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Add Heltec Wireless Stick Lite V3 (BOARD_HELTEC_WSL_V3 0x43) #44

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c6f7ac2
Add Heltec Wireless Stick Lite V3 board support
Mar 24, 2026
4b8d692
Add Heltec Wireless Stick Lite V3 as dedicated board (BOARD_HELTEC_WS…
slack-t Apr 21, 2026
79f92fa
Fix BOARD_HELTEC_WSL_V3 radio offline: add missing board cases
slack-t Apr 21, 2026
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45 changes: 44 additions & 1 deletion Boards.h
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Original file line number Diff line number Diff line change
Expand Up @@ -95,6 +95,8 @@
#define MODEL_C5 0xC5 // Heltec Lora32 v3, 433 MHz
#define MODEL_CA 0xCA // Heltec Lora32 v3, 868 MHz

#define BOARD_HELTEC_WSL_V3 0x43 // Heltec Wireless Stick Lite V3 (same as V3, no display)

#define PRODUCT_H32_V4 0xC3
#define BOARD_HELTEC32_V4 0x3F
#define MODEL_C8 0xC8 // Heltec Lora32 v3, 850-950 MHz, 28dBm
Expand Down Expand Up @@ -350,7 +352,9 @@

#elif BOARD_MODEL == BOARD_HELTEC32_V3
#define IS_ESP32S3 true
#define HAS_DISPLAY true
#ifndef NO_DISPLAY
#define HAS_DISPLAY true
#endif
#define HAS_WIFI true
#define HAS_BLUETOOTH false
#define HAS_BLE true
Expand Down Expand Up @@ -388,6 +392,45 @@
const int pin_miso = 11;
const int pin_sclk = 9;

#elif BOARD_MODEL == BOARD_HELTEC_WSL_V3
#define IS_ESP32S3 true
#define HAS_DISPLAY false
#define HAS_WIFI true
#define HAS_BLUETOOTH false
#define HAS_BLE true
#define HAS_PMU true
#define HAS_CONSOLE true
#define HAS_EEPROM true
#define HAS_INPUT true
#define HAS_SLEEP true
#define PIN_WAKEUP GPIO_NUM_0
#define WAKEUP_LEVEL 0
#define OCP_TUNED 0x28

const int pin_btn_usr1 = 0;

#if defined(EXTERNAL_LEDS)
const int pin_led_rx = 13;
const int pin_led_tx = 14;
#else
const int pin_led_rx = 35;
const int pin_led_tx = 35;
#endif

#define MODEM SX1262
#define HAS_TCXO true
const int pin_tcxo_enable = -1;
#define HAS_BUSY true
#define DIO2_AS_RF_SWITCH true

const int pin_cs = 8;
const int pin_busy = 13;
const int pin_dio = 14;
const int pin_reset = 12;
const int pin_mosi = 10;
const int pin_miso = 11;
const int pin_sclk = 9;

#elif BOARD_MODEL == BOARD_HELTEC32_V4
#define IS_ESP32S3 true
#define HAS_DISPLAY true
Expand Down
10 changes: 5 additions & 5 deletions Power.h
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Original file line number Diff line number Diff line change
Expand Up @@ -100,7 +100,7 @@ float pmu_temperature = PMU_TEMP_MIN-1;
bool bat_voltage_dropping = false;
float bat_delay_v = 0;
float bat_state_change_v = 0;
#elif BOARD_MODEL == BOARD_HELTEC32_V3
#elif BOARD_MODEL == BOARD_HELTEC32_V3 || BOARD_MODEL == BOARD_HELTEC_WSL_V3
// Unless we implement some real voodoo
// on these boards, we can't say with
// any certainty whether we are actually
Expand Down Expand Up @@ -202,15 +202,15 @@ void measure_temperature() {
}

