / (BAT_MAX - BAT_MIN) * 100.0) as u8
+}
+
+fn calculate(x: f64) -> f64 {
+    1.69874 * x + 66.6103
+}
diff --git a/src/board.rs b/src/board.rs
index 29e88bf..7473e1f 100644
--- a/src/board.rs
+++ b/src/board.rs
@@ -1,8 +1,5 @@
-use crate::utils::stackmat::{DEC_DIGITS, DOT_MOD};
-use adv_shift_registers::wrappers::ShifterValueRange;
-use embedded_hal::digital::OutputPin;
 use esp_hal::{
-    gpio::{AnyPin, Input, InputConfig, Level, Output, Pin, Pull},
+    gpio::{AnyPin, Input, InputConfig, Output, Pin, Pull},
     peripherals::{
         ADC1, AES, BT, FLASH, Peripherals, SPI2, SW_INTERRUPT, TIMG0, TIMG1, UART1, WIFI,
     },
@@ -10,6 +7,12 @@ use esp_hal::{
     timer::timg::TimerGroup,
 };
 
+#[cfg(feature = "v3")]
+use crate::utils::stackmat::{DEC_DIGITS, DOT_MOD};
+
+#[cfg(feature = "v4")]
+use crate::utils::shared_i2c::SharedI2C;
+
 #[allow(dead_code)]
 pub struct Board {
     // peripherals
@@ -27,18 +30,35 @@ pub struct Board {
     pub sw_interrupt: SW_INTERRUPT<'static>,
 
     // spi
+    #[cfg(feature = "v3")]
     pub miso: AnyPin<'static>,
+    #[cfg(feature = "v3")]
     pub mosi: AnyPin<'static>,
+    #[cfg(feature = "v3")]
     pub sck: AnyPin<'static>,
+    #[cfg(feature = "v3")]
     pub cs: adv_shift_registers::wrappers::ShifterPin,
 
+    #[cfg(feature = "v4")]
+    pub display_rst: Output<'static>,
+    #[cfg(feature = "v4")]
+    pub i2c: SharedI2C,
+
     pub stackmat_rx: AnyPin<'static>,
 
+    #[cfg(feature = "v4")]
+    pub buttons: [Input<'static>; 4],
+
+    #[cfg(feature = "v3")]
     pub battery: esp_hal::peripherals::GPIO2<'static>,
+    #[cfg(feature = "v3")]
     pub button_input: Input<'static>,
-    pub digits_shifters: ShifterValueRange,
+    #[cfg(feature = "v3")]
+    pub digits_shifters: adv_shift_registers::wrappers::ShifterValueRange,
 
+    #[cfg(feature = "v3")]
     pub buttons_shifter: adv_shift_registers::wrappers::ShifterValue,
+    #[cfg(feature = "v3")]
     pub lcd: adv_shift_registers::wrappers::ShifterValue,
 
     // usb pins
@@ -46,8 +66,102 @@ pub struct Board {
     pub usb_dm: AnyPin<'static>,
 }
 
+#[cfg(feature = "v4")]
+impl Board {
+    pub fn init(peripherals: Peripherals) -> Board {
+        let timg0 = TimerGroup::new(peripherals.TIMG0);
+        let timg1 = TimerGroup::new(peripherals.TIMG1);
+        let rng = Rng::new();
+        let uart1 = peripherals.UART1;
+        let spi2 = peripherals.SPI2;
+        let spi_dma = peripherals.DMA_CH0;
+        let adc1 = peripherals.ADC1;
+        let wifi = peripherals.WIFI;
+        let bt = peripherals.BT;
+        let aes = peripherals.AES;
+        let flash = peripherals.FLASH;
+        let sw_interrupt = peripherals.SW_INTERRUPT;
+
+        let stackmat_rx = peripherals.GPIO20.degrade();
+        let usb_dp = peripherals.GPIO19.degrade();
+        let usb_dm = peripherals.GPIO18.degrade();
+
+        let display_rst = Output::new(
+            peripherals.GPIO7,
+            esp_hal::gpio::Level::Low,
+            Default::default(),
+        );
+
+        let b1 = Input::new(
+            peripherals.GPIO0,
+            InputConfig::default().with_pull(Pull::Down),
+        );
+
+        let b2 = Input::new(
+            peripherals.GPIO1,
+            InputConfig::default().with_pull(Pull::Down),
+        );
+
+        let b3 = Input::new(
+            peripherals.GPIO2,
+            InputConfig::default().with_pull(Pull::Down),
+        );
+
+        let b4 = Input::new(
+            peripherals.GPIO3,
+            InputConfig::default().with_pull(Pull::Down),
+        );
+
+        let i2c = esp_hal::i2c::master::I2c::new(
+            peripherals.I2C0,
+            esp_hal::i2c::master::Config::default()
+                .with_frequency(esp_hal::time::Rate::from_khz(400)),
+        );
+
+        let i2c = match i2c {
+            Ok(i2c) => {
+                let i2c = i2c
+                    .with_sda(peripherals.GPIO8)
+                    .with_scl(peripherals.GPIO9)
+                    .into_async();
+
+                SharedI2C::new(Some(i2c))
+            }
+            Err(_) => SharedI2C::new(None),
+        };
+
+        Board {
+            timg0,
+            timg1,
+            rng,
+            uart1,
+            spi2,
+            spi_dma,
+            adc1,
+            wifi,
+            bt,
+            aes,
+            flash,
+            sw_interrupt,
+
+            i2c,
+
+            display_rst,
+            stackmat_rx,
+            buttons: [b1, b2, b3, b4],
+
+            usb_dp,
+            usb_dm,
+        }
+    }
+}
+
+#[cfg(feature = "v3")]
 impl Board {
     pub fn init(peripherals: Peripherals) -> Board {
+        use embedded_hal::digital::OutputPin;
+        use esp_hal::gpio::Level;
+
         let timg0 = TimerGroup::new(peripherals.TIMG0);
         let timg1 = TimerGroup::new(peripherals.TIMG1);
         let rng = Rng::new();
diff --git a/src/buttons.rs b/src/buttons.rs
index efb4616..48e2937 100644
--- a/src/buttons.rs
+++ b/src/buttons.rs
@@ -15,8 +15,9 @@ macros::generate_button_handler_enum!(triggered: &ButtonTrigger, hold_time: u64,
 #[embassy_executor::task]
 pub async fn buttons_task(
     state: GlobalState,
-    button_input: Input<'static>,
-    button_reg: adv_shift_registers::wrappers::ShifterValue,
+    #[cfg(feature = "v4")] button_inputs: [Input<'static>; 4],
+    #[cfg(feature = "v3")] button_input: Input<'static>,
+    #[cfg(feature = "v3")] button_reg: adv_shift_registers::wrappers::ShifterValue,
 ) {
     let mut handler = ButtonsHandler::new(Some(wakeup_button()));
     handler.add_handler(Button::Third, ButtonTrigger::Up, submit_up());
@@ -55,7 +56,10 @@ pub async fn buttons_task(
     );
     handler.add_handler(Button::Second, ButtonTrigger::Up, delegate_hold());
 
+    #[cfg(feature = "v3")]
     handler.run(&state, &button_input, &button_reg).await;
+    #[cfg(feature = "v4")]
+    handler.run(&state, &button_inputs).await;
 }
 
 #[macros::button_handler]
@@ -174,6 +178,7 @@ async fn submit_up(
     match state_val.menu_scene {
         Some(MenuScene::Signing) | Some(MenuScene::Unsigning) => {
             state_val.menu_scene = None;
+            state_val.selected_config_menu = Some(0);
             state.state.signal();
             return Ok(true);
         }
@@ -206,6 +211,7 @@ async fn submit_up(
 
             state_val.menu_scene = None;
             state_val.selected_bluetooth_item = 0;
+            state_val.selected_config_menu = Some(0);
             state.state.signal();
             return Ok(true);
         }
diff --git a/src/consts.rs b/src/consts.rs
index f0ad7c4..9e00f4a 100644
--- a/src/consts.rs
+++ b/src/consts.rs
@@ -16,6 +16,7 @@ pub const LOG_SEND_INTERVAL_MS: u64 = 5000;
 
 pub const BATTERY_SEND_INTERVAL_MS: u64 = 60000;
 
+#[allow(dead_code)]
 pub const SCROLL_TICKER_INVERVAL_MS: u64 = 500;
 pub const LCD_INSPECTION_FRAME_TIME: u64 = 1000 / 30;
 
diff --git a/src/lcd.rs b/src/lcd_v3.rs
similarity index 99%
rename from src/lcd.rs
rename to src/lcd_v3.rs
index d742682..0f37065 100644
--- a/src/lcd.rs
+++ b/src/lcd_v3.rs
@@ -642,7 +642,7 @@ async fn process_lcd_overwrite(
     }
 
     if current_state.server_connected == Some(false) {
-        if current_state.wifi_conn_lost {
+        if current_state.wifi_connected == Some(false) {
             // TODO: maybe add to this translation
             _ = lcd_driver.print(0, "Wi-Fi", PrintAlign::Center, true);
             _ = lcd_driver.print(1, "Connection lost", PrintAlign::Center, true);
diff --git a/src/lcd_v4.rs b/src/lcd_v4.rs
new file mode 100644
index 0000000..b6fe145
--- /dev/null
+++ b/src/lcd_v4.rs
@@ -0,0 +1,817 @@
+use crate::{
+    consts::{
+        DEEPER_SLEEP_AFTER_MS, INSPECTION_TIME_PLUS2, LCD_INSPECTION_FRAME_TIME, SLEEP_AFTER_MS,
+    },
+    state::{
+        GlobalState, MenuScene, Scene, SignaledGlobalStateInner, deeper_sleep_state, sleep_state,
+    },
+    translations::{TranslationKey, get_translation, get_translation_params},
+    utils::{
+        lcd_resourcese::{CrossedIcon, Resources},
+        shared_i2c::SharedI2C,
+        stackmat::ms_to_time_str,
+    },
+};
+use alloc::{format, rc::Rc, string::ToString};
+use anyhow::{Result, anyhow};
+use display_interface_i2c::I2CInterface;
+use embassy_sync::{blocking_mutex::raw::NoopRawMutex, signal::Signal};
+use embassy_time::{Delay, Instant, Timer};
+use embedded_graphics::{
+    Drawable,
+    mono_font::MonoTextStyle,
+    pixelcolor::BinaryColor,
+    prelude::*,
+    primitives::{Line, PrimitiveStyle, Rectangle},
+    text::{Alignment, Baseline, Text, TextStyle, TextStyleBuilder},
+};
+use embedded_graphics_framebuf::FrameBuf;
+use embedded_layout::{
+    layout::linear::{FixedMargin, Horizontal, LinearLayout},
+    prelude::*,
+    view_group::ViewGroup,
+};
+use embedded_text::{
+    TextBox,
+    alignment::{HorizontalAlignment, VerticalAlignment},
+    style::TextBoxStyleBuilder,
+};
+use esp_hal::gpio::Output;
+use oled_async::{displays::ssd1309::Ssd1309_128_64, mode::GraphicsMode};
+
+pub const FBUF_WIDTH: usize = 128;
+pub const FBUF_HEIGHT: usize = 64;
+pub const FBUF_SIZE: usize = FBUF_WIDTH * FBUF_HEIGHT;
+
+pub struct OledData<'a> {
+    pub fbuf: FrameBuf<BinaryColor, &'a mut [BinaryColor; FBUF_SIZE]>,
+    pub disp: GraphicsMode<Ssd1309_128_64, I2CInterface<SharedI2C>>,
+}
+
+impl OledData<'_> {
+    pub async fn flush(&mut self) -> Result<()> {
+        self.disp
+            .draw_iter(&self.fbuf)
+            .map_err(|e| anyhow!("{e:?}"))?;
+        self.disp.flush().await.map_err(|e| anyhow!("{e:?}"))?;
+
+        Ok(())
+    }
+
+    pub fn clear_main(&mut self) -> Result<()> {
+        self.fbuf.fill_solid(&MAIN_RECT, BinaryColor::Off);
+        Ok(())
+    }
+}
+
+pub const MAIN_RECT: Rectangle = Rectangle::new(Point::new(0, 11), Size::new(128, 53));
+pub const TOPBAR_RECT: Rectangle = Rectangle::new(Point::new(0, 0), Size::new(128, 10));
+pub const NORMAL_FONT: MonoTextStyle<'_, BinaryColor> = MonoTextStyle::new(
+    &embedded_graphics::mono_font::ascii::FONT_7X13,
+    BinaryColor::On,
+);
+pub const SMALL_FONT: MonoTextStyle<'_, BinaryColor> = MonoTextStyle::new(
+    &embedded_graphics::mono_font::ascii::FONT_6X9,
+    BinaryColor::On,
+);
+pub const TIMER_FONT: MonoTextStyle<'_, BinaryColor> =
+    MonoTextStyle::new(&profont::PROFONT_14_POINT, BinaryColor::On);
+
+pub const TEXT_CENTER: TextStyle = TextStyleBuilder::new()
+    .alignment(Alignment::Center)
+    .baseline(Baseline::Middle)
+    .build();
+pub const TEXT_TOPBAR: TextStyle = TextStyleBuilder::new()
+    .alignment(Alignment::Right)
+    .baseline(Baseline::Top)
+    .build();
+
+fn center_layout<VG: ViewGroup>(
+    content: VG,
+) -> LinearLayout<Horizontal<embedded_layout::align::vertical::Center>, VG> {
+    LinearLayout::horizontal(content)
+        .with_alignment(embedded_layout::align::vertical::Center)
+        .arrange()
+        .align_to(
+            &MAIN_RECT,
+            embedded_layout::align::horizontal::Center,
+            embedded_layout::align::vertical::Center,
+        )
+}
+
+fn center_text_layout(text: &str) -> TextBox<'_, MonoTextStyle<'_, BinaryColor>> {
+    let textbox_style = TextBoxStyleBuilder::new()
+        .alignment(HorizontalAlignment::Center)
+        .vertical_alignment(VerticalAlignment::Middle)
+        .build();
+
+    TextBox::with_textbox_style(text, MAIN_RECT, NORMAL_FONT, textbox_style)
+}
+
+fn draw_scrollable_menu<D>(target: &mut D, items: &[&str], selected: usize)
+where
+    D: DrawTarget<Color = BinaryColor>,
+{
+    const LINE_HEIGHT: i32 = 10;
+    const VISIBLE: usize = 5;
+    const PADDING_X: i32 = 4;
+
+    let menu_font = MonoTextStyle::new(
+        &embedded_graphics::mono_font::ascii::FONT_6X9,
+        BinaryColor::On,
+    );
+    let menu_font_inv = MonoTextStyle::new(
+        &embedded_graphics::mono_font::ascii::FONT_6X9,
+        BinaryColor::Off,
+    );
+
+    let total = items.len();
+    let scroll_start = if selected + 1 >= VISIBLE {
+        (selected + 1 - VISIBLE).min(total.saturating_sub(VISIBLE))
+    } else {
+        0
+    };
+
+    let start_y = MAIN_RECT.top_left.y;
+
+    for (row, item) in items[scroll_start..].iter().take(VISIBLE).enumerate() {
+        let item_idx = scroll_start + row;
+        let y = start_y + row as i32 * LINE_HEIGHT;
+        let text_y = y + LINE_HEIGHT / 2;
+
+        if item_idx == selected {
+            let bar = Rectangle::new(Point::new(0, y), Size::new(128, LINE_HEIGHT as u32));
+            bar.into_styled(PrimitiveStyle::with_fill(BinaryColor::On))
+                .draw(target)
+                .ok();
+            Text::with_text_style(
+                item,
+                Point::new(PADDING_X, text_y),
+                menu_font_inv,
+                TextStyleBuilder::new()
+                    .alignment(Alignment::Left)
+                    .baseline(Baseline::Middle)
+                    .build(),
+            )
+            .draw(target)
+            .ok();
+        } else {
+            Text::with_text_style(
+                item,
+                Point::new(PADDING_X, text_y),
+                menu_font,
+                TextStyleBuilder::new()
+                    .alignment(Alignment::Left)
+                    .baseline(Baseline::Middle)
+                    .build(),
+            )
+            .draw(target)
+            .ok();
+        }
+
+        if scroll_start > 0 && row == 0 {
+            Text::with_text_style("^", Point::new(122, text_y), menu_font, TEXT_CENTER)
+                .draw(target)
+                .ok();
+        }
+        if scroll_start + VISIBLE < total && row == VISIBLE - 1 {
+            Text::with_text_style("v", Point::new(122, text_y), menu_font, TEXT_CENTER)
+                .draw(target)
+                .ok();
+        }
+    }
+}
+
+#[embassy_executor::task]
+pub async fn lcd_task(
+    i2c: SharedI2C,
+    mut display_rst: Output<'static>,
+    global_state: GlobalState,
+    wifi_setup_sig: Rc<Signal<NoopRawMutex, ()>>,
+) {
+    let di = display_interface_i2c::I2CInterface::new(i2c, 0x3C, 0x40);
+    let raw_disp =
+        oled_async::builder::Builder::new(oled_async::displays::ssd1309::Ssd1309_128_64 {})
+            .with_rotation(oled_async::prelude::DisplayRotation::Rotate0)
+            .connect(di);
+
+    let mut disp: oled_async::mode::GraphicsMode<_, _> = raw_disp.into();
+    disp.reset(&mut display_rst, &mut Delay);
+
+    let disp_init = async {
+        disp.init().await?;
+        disp.clear();
+        disp.flush().await?;
+
+        anyhow::Result::<(), display_interface::DisplayError>::Ok(())
+    }
+    .await;
+
+    if let Err(e) = disp_init {
+        log::error!("Disp init error: {e:?} (but continuing i guess)");
+    }
+
+    let mut data = alloc::vec![embedded_graphics::pixelcolor::BinaryColor::Off; FBUF_SIZE];
+    let Some(data): Option<&mut [BinaryColor; FBUF_SIZE]> = data.as_mut_array() else {
+        log::error!("Disp framebuffer data alloc failed!");
+        return;
+    };
+    let fbuf = embedded_graphics_framebuf::FrameBuf::new(data, FBUF_WIDTH, FBUF_HEIGHT);
+
+    let mut oled = OledData { fbuf, disp };
+
+    global_state.show_battery.wait().await;
+    _ = process_top_bar(
+        &global_state.state.value().await.clone(),
+        &global_state,
+        &mut oled,
+    )
+    .await;
+
+    let text = format!(
+        "S/N: {:X}\nVER: {}",
+        crate::utils::get_efuse_u32(),
+        crate::version::VERSION
+    );
+    let text = Text::with_text_style(&text, Point::zero(), NORMAL_FONT, TEXT_CENTER);
+
+    center_layout(Chain::new(text)).draw(&mut oled.fbuf);
+    _ = oled.flush().await;
+
+    Timer::after_millis(2500).await;
+
+    let mut last_update;
+    loop {
+        let current_state = global_state.state.value().await.clone();
+        log::debug!("lcd current_state: {current_state:?}");
+        last_update = Instant::now();
+
+        if sleep_state() {
+            unsafe {
+                crate::state::SLEEP_STATE = false;
+            }
+            log::warn!("Sleep wakeup!");
+        }
+
+        let current_scene = current_state.scene.clone();
+        let fut = async {
+            oled.fbuf.clear(BinaryColor::Off);
+            _ = process_top_bar(&current_state, &global_state, &mut oled).await;
+            _ = process_main(&current_state, &global_state, &wifi_setup_sig, &mut oled).await;
+            _ = oled.flush().await;
+
+            loop {
+                Timer::after_millis(1000).await;
+                if global_state.show_battery.signaled() {
+                    oled.fbuf.fill_solid(&TOPBAR_RECT, BinaryColor::Off);
+                    let current_state = global_state.state.value().await;
+                    _ = process_top_bar(&current_state, &global_state, &mut oled).await;
+                    _ = oled.flush().await;
+
+                    global_state.show_battery.reset();
+                }
+
+                #[cfg(not(any(feature = "e2e", feature = "qa")))]
+                if !sleep_state()
+                    && (Instant::now() - last_update).as_millis() > SLEEP_AFTER_MS
+                    && current_scene.can_sleep()
+                {
+                    oled.fbuf.clear(BinaryColor::Off);
+
+                    let text =
+                        Text::with_text_style("Sleep", Point::zero(), NORMAL_FONT, TEXT_CENTER);
+