void measure_battery() {
#if BOARD_MODEL == BOARD_RNODE_NG_21 || BOARD_MODEL == BOARD_LORA32_V2_1 || BOARD_MODEL == BOARD_HELTEC32_V3 || BOARD_MODEL == BOARD_HELTEC32_V4 || BOARD_MODEL == BOARD_TDECK || BOARD_MODEL == BOARD_T3S3 || BOARD_MODEL == BOARD_HELTEC_T114 || BOARD_MODEL == BOARD_TECHO
#if BOARD_MODEL == BOARD_RNODE_NG_21 || BOARD_MODEL == BOARD_LORA32_V2_1 || BOARD_MODEL == BOARD_HELTEC32_V3 || BOARD_MODEL == BOARD_HELTEC_WSL_V3 || BOARD_MODEL == BOARD_HELTEC32_V4 || BOARD_MODEL == BOARD_TDECK || BOARD_MODEL == BOARD_T3S3 || BOARD_MODEL == BOARD_HELTEC_T114 || BOARD_MODEL == BOARD_TECHO
battery_installed = true;
#if BOARD_MODEL == BOARD_HELTEC32_V3 || BOARD_MODEL == BOARD_HELTEC32_V4
#if BOARD_MODEL == BOARD_HELTEC32_V3 || BOARD_MODEL == BOARD_HELTEC_WSL_V3 || BOARD_MODEL == BOARD_HELTEC32_V4
battery_indeterminate = false;
#else
battery_indeterminate = true;
#endif

#if BOARD_MODEL == BOARD_HELTEC32_V3
#if BOARD_MODEL == BOARD_HELTEC32_V3 || BOARD_MODEL == BOARD_HELTEC_WSL_V3
float battery_measurement = (float)(analogRead(pin_vbat)) * 0.0041;
#elif BOARD_MODEL == BOARD_HELTEC32_V4
float battery_measurement = (float)(analogRead(pin_vbat)) * 0.00418;
Expand Down Expand Up @@ -414,7 +414,7 @@ bool init_pmu() {
#if BOARD_MODEL == BOARD_RNODE_NG_21 || BOARD_MODEL == BOARD_LORA32_V2_1 || BOARD_MODEL == BOARD_TDECK || BOARD_MODEL == BOARD_T3S3 || BOARD_MODEL == BOARD_TECHO
pinMode(pin_vbat, INPUT);
return true;
#elif BOARD_MODEL == BOARD_HELTEC32_V3
#elif BOARD_MODEL == BOARD_HELTEC32_V3 || BOARD_MODEL == BOARD_HELTEC_WSL_V3
// there are three version of V3: V3, V3.1, and V3.2
// V3 and V3.1 have a pull up on pin_ctrl and are active low
// V3.2 has a transistor and active high
Expand Down
4 changes: 2 additions & 2 deletions Utilities.h
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Original file line number Diff line number Diff line change
Expand Up @@ -303,7 +303,7 @@ extern RNS::Reticulum reticulum;
void led_id_on() { }
void led_id_off() { }
#endif
#elif BOARD_MODEL == BOARD_HELTEC32_V3
#elif BOARD_MODEL == BOARD_HELTEC32_V3 || BOARD_MODEL == BOARD_HELTEC_WSL_V3
void led_rx_on() { digitalWrite(pin_led_rx, HIGH); }
void led_rx_off() { digitalWrite(pin_led_rx, LOW); }
void led_tx_on() { digitalWrite(pin_led_tx, HIGH); }
Expand Down Expand Up @@ -1707,7 +1707,7 @@ bool eeprom_model_valid() {
if (model == MODEL_B4 || model == MODEL_B9) {
#elif BOARD_MODEL == BOARD_HELTEC32_V2
if (model == MODEL_C4 || model == MODEL_C9) {
#elif BOARD_MODEL == BOARD_HELTEC32_V3
#elif BOARD_MODEL == BOARD_HELTEC32_V3 || BOARD_MODEL == BOARD_HELTEC_WSL_V3
if (model == MODEL_C5 || model == MODEL_CA) {
#elif BOARD_MODEL == BOARD_HELTEC32_V4
if (model == MODEL_C8) {
Expand Down
2 changes: 2 additions & 0 deletions extra_script.py
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Original file line number Diff line number Diff line change
Expand Up @@ -89,6 +89,8 @@ def device_provision(env):
env.Execute("rnodeconf --product e0 --model e9 --hwrev 1 --rom " + env.subst("$UPLOAD_PORT"))
case "lora32v21" | "lora32v21_local":
env.Execute("rnodeconf --product b1 --model b9 --hwrev 1 --rom " + env.subst("$UPLOAD_PORT"))
case "heltec32v3" | "heltec32v3_local" | "heltec32v3_wsl":
env.Execute("rnodeconf --product c1 --model ca --hwrev 1 --rom " + env.subst("$UPLOAD_PORT"))
case "heltec32v4pa" | "heltec32v4pa_local":
env.Execute("rnodeconf --product c3 --model c8 --hwrev 1 --rom " + env.subst("$UPLOAD_PORT