+                    center_layout(Chain::new(text)).draw(&mut oled.fbuf);
+                    _ = oled.flush().await;
+
+                    {
+                        global_state.state.lock().await.server_connected = Some(false);
+                    }
+
+                    unsafe {
+                        crate::state::SLEEP_STATE = true;
+                        crate::state::TRUST_SERVER = false;
+                    }
+
+                    global_state.state.signal_reset();
+                }
+
+                #[cfg(not(any(feature = "e2e", feature = "qa")))]
+                if sleep_state()
+                    && !deeper_sleep_state()
+                    && (Instant::now() - last_update).as_millis() > DEEPER_SLEEP_AFTER_MS
+                {
+                    use esp_hal::rtc_cntl::{Rtc, sleep::RtcioWakeupSource};
+
+                    oled.fbuf.clear(BinaryColor::Off);
+                    let text = Text::with_text_style(
+                        "Deep Sleep",
+                        Point::zero(),
+                        NORMAL_FONT,
+                        TEXT_CENTER,
+                    );
+
+                    center_layout(Chain::new(text)).draw(&mut oled.fbuf);
+                    _ = oled.flush().await;
+
+                    unsafe {
+                        use esp_hal::rtc_cntl::sleep::WakeupLevel;
+
+                        let wakeup_pins: &mut [(
+                            &mut dyn esp_hal::gpio::RtcPinWithResistors,
+                            esp_hal::rtc_cntl::sleep::WakeupLevel,
+                        )] = &mut [
+                            (&mut esp_hal::peripherals::GPIO0::steal(), WakeupLevel::High),
+                            (&mut esp_hal::peripherals::GPIO1::steal(), WakeupLevel::High),
+                            (&mut esp_hal::peripherals::GPIO2::steal(), WakeupLevel::High),
+                            (&mut esp_hal::peripherals::GPIO3::steal(), WakeupLevel::High),
+                        ];
+                        let rtcio = RtcioWakeupSource::new(wakeup_pins);
+                        Rtc::new(esp_hal::peripherals::LPWR::steal()).sleep_deep(&[&rtcio]);
+                    }
+                }
+            }
+        };
+
+        let res = embassy_futures::select::select(fut, global_state.state.wait()).await;
+        match res {
+            embassy_futures::select::Either::First(_) => {}
+            embassy_futures::select::Either::Second(_) => {
+                continue;
+            }
+        }
+    }
+}
+
+fn battery_layout<VG: ViewGroup>(
+    content: VG,
+) -> LinearLayout<Horizontal<embedded_layout::align::vertical::Center, FixedMargin>, VG> {
+    LinearLayout::horizontal(content)
+        .with_alignment(embedded_layout::align::vertical::Center)
+        .with_spacing(FixedMargin(1))
+        .arrange()
+        .align_to(
+            &Rectangle::new(Point::new(0, 0), Size::new(128, 10)),
+            embedded_layout::align::horizontal::Right,
+            embedded_layout::align::vertical::Center,
+        )
+}
+
+fn topbar_icons_layout<VG: ViewGroup>(
+    content: VG,
+) -> LinearLayout<Horizontal<embedded_layout::align::vertical::Center, FixedMargin>, VG> {
+    LinearLayout::horizontal(content)
+        .with_alignment(embedded_layout::align::vertical::Center)
+        .with_spacing(FixedMargin(2))
+        .arrange()
+        .align_to(
+            &Rectangle::new(Point::new(0, 0), Size::new(128, 10)),
+            embedded_layout::align::horizontal::Left,
+            embedded_layout::align::vertical::Center,
+        )
+}
+
+async fn process_top_bar(
+    current_state: &SignaledGlobalStateInner,
+    _global_state: &GlobalState,
+    oled: &mut OledData<'_>,
+) -> Result<()> {
+    let text = format!("{}%", current_state.battery_status.0);
+    let text = Text::with_text_style(&text, Point::zero(), NORMAL_FONT, TEXT_TOPBAR);
+    if current_state.battery_status.1 {
+        battery_layout(Chain::new(Resources::CHARGING).append(text)).draw(&mut oled.fbuf)?;
+    } else {
+        battery_layout(Chain::new(text)).draw(&mut oled.fbuf)?;
+    }
+
+    topbar_icons_layout(
+        Chain::new(CrossedIcon::new(
+            Resources::WIFI,
+            !current_state.wifi_connected.unwrap_or(false),
+            9,
+        ))
+        .append(CrossedIcon::new(
+            Resources::SERVER,
+            !current_state.server_connected.unwrap_or(false),
+            9,
+        ))
+        .append(CrossedIcon::new(
+            Resources::TIMER,
+            !current_state.stackmat_connected.unwrap_or(false),
+            9,
+        )),
+    )
+    .draw(&mut oled.fbuf)?;
+
+    let text = if current_state.selected_config_menu.is_some() {
+        Some("CONFIG")
+    } else {
+        match current_state.menu_scene {
+            Some(MenuScene::Signing) => Some("SIGN"),
+            Some(MenuScene::Unsigning) => Some("UNSIGN"),
+            Some(MenuScene::BtDisplay) => Some("BTDISP"),
+            None => None,
+        }
+    };
+    if let Some(text) = text {
+        Text::with_text_style(text, Point::new(64, 5), SMALL_FONT, TEXT_CENTER)
+            .draw(&mut oled.fbuf)?;
+    }
+
+    Line::new(Point::new(0, 10), Point::new(128, 10))
+        .into_styled(PrimitiveStyle::with_stroke(BinaryColor::On, 1))
+        .draw(&mut oled.fbuf)?;
+
+    Ok(())
+}
+
+async fn process_main(
+    current_state: &SignaledGlobalStateInner,
+    global_state: &GlobalState,
+    wifi_setup_sig: &Signal<NoopRawMutex, ()>,
+    oled: &mut OledData<'_>,
+) -> Result<()> {
+    if let Some(ref error_text) = current_state.error_text {
+        center_text_layout(&format!(
+            "{}\n{}",
+            get_translation(TranslationKey::ERROR_HEADER),
+            error_text
+        ))
+        .draw(&mut oled.fbuf)?;
+
+        return Ok(());
+    }
+
+    // display custom message on top of everything!
+    if let Some((line1, line2)) = &current_state.custom_message {
+        center_text_layout(&format!("{line1}\n{line2}")).draw(&mut oled.fbuf)?;
+        return Ok(());
+    }
+
+    if let Some(sel) = current_state.selected_config_menu {
+        let items: alloc::vec::Vec<alloc::string::String> = crate::structs::CONFIG_MENU_ITEMS
+            .iter()
+            .enumerate()
+            .map(|(i, name)| alloc::format!("{}. {}", i + 1, name))
+            .collect();
+        let item_refs: alloc::vec::Vec<&str> = items.iter().map(|s| s.as_str()).collect();
+        draw_scrollable_menu(&mut oled.fbuf, &item_refs, sel);
+        return Ok(());
+    }
+
+    match current_state.menu_scene {
+        Some(MenuScene::Signing) | Some(MenuScene::Unsigning) => {
+            let prefix = if current_state.menu_scene == Some(MenuScene::Signing) {
+                "S"
+            } else {
+                "Uns"
+            };
+
+            let main_text = format!("{prefix}igning");
+
+            if global_state.sign_unsign_progress.signaled() {
+                let status = if global_state.sign_unsign_progress.wait().await {
+                    "OK"
+                } else {
+                    "FAIL"
+                };
+
+                center_text_layout(&format!("{main_text}\nOperation: {status}"))
+                    .draw(&mut oled.fbuf)?;
+                oled.flush().await?;
+
+                Timer::after_millis(300).await;
+                oled.clear_main()?;
+                center_text_layout(&format!("{main_text}\nScan the card\n\nSubmit to exit"))
+                    .draw(&mut oled.fbuf)?;
+            } else {
+                center_text_layout(&format!("{main_text}\nScan the card\n\nSubmit to exit"))
+                    .draw(&mut oled.fbuf)?;
+            }
+
+            return Ok(());
+        }
+        Some(crate::state::MenuScene::BtDisplay) => {
+            let mut items: alloc::vec::Vec<alloc::string::String> = current_state
+                .discovered_bluetooth_devices
+                .iter()
+                .map(|dev| alloc::format!("{} [{:X?}]", dev.name, dev.addr))
+                .collect();
+            items.push("Unpair".into());
+            items.push("Exit".into());
+
+            let sel = current_state.selected_bluetooth_item;
+            if sel >= items.len() {
+                global_state.state.lock().await.selected_bluetooth_item = 0;
+            } else {
+                let item_refs: alloc::vec::Vec<&str> = items.iter().map(|s| s.as_str()).collect();
+                draw_scrollable_menu(&mut oled.fbuf, &item_refs, sel);
+            }
+            return Ok(());
+        }
+        None => {}
+    }
+
+    let overwritten = process_main_overwrite(current_state, global_state, oled).await;
+    if overwritten {
+        return Ok(());
+    }
+
+    if let Some(time) = current_state.delegate_hold {
+        let delegate_remaining = 3 - time;
+
+        if delegate_remaining == 0 {
+            center_text_layout(&format!(
+                "{}\n{}",
+                get_translation(TranslationKey::WAITING_FOR_DELEGATE_HEADER),
+                get_translation(TranslationKey::WAITING_FOR_DELEGATE_FOOTER)
+            ))
+            .draw(&mut oled.fbuf)?;
+        } else {
+            center_text_layout(&format!(
+                "{}\n{}",
+                get_translation(TranslationKey::CALLING_FOR_DELEGATE_HEADER),
+                get_translation_params(
+                    TranslationKey::CALLING_FOR_DELEGATE_FOOTER,
+                    &[delegate_remaining],
+                )
+            ))
+            .draw(&mut oled.fbuf)?;
+        }
+
+        return Ok(());
+    }
+
+    match current_state.scene {
+        Scene::WifiConnect => {
+            center_text_layout(&format!(
+                "{}\n{}",
+                get_translation(TranslationKey::WAITING_FOR_WIFI_HEADER),
+                get_translation(TranslationKey::WAITING_FOR_WIFI_FOOTER)
+            ))
+            .draw(&mut oled.fbuf)?;
+            oled.flush().await?;
+
+            wifi_setup_sig.wait().await;
+            global_state.state.lock().await.scene = Scene::AutoSetupWait;
+        }
+        Scene::AutoSetupWait => {
+            let wifi_ssid = alloc::format!("FKM-{:X}", crate::utils::get_efuse_u32());
+
+            center_text_layout(&format!(
+                "{}\n{wifi_ssid}",
+                get_translation(TranslationKey::WIFI_SETUP_HEADER),
+            ))
+            .draw(&mut oled.fbuf)?;
+        }
+        Scene::MdnsWait => {
+            center_text_layout(&format!(
+                "{}\n{}",
+                get_translation(TranslationKey::WAITING_FOR_MDNS_HEADER),
+                get_translation(TranslationKey::WAITING_FOR_MDNS_FOOTER)
+            ))
+            .draw(&mut oled.fbuf)?;
+        }
+        Scene::GroupSelect => {
+            let lt = Text::with_text_style("<", Point::zero(), TIMER_FONT, TEXT_CENTER);
+            let gt = Text::with_text_style(">", Point::zero(), TIMER_FONT, TEXT_CENTER);
+            LinearLayout::horizontal(Chain::new(lt))
+                .with_alignment(embedded_layout::align::vertical::Center)
+                .arrange()
+                .align_to(
+                    &MAIN_RECT,
+                    embedded_layout::align::horizontal::Left,
+                    embedded_layout::align::vertical::Center,
+                )
+                .draw(&mut oled.fbuf)?;
+
+            LinearLayout::horizontal(Chain::new(gt))
+                .with_alignment(embedded_layout::align::vertical::Center)
+                .arrange()
+                .align_to(
+                    &MAIN_RECT,
+                    embedded_layout::align::horizontal::Right,
+                    embedded_layout::align::vertical::Center,
+                )
+                .draw(&mut oled.fbuf)?;
+
+            center_text_layout(&format!(
+                "{}\n{}",
+                get_translation(TranslationKey::SELECT_GROUP),
+                current_state.possible_groups[current_state.group_selected_idx].secondary_text
+            ))
+            .draw(&mut oled.fbuf)?;
+        }
+        Scene::WaitingForCompetitor => {
+            if let Some(solve_time) = current_state.solve_time {
+                let time_str = ms_to_time_str(solve_time);
+                center_text_layout(&format!(
+                    "{}\n{}",
+                    get_translation(TranslationKey::SCAN_COMPETITOR_CARD_HEADER),
+                    &get_translation_params(
+                        TranslationKey::SCAN_COMPETITOR_CARD_WITH_TIME_FOOTER,
+                        &[time_str],
+                    )
+                ))
+                .draw(&mut oled.fbuf)?;
+            } else {
+                center_text_layout(&format!(
+                    "{}\n{}",
+                    get_translation(TranslationKey::SCAN_COMPETITOR_CARD_HEADER),
+                    get_translation(TranslationKey::SCAN_COMPETITOR_CARD_FOOTER),
+                ))
+                .draw(&mut oled.fbuf)?;
+            }
+        }
+        Scene::CompetitorInfo => {
+            let mut text = current_state
+                .competitor_display
+                .clone()
+                .unwrap_or("------".to_string())
+                .to_string();
+
+            if let Some(ref group) = current_state.solve_group {
+                text += &format!("\n{}", group.secondary_text);
+            }
+
+            center_text_layout(&text).draw(&mut oled.fbuf)?;
+        }
+        Scene::Inspection => {
+            oled.clear_main()?;
+            oled.flush().await?;
+            let inspection_start = global_state
+                .state
+                .value()
+                .await
+                .inspection_start
+                .unwrap_or(Instant::now());
+
+            _ = Text::with_text_style("Inspection", Point::new(64, 50), NORMAL_FONT, TEXT_CENTER)
+                .draw(&mut oled.disp);
+
+            let text_rect = Rectangle::new(Point::new(0, 28), Size::new(128, 17));
+            loop {
+                let elapsed = (Instant::now() - inspection_start).as_millis();
+                let time_str = ms_to_time_str(elapsed);
+
+                _ = oled.disp.fill_solid(&text_rect, BinaryColor::Off);
+                _ = Text::with_text_style(&time_str, Point::new(64, 36), TIMER_FONT, TEXT_CENTER)
+                    .draw(&mut oled.disp);
+                _ = oled.disp.flush().await;
+
+                Timer::after_millis(LCD_INSPECTION_FRAME_TIME).await;
+            }
+        }
+        Scene::Timer => {
+            oled.clear_main()?;
+            oled.flush().await?;
+            let text_rect = Rectangle::new(Point::new(0, 28), Size::new(128, 17));
+
+            loop {
+                let time = global_state.timer_signal.wait().await;
+                let time_str = ms_to_time_str(time);
+
+                _ = oled.disp.fill_solid(&text_rect, BinaryColor::Off);
+                _ = Text::with_text_style(&time_str, Point::new(64, 36), TIMER_FONT, TEXT_CENTER)
+                    .draw(&mut oled.disp);
+                _ = oled.disp.flush().await;
+            }
+        }
+        Scene::Finished => {
+            let solve_time = current_state.solve_time.unwrap_or(0);
+            let time_str = ms_to_time_str(solve_time);
+
+            let inspection_time =
+                match (current_state.inspection_start, current_state.inspection_end) {
+                    (Some(start), Some(end)) => {
+                        Some(end.saturating_duration_since(start).as_millis())
+                    }
+                    _ => None,
+                };
+
+            let time_display = if current_state.use_inspection()
+                && inspection_time.unwrap_or(0) > INSPECTION_TIME_PLUS2
+            {
+                let inspection_seconds = inspection_time.unwrap_or(0) / 1000;
+                alloc::format!("{time_str}+{inspection_seconds}s")
+            } else {
+                alloc::format!("{time_str}")
+            };
+
+            let penalty = current_state.penalty.unwrap_or(0);
+            let penalty_str: alloc::string::String = match penalty {
+                -2 => "DNS".into(),
+                -1 => "DNF".into(),
+                1.. => alloc::format!("+{penalty}"),
+                _ => alloc::string::String::new(),
+            };
+
+            if penalty_str.is_empty() {
+                let time_text =
+                    Text::with_text_style(&time_display, Point::zero(), TIMER_FONT, TEXT_CENTER);
+                LinearLayout::horizontal(Chain::new(time_text))
+                    .with_alignment(embedded_layout::align::vertical::Center)
+                    .arrange()
+                    .align_to(
+                        &MAIN_RECT,
+                        embedded_layout::align::horizontal::Center,
+                        embedded_layout::align::vertical::Top,
+                    )
+                    .translate(Point::new(0, 10))
+                    .draw(&mut oled.fbuf)?;
+            } else {
+                let time_text =
+                    Text::with_text_style(&time_display, Point::zero(), TIMER_FONT, TEXT_CENTER);
+                let penalty_text =
+                    Text::with_text_style(&penalty_str, Point::zero(), TIMER_FONT, TEXT_CENTER);
+                LinearLayout::horizontal(Chain::new(time_text).append(penalty_text))
+                    .with_alignment(embedded_layout::align::vertical::Center)
+                    .with_spacing(embedded_layout::layout::linear::spacing::FixedMargin(4))
+                    .arrange()
+                    .align_to(
+                        &MAIN_RECT,
+                        embedded_layout::align::horizontal::Center,
+                        embedded_layout::align::vertical::Top,
+                    )
+                    .translate(Point::new(0, 10))
+                    .draw(&mut oled.fbuf)?;
+            }
+
+            let status = if !current_state.time_confirmed {
+                Some(get_translation(TranslationKey::CONFIRM_TIME))
+            } else if current_state.current_judge.is_none() {
+                Some(get_translation(TranslationKey::SCAN_JUDGE_CARD))
+            } else if current_state.current_competitor.is_some()
+                && current_state.current_judge.is_some()
+            {
+                Some(get_translation(TranslationKey::SCAN_COMPETITOR_CARD))
+            } else {
+                None
+            };
+
+            if let Some(status_str) = status {
+                let textbox_style = TextBoxStyleBuilder::new()
+                    .alignment(HorizontalAlignment::Center)
+                    .vertical_alignment(VerticalAlignment::Bottom)
+                    .build();
+
+                TextBox::with_textbox_style(&status_str, MAIN_RECT, NORMAL_FONT, textbox_style)
+                    .draw(&mut oled.fbuf)?;
+            }
+        }
+        Scene::Update => loop {
+            let progress = global_state.update_progress.wait().await;
+            oled.clear_main()?;
+            center_text_layout(&format!("Updating\n{progress}%")).draw(&mut oled.fbuf)?;
+            oled.flush().await?;
+        },
+    }
+
+    Ok(())
+}
+
+async fn process_main_overwrite(
+    current_state: &SignaledGlobalStateInner,
+    _global_state: &GlobalState,
+    oled: &mut OledData<'_>,
+) -> bool {
+    if !current_state.scene.can_be_lcd_overwritten() {
+        return false;
+    }
+
+    if current_state.server_connected == Some(false) {
+        if current_state.wifi_connected == Some(false) {
+            _ = center_text_layout("Wi-Fi\nConnection lost").draw(&mut oled.fbuf);
+        } else {
+            let text = format!(
+                "{}\n{}",
+                get_translation(TranslationKey::SERVER_DISCONNECTED_HEADER),
+                get_translation(TranslationKey::SERVER_DISCONNECTED_FOOTER)
+            );
+            _ = center_text_layout(&text).draw(&mut oled.fbuf);
+        }
+    } else if current_state.device_added == Some(false) {
+        #[cfg(not(feature = "e2e"))]
+        let lines = (
+            &get_translation(TranslationKey::DEVICE_NOT_ADDED_HEADER),
+            &get_translation(TranslationKey::DEVICE_NOT_ADDED_FOOTER),
+        );
+
+        #[cfg(feature = "e2e")]
+        let lines = ("Press submit", "To start HIL");
+
+        let text = format!("{}\n{}", lines.0, lines.1);
+        _ = center_text_layout(&text).draw(&mut oled.fbuf);
+    } else if current_state.stackmat_connected == Some(false) {
+        let text = format!(
+            "{}\n{}",
+            get_translation(TranslationKey::STACKMAT_DISCONNECTED_HEADER),
+            get_translation(TranslationKey::STACKMAT_DISCONNECTED_FOOTER)
+        );
+        _ = center_text_layout(&text).draw(&mut oled.fbuf);
+    } else {
+        return false;
+    }
+
+    true
+}
diff --git a/src/main.rs b/src/main.rs
index d696a05..17e43af 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,6 @@
 #![no_std]
 #![no_main]
 #![feature(impl_trait_in_assoc_type)]
-#![feature(asm_experimental_arch)]
 #![deny(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 extern crate alloc;
@@ -21,12 +20,10 @@ use structs::ConnSettings;
 use utils::{logger::FkmLogger, set_brownout_detection};
 use ws_framer::{WsUrl, WsUrlOwned};
 
-mod battery;
 mod bluetooth;
 mod board;
 mod buttons;
 mod consts;
-mod lcd;
 mod mdns;
 mod rfid;
 mod stackmat;
@@ -37,6 +34,16 @@ mod utils;
 mod version;
 mod ws;
 
+#[cfg(feature = "v3")]
+mod battery_v3;
+#[cfg(feature = "v3")]
+mod lcd_v3;
+
+#[cfg(feature = "v4")]
+mod battery_v4;
+#[cfg(feature = "v4")]
+mod lcd_v4;
+
 #[cfg(feature = "qa")]
 mod qa;
 
@@ -106,6 +113,10 @@ async fn main(spawner: Spawner) {
         }
     };
 
+    let reason = esp_hal::rtc_cntl::reset_reason(esp_hal::system::Cpu::ProCpu);
+    let wake_reason = esp_hal::rtc_cntl::wakeup_cause();
+    log::info!("Wake reason: {:?} {:?}", reason, wake_reason);
+
     let global_state = Rc::new(GlobalStateInner::new(&nvs, board.aes));
     let wifi_setup_sig = Rc::new(Signal::new());
     let wifi_conn_sig = Rc::new(Signal::new());
@@ -114,35 +125,63 @@ async fn main(spawner: Spawner) {
         unsafe { crate::state::SIGN_KEY = sign_key };
     }
 
-    spawner.must_spawn(lcd::lcd_task(
+    #[cfg(feature = "v3")]
+    spawner.must_spawn(lcd_v3::lcd_task(
         board.lcd,
         global_state.clone(),
         wifi_setup_sig.clone(),
         board.digits_shifters.clone(),
     ));
+    #[cfg(feature = "v4")]
+    spawner.must_spawn(lcd_v4::lcd_task(
+        board.i2c.clone(),
+        board.display_rst,
+        global_state.clone(),
+        wifi_setup_sig.clone(),
+    ));
 
-    spawner.must_spawn(battery::battery_read_task(
+    #[cfg(feature = "v3")]
+    spawner.must_spawn(battery_v3::battery_read_task(
         board.battery,
         board.adc1,
         global_state.clone(),
     ));
+    #[cfg(feature = "v4")]
+    spawner.must_spawn(battery_v4::battery_read_task(
+        board.i2c.clone(),
+        global_state.clone(),
+    ));
+
     spawner.must_spawn(buttons::buttons_task(
         global_state.clone(),
+        #[cfg(feature = "v4")]
+        board.buttons,
+        #[cfg(feature = "v3")]
         board.button_input,
+        #[cfg(feature = "v3")]
         board.buttons_shifter,
     ));
     spawner.must_spawn(stackmat::stackmat_task(
         board.uart1,
         board.stackmat_rx,
+        #[cfg(feature = "v3")]
         board.digits_shifters,
         global_state.clone(),
     ));
     spawner.must_spawn(rfid::rfid_task(
+        #[cfg(feature = "v4")]
+        board.i2c.clone(),
+        #[cfg(feature = "v3")]
         board.miso,
+        #[cfg(feature = "v3")]
         board.mosi,
+        #[cfg(feature = "v3")]
         board.sck,
+        #[cfg(feature = "v3")]
         board.cs,
+        #[cfg(feature = "v3")]
         board.spi2,
+        #[cfg(feature = "v3")]
         board.spi_dma,
         global_state.clone(),
     ));
@@ -194,6 +233,10 @@ async fn main(spawner: Spawner) {
         esp_hal::system::software_reset();
     };
 
+    {
+        global_state.state.lock().await.wifi_connected = Some(true);
+    }
+
     #[cfg(feature = "qa")]
     crate::qa::send_qa_resp(crate::qa::QaSignal::WifiSetup);
 
diff --git a/src/resources/CHARGING.png b/src/resources/CHARGING.png
new file mode 100644
index 0000000..5288b1c
Binary files /dev/null and b/src/resources/CHARGING.png differ
diff --git a/src/resources/SERVER.png b/src/resources/SERVER.png
new file mode 100644
index 0000000..cb0872e
Binary files /dev/null and b/src/resources/SERVER.png differ
diff --git a/src/resources/TIMER.png b/src/resources/TIMER.png
new file mode 100644
index 0000000..f5f10be
Binary files /dev/null and b/src/resources/TIMER.png differ
diff --git a/src/resources/WIFI.png b/src/resources/WIFI.png
new file mode 100644
index 0000000..82d22a4
Binary files /dev/null and b/src/resources/WIFI.png differ
diff --git a/src/rfid.rs b/src/rfid.rs
index 072e6d9..8eb5b0a 100644
--- a/src/rfid.rs
+++ b/src/rfid.rs
@@ -5,36 +5,50 @@ use crate::translations::{TranslationKey, get_translation};
 use alloc::string::ToString;
 use anyhow::{Result, anyhow};
 use embassy_time::{Duration, Instant, Timer};
+use esp_hal_mfrc522::consts::UidSize;
+
+#[cfg(feature = "v3")]
 use esp_hal::time::Rate;
+#[cfg(feature = "v3")]
 use esp_hal::{
     dma::{DmaRxBuf, DmaTxBuf},
     dma_buffers,
     gpio::AnyPin,
     spi::{Mode, master::Spi},
 };
-use esp_hal_mfrc522::consts::UidSize;
 
 #[embassy_executor::task]
 pub async fn rfid_task(
-    miso: AnyPin<'static>,
-    mosi: AnyPin<'static>,
-    sck: AnyPin<'static>,
-    cs_pin: adv_shift_registers::wrappers::ShifterPin,
-    spi: esp_hal::peripherals::SPI2<'static>,
-    dma_chan: esp_hal::peripherals::DMA_CH0<'static>,
+    #[cfg(feature = "v4")] i2c: crate::utils::shared_i2c::SharedI2C,
+    #[cfg(feature = "v3")] miso: AnyPin<'static>,
+    #[cfg(feature = "v3")] mosi: AnyPin<'static>,
+    #[cfg(feature = "v3")] sck: AnyPin<'static>,
+    #[cfg(feature = "v3")] cs_pin: adv_shift_registers::wrappers::ShifterPin,
+    #[cfg(feature = "v3")] spi: esp_hal::peripherals::SPI2<'static>,
+    #[cfg(feature = "v3")] dma_chan: esp_hal::peripherals::DMA_CH0<'static>,
     global_state: GlobalState,
 ) {
+    #[cfg(feature = "v4")]
+    let mut mfrc522 = {
+        let driver = esp_hal_mfrc522::drivers::I2CDriver::new(i2c, 0x28);
+        esp_hal_mfrc522::MFRC522::new(driver)
+    };
+
     #[allow(clippy::manual_div_ceil)]
+    #[cfg(feature = "v3")]
     let (rx_buffer, rx_descriptors, tx_buffer, tx_descriptors) = dma_buffers!(512);
+    #[cfg(feature = "v3")]
     let Ok(dma_tx_buf) = DmaTxBuf::new(tx_descriptors, tx_buffer) else {
         log::error!("Dma tx buf failed");
         return;
     };
+    #[cfg(feature = "v3")]
     let Ok(dma_rx_buf) = DmaRxBuf::new(rx_descriptors, rx_buffer) else {
         log::error!("Dma rx buf failed");
         return;
     };
 
+    #[cfg(feature = "v3")]
     let Ok(spi) = Spi::new(
         spi,
         esp_hal::spi::master::Config::default()
@@ -53,6 +67,7 @@ pub async fn rfid_task(
         return;
     };
 
+    #[cfg(feature = "v3")]
     let mut mfrc522 = {
         let Ok(spi) = embedded_hal_bus::spi::ExclusiveDevice::new(spi, cs_pin, embassy_time::Delay)
         else {
@@ -84,11 +99,11 @@ pub async fn rfid_task(
         if sleep_state() != rfid_sleep {
             rfid_sleep = sleep_state();
 
-            /*
             match rfid_sleep {
                 true => _ = mfrc522.pcd_soft_power_down().await,
                 false => {
                     _ = mfrc522.pcd_soft_power_up().await;
+                    Timer::after_millis(100).await;
                     loop {
                         _ = mfrc522.pcd_init().await;
                         if mfrc522.pcd_is_init().await {
@@ -102,7 +117,6 @@ pub async fn rfid_task(
                     }
                 }
             }
-            */
         }
 
         if rfid_sleep {
diff --git a/src/stackmat.rs b/src/stackmat.rs
index e88ba68..32faf9b 100644
--- a/src/stackmat.rs
+++ b/src/stackmat.rs
@@ -1,11 +1,8 @@
 use crate::{
     consts::{INSPECTION_TIME_DNF, INSPECTION_TIME_PLUS2},
     state::{GlobalState, Scene, sleep_state},
-    utils::stackmat::{
-        StackmatTimerState, ms_to_time_str, parse_stackmat_data, time_str_to_display,
-    },
+    utils::stackmat::{StackmatTimerState, parse_stackmat_data},
 };
-use adv_shift_registers::wrappers::ShifterValueRange;
 use alloc::string::ToString;
 use embassy_time::{Instant, Timer};
 use esp_hal::{gpio::AnyPin, peripherals::UART1, uart::UartRx};
@@ -16,7 +13,7 @@ pub static mut CURRENT_TIME: u64 = 0;
 pub async fn stackmat_task(
     uart: UART1<'static>,
     uart_pin: AnyPin<'static>,
-    display: ShifterValueRange,
+    #[cfg(feature = "v3")] display: adv_shift_registers::wrappers::ShifterValueRange,
     global_state: GlobalState,
 ) {
     let serial_config = esp_hal::uart::Config::default().with_baudrate(1200);
@@ -50,12 +47,12 @@ pub async fn stackmat_task(
             && last_state != Some(false)
         {
             last_state = Some(false);
+            #[cfg(feature = "v3")]
             display.set_data(&[255; 6]);
 
             let mut state = global_state.state.lock().await;
             state.stackmat_connected = Some(false);
 
-            // TODO: re-think this and maybe reset whole state?
             if state.scene == Scene::Timer {
                 if state.current_competitor.is_some() {
                     state.scene = Scene::CompetitorInfo;
@@ -159,6 +156,7 @@ pub async fn stackmat_task(
                             state.scene = Scene::Timer;
                         }
                     } else if parsed.0 == StackmatTimerState::Stopped {
+                        log::info!("Timer stopped: {}ms", parsed.1);
                         let mut state = global_state.state.lock().await;
                         let last_solve_diff = if cfg!(not(any(feature = "e2e", feature = "qa"))) {
                             state.last_solve_time.unwrap_or(0).abs_diff(parsed.1)
@@ -202,8 +200,13 @@ pub async fn stackmat_task(
                                 saved_state.to_nvs(&global_state.nvs).await;
                             }
 
-                            let time_str = ms_to_time_str(parsed.1);
-                            display.set_data(&time_str_to_display(&time_str));
+                            #[cfg(feature = "v3")]
+                            {
+                                let time_str = crate::utils::stackmat::ms_to_time_str(parsed.1);
+                                display.set_data(&crate::utils::stackmat::time_str_to_display(
+                                    &time_str,
+                                ));
+                            }
 
                             #[cfg(feature = "qa")]
                             crate::qa::send_qa_resp(crate::qa::QaSignal::Stackmat(parsed.1));
@@ -237,6 +240,7 @@ pub async fn stackmat_task(
                             state.time_confirmed = true;
                         }
 
+                        #[cfg(feature = "v3")]
                         display.set_data(&[255; 6]);
                     }
 
diff --git a/src/state.rs b/src/state.rs
index c165369..cb55ba1 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -148,10 +148,10 @@ pub struct GlobalStateInner {
     pub state: SignaledMutex<CriticalSectionRawMutex, SignaledGlobalStateInner>,
     pub timer_signal: Signal<NoopRawMutex, u64>,
     pub bt_display_signal: Signal<NoopRawMutex, u64>,
-    pub show_battery: Signal<CriticalSectionRawMutex, u8>,
     pub update_progress: Signal<CriticalSectionRawMutex, u8>,
     pub sign_unsign_progress: Signal<CriticalSectionRawMutex, bool>,
     pub ble_sig: Signal<CriticalSectionRawMutex, BleAction>,
+    pub show_battery: Signal<CriticalSectionRawMutex, u8>,
 
     pub nvs: Nvs,
     pub aes: Mutex<NoopRawMutex, Aes<'static>>,
@@ -166,10 +166,10 @@ impl GlobalStateInner {
             state: SignaledMutex::new(SignaledGlobalStateInner::new()),
             timer_signal: Signal::new(),
             bt_display_signal: Signal::new(),
-            show_battery: Signal::new(),
             update_progress: Signal::new(),
             sign_unsign_progress: Signal::new(),
             ble_sig: Signal::new(),
+            show_battery: Signal::new(),
 
             nvs: nvs.clone(),
             aes: Mutex::new(Aes::new(aes)),
@@ -180,7 +180,7 @@ impl GlobalStateInner {
     }
 }
 
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone)]
 pub struct SignaledGlobalStateInner {
     pub scene: Scene,
     pub menu_scene: Option<MenuScene>,
@@ -206,8 +206,9 @@ pub struct SignaledGlobalStateInner {
 
     pub device_added: Option<bool>,
     pub server_connected: Option<bool>,
-    pub wifi_conn_lost: bool,
+    pub wifi_connected: Option<bool>,
     pub stackmat_connected: Option<bool>,
+
     pub current_competitor: Option<u64>,
     pub current_judge: Option<u64>,
     pub competitor_display: Option<String>,
@@ -215,6 +216,9 @@ pub struct SignaledGlobalStateInner {
     pub delegate_used: bool,
     pub delegate_hold: Option<u8>,
 
+    #[cfg(feature = "v4")]
+    pub battery_status: (u8, bool),
+
     #[cfg(feature = "bat_dev_lcd")]
     pub current_bat_read: Option<f32>,
 
@@ -259,7 +263,7 @@ impl SignaledGlobalStateInner {
 
             device_added: None,
             server_connected: None,
-            wifi_conn_lost: false,
+            wifi_connected: None,
             stackmat_connected: None,
             current_competitor: None,
             current_judge: None,
@@ -268,6 +272,9 @@ impl SignaledGlobalStateInner {
             delegate_used: false,
             delegate_hold: None,
 
+            #[cfg(feature = "v4")]
+            battery_status: (0, false),
+
             #[cfg(feature = "bat_dev_lcd")]
             current_bat_read: None,
 
@@ -367,6 +374,8 @@ impl SignaledGlobalStateInner {
     }
 
     pub fn parse_saved_state(&mut self, saved: SavedGlobalState) {
+        log::warn!("Parsed saved state: {saved:?}");
+
         self.session_id = Some(saved.session_id);
         self.penalty = Some(saved.penalty);
         self.solve_time = Some(saved.solve_time);
@@ -460,3 +469,42 @@ impl SavedGlobalState {
 
     pub async fn clear_saved_global_state(_nvs: &Nvs) {}
 }
+
+impl PartialEq for SignaledGlobalStateInner {
+    fn eq(&self, other: &Self) -> bool {
+        let result = self.scene == other.scene
+            && self.menu_scene == other.menu_scene
+            && self.inspection_start == other.inspection_start
+            && self.inspection_end == other.inspection_end
+            && self.solve_time == other.solve_time
+            && self.last_solve_time == other.last_solve_time
+            && self.penalty == other.penalty
+            && self.session_id == other.session_id
+            && self.time_confirmed == other.time_confirmed
+            && self.solve_group == other.solve_group
+            && self.error_text == other.error_text
+            && self.possible_groups == other.possible_groups
+            && self.group_selected_idx == other.group_selected_idx
+            && self.selected_config_menu == other.selected_config_menu
+            && self.discovered_bluetooth_devices == other.discovered_bluetooth_devices
+            && self.selected_bluetooth_item == other.selected_bluetooth_item
+            && self.device_added == other.device_added
+            && self.server_connected == other.server_connected
+            && self.wifi_connected == other.wifi_connected
+            && self.stackmat_connected == other.stackmat_connected
+            && self.current_competitor == other.current_competitor
+            && self.current_judge == other.current_judge
+            && self.competitor_display == other.competitor_display
+            && self.delegate_used == other.delegate_used
+            && self.delegate_hold == other.delegate_hold
+            // battery_status intentionally excluded (v4 hw)
+            && self.custom_message == other.custom_message;
+
+        #[cfg(feature = "bat_dev_lcd")]
+        let result = result
+            && self.current_bat_read == other.current_bat_read
+            && self.avg_bat_read == other.avg_bat_read;
+
+        result
+    }
+}
diff --git a/src/utils/buttons.rs b/src/utils/buttons.rs
index 7203acd..329e8c0 100644
--- a/src/utils/buttons.rs
+++ b/src/utils/buttons.rs
@@ -68,8 +68,9 @@ impl ButtonsHandler {
     pub async fn run(
         &mut self,
         state: &GlobalState,
-        button_input: &Input<'static>,
-        button_reg: &adv_shift_registers::wrappers::ShifterValue,
+        #[cfg(feature = "v4")] button_inputs: &[Input<'static>],
+        #[cfg(feature = "v3")] button_input: &Input<'static>,
+        #[cfg(feature = "v3")] button_reg: &adv_shift_registers::wrappers::ShifterValue,
     ) {
         let mut debounce_time = esp_hal::time::Instant::now();
         let mut old_debounced = i32::MAX;
@@ -104,6 +105,16 @@ impl ButtonsHandler {
                 }
             }
 
+            #[cfg(feature = "v4")]
+            {
+                for (i, btn) in button_inputs.iter().enumerate().take(4) {
+                    if btn.is_high() {
+                        out_val |= 1 << i;
+                    }
+                }
+            }
+
+            #[cfg(feature = "v3")]
             {
                 let mut val = 0b10000000;
                 for i in 0..4 {
diff --git a/src/utils/lcd_resourcese.rs b/src/utils/lcd_resourcese.rs
new file mode 100644
index 0000000..c42dc04
--- /dev/null
+++ b/src/utils/lcd_resourcese.rs
@@ -0,0 +1,213 @@
+use embedded_graphics::{
+    pixelcolor::BinaryColor,
+    prelude::*,
+    primitives::{Line, PrimitiveStyle, Rectangle},
+};
+
+macros::load_lcd_resources!("src/resources");
+
+#[derive(Clone, Copy)]
+pub struct PixelArt {
+    data: &'static [u8], // packed bits, MSB first, row by row
+    width: u32,
+    height: u32,
+    top_left: Point,
+}
+
+impl PixelArt {
+    pub const fn new(data: &'static [u8], width: u32, height: u32) -> Self {
+        Self {
+            data,
+            width,
+            height,
+            top_left: Point::zero(),
+        }
+    }
+
+    fn bytes_per_row(&self) -> u32 {
+        self.width.div_ceil(8)
+    }
+}
+
+impl Dimensions for PixelArt {
+    fn bounding_box(&self) -> Rectangle {
+        Rectangle::new(self.top_left, Size::new(self.width, self.height))
+    }
+}
+
+impl Transform for PixelArt {
+    fn translate(&self, by: Point) -> Self {
+        Self {
+            top_left: self.top_left + by,
+            ..*self
+        }
+    }
+    fn translate_mut(&mut self, by: Point) -> &mut Self {
+        self.top_left += by;
+        self
+    }
+}
+
+impl Drawable for PixelArt {
+    type Color = BinaryColor;
+    type Output = ();
+
+    fn draw<D: DrawTarget<Color = BinaryColor>>(&self, target: &mut D) -> Result<(), D::Error> {
+        let origin = self.top_left;
+        let bpr = self.bytes_per_row();
+        let (w, h) = (self.width, self.height);
+        let data = self.data;
+
+        target.draw_iter((0..h).flat_map(move |y| {
+            (0..w).map(move |x| {
+                let byte = data[(y * bpr + x / 8) as usize];
+                let on = byte & (0x80 >> (x % 8)) != 0;
+                Pixel(
+                    origin + Point::new(x as i32, y as i32),
+                    if on {
+                        BinaryColor::On
+                    } else {
+                        BinaryColor::Off
+                    },
+                )
+            })
+        }))
+    }
+}
+
+#[allow(dead_code)]
+pub struct Overlay<A, B> {
+    base: A,
+    overlay: B,
+    top_left: Point,
+}
+
+#[allow(dead_code)]
+impl<A: Dimensions, B: Dimensions + Transform> Overlay<A, B> {
+    pub fn new(base: A, overlay: B) -> Self {
+        let base_box = base.bounding_box();
+        let overlay_box = overlay.bounding_box();
+
+        // center overlay over base
+        let offset = Point::new(
+            (base_box.size.width as i32 - overlay_box.size.width as i32) / 2,
+            (base_box.size.height as i32 - overlay_box.size.height as i32) / 2,
+        );
+        let overlay = overlay.translate(base_box.top_left + offset);
+
+        Self {
+            top_left: base_box.top_left,
+            base,
+            overlay,
+        }
+    }
+}
+
+impl<A: Dimensions, B> Dimensions for Overlay<A, B> {
+    fn bounding_box(&self) -> Rectangle {
+        Rectangle::new(self.top_left, self.base.bounding_box().size)
+    }
+}
+
+impl<A: Transform, B: Transform> Transform for Overlay<A, B> {
+    fn translate(&self, by: Point) -> Self {
+        Self {
+            top_left: self.top_left + by,
+            base: self.base.translate(by),
+            overlay: self.overlay.translate(by),
+        }
+    }
+    fn translate_mut(&mut self, by: Point) -> &mut Self {
+        self.top_left += by;
+        self.base.translate_mut(by);
+        self.overlay.translate_mut(by);
+        self
+    }
+}
+
+impl<A, B> Drawable for Overlay<A, B>
+where
+    A: Drawable<Color = BinaryColor>,
+    B: Drawable<Color = BinaryColor>,
+{
+    type Color = BinaryColor;
+    type Output = ();
+
+    fn draw<D: DrawTarget<Color = BinaryColor>>(&self, target: &mut D) -> Result<(), D::Error> {
+        self.base.draw(target)?;
+        self.overlay.draw(target)?;
+        Ok(())
+    }
+}
+
+pub struct CrossedIcon<A> {
+    base: A,
+    top_left: Point,
+    crossed: bool,
+    cross_size: u32,
+}
+
+impl<A: Dimensions> CrossedIcon<A> {
+    pub fn new(base: A, crossed: bool, cross_size: u32) -> Self {
+        let base_box = base.bounding_box();
+        Self {
+            base,
+            top_left: base_box.top_left,
+            crossed,
+            cross_size,
+        }
+    }
+}
+
+impl<A: Dimensions> Dimensions for CrossedIcon<A> {
+    fn bounding_box(&self) -> Rectangle {
+        Rectangle::new(self.top_left, self.base.bounding_box().size)
+    }
+}
+
+impl<A: Transform> Transform for CrossedIcon<A> {
+    fn translate(&self, by: Point) -> Self {
+        Self {
+            top_left: self.top_left + by,
+            base: self.base.translate(by),
+            crossed: self.crossed,
+            cross_size: self.cross_size,
+        }
+    }
+    fn translate_mut(&mut self, by: Point) -> &mut Self {
+        self.top_left += by;
+        self.base.translate_mut(by);
+        self
+    }
+}
+
+impl<A> Drawable for CrossedIcon<A>
+where
+    A: Drawable<Color = BinaryColor> + Dimensions,
+{
+    type Color = BinaryColor;
+    type Output = ();
+    fn draw<D: DrawTarget<Color = BinaryColor>>(&self, target: &mut D) -> Result<(), D::Error> {
+        self.base.draw(target)?;
+        if self.crossed {
+            let thin_stroke = PrimitiveStyle::with_stroke(BinaryColor::On, 1);
+            let bb = self.bounding_box();
+
+            // Center the cross over the bounding box
+            let offset = Point::new(
+                (bb.size.width as i32 - self.cross_size as i32) / 2,
+                (bb.size.height as i32 - self.cross_size as i32) / 2,
+            );
+            let tl = bb.top_left + offset;
+            let s = self.cross_size as i32 - 1;
+
+            Line::new(tl, tl + Point::new(s, s))
+                .into_styled(thin_stroke)
+                .draw(target)?;
+            Line::new(tl + Point::new(0, s), tl + Point::new(s, 0))
+                .into_styled(thin_stroke)
+                .draw(target)?;
+        }
+        Ok(())
+    }
+}
diff --git a/src/utils/mod.rs b/src/utils/mod.rs
index 671ddb1..8bfe1cd 100644
--- a/src/utils/mod.rs
+++ b/src/utils/mod.rs
@@ -1,12 +1,20 @@
 pub mod arc;
 pub mod backtrace_store;
 pub mod buttons;
-pub mod lcd_abstract;
 pub mod logger;
 pub mod rolling_average;
 pub mod signaled_mutex;
 pub mod stackmat;
 
+#[cfg(feature = "v3")]
+pub mod lcd_abstract;
+
+#[cfg(feature = "v4")]
+pub mod shared_i2c;
+
+#[cfg(feature = "v4")]
+pub mod lcd_resourcese;
+
 pub fn set_brownout_detection(state: bool) {
     unsafe {
         let rtc_cntl = &*esp32c3::RTC_CNTL::ptr();
@@ -35,6 +43,7 @@ pub fn get_efuse_u32() -> u32 {
     mac as u32
 }
 
+#[cfg(feature = "v3")]
 /// Sets cpu clock to 10mHz (not reversable)
 pub fn deeper_sleep() {
     esp32c3_set_cpu_freq_10mhz();
@@ -42,6 +51,7 @@ pub fn deeper_sleep() {
     unsafe { crate::state::DEEPER_SLEEP = true };
 }
 
+#[cfg(feature = "v3")]
 #[allow(unused)]
 #[inline(always)]
 fn ets_update_cpu_frequency_rom(ticks_per_us: u32) {
@@ -52,6 +62,7 @@ fn ets_update_cpu_frequency_rom(ticks_per_us: u32) {
     unsafe { ets_update_cpu_frequency(ticks_per_us) };
 }
 
+#[cfg(feature = "v3")]
 fn esp32c3_set_cpu_freq_10mhz() {
     use esp32c3::{RTC_CNTL, SYSTEM};
 
diff --git a/src/utils/shared_i2c.rs b/src/utils/shared_i2c.rs
new file mode 100644
index 0000000..0cd9a6b
--- /dev/null
+++ b/src/utils/shared_i2c.rs
@@ -0,0 +1,44 @@
+use alloc::{rc::Rc, vec::Vec};
+use embassy_sync::{blocking_mutex::raw::NoopRawMutex, mutex::Mutex};
+use esp_hal::{Async, i2c::master::I2c};
+
+#[derive(Clone)]
+pub struct SharedI2C {
+    inner: Option<Rc<Mutex<NoopRawMutex, I2c<'static, Async>>>>,
+}
+
+impl embedded_hal::i2c::ErrorType for SharedI2C {
+    type Error = esp_hal::i2c::master::Error;
+}
+
+impl embedded_hal_async::i2c::I2c for SharedI2C {
+    async fn transaction(
+        &mut self,
+        address: u8,
+        operations: &mut [embedded_hal::i2c::Operation<'_>],
+    ) -> Result<(), Self::Error> {
+        let Some(ref i2c) = self.inner else {
+            return Err(esp_hal::i2c::master::Error::Timeout);
+        };
+
+        i2c.lock().await.transaction(
+            address,
+            operations
+                .iter_mut()
+                .map(esp_hal::i2c::master::Operation::from)
+                .collect::<Vec<_>>()
+                .iter_mut(),
+        )
+    }
+}
+
+impl SharedI2C {
+    pub fn new(i2c: Option<I2c<'static, Async>>) -> Self {
+        match i2c {
+            Some(i2c) => SharedI2C {
+                inner: Some(Rc::new(Mutex::new(i2c))),
+            },
+            None => SharedI2C { inner: None },
+        }
+    }
+}
diff --git a/src/utils/stackmat.rs b/src/utils/stackmat.rs
index d48a2be..8d2b623 100644
--- a/src/utils/stackmat.rs
+++ b/src/utils/stackmat.rs
@@ -1,4 +1,6 @@
+#[cfg(feature = "v3")]
 pub const DEC_DIGITS: [u8; 10] = [215, 132, 203, 206, 156, 94, 95, 196, 223, 222];
+#[cfg(feature = "v3")]
 pub const DOT_MOD: u8 = 32;
 
 pub fn parse_stackmat_data(data: &[u8; 8]) -> Result<(StackmatTimerState, u64), ()> {
@@ -84,6 +86,7 @@ pub fn generate_stackmat_data(state: &StackmatTimerState, time_ms: u64) -> [u8;
     data
 }
 
+#[cfg(feature = "v3")]
 pub fn time_str_to_display(time: &str) -> [u8; 6] {
     let mut data = [255; 6];
     let mut i = 0;
diff --git a/src/ws.rs b/src/ws.rs
index 409fc42..12c97a4 100644
--- a/src/ws.rs
+++ b/src/ws.rs
@@ -143,7 +143,7 @@ async fn ws_loop(
         if let Err(e) = r {
             // but if wifi conneceted signal was sent remove wifi connection lost msg
             if wifi_conn_sig.signaled() && wifi_conn_sig.wait().await {
-                global_state.state.lock().await.wifi_conn_lost = false;
+                global_state.state.lock().await.wifi_connected = Some(true);
             }
 
             log::error!("connect error: {e:?}");
@@ -175,7 +175,7 @@ async fn ws_loop(
         {
             let mut state = global_state.state.lock().await;
             state.server_connected = Some(true);
-            state.wifi_conn_lost = false; // reset conn lost flag
+            state.wifi_connected = Some(true);
         }
 
         log::info!("connected!");
@@ -355,7 +355,7 @@ async fn ws_rw(
                     continue;
                 }
 
-                global_state.state.lock().await.wifi_conn_lost = true;
+                global_state.state.lock().await.wifi_connected = Some(false);
                 log::error!("Wifi disconnected, ws_rw stop.");
                 return Err(WsRwError::WifiDisconnected);
             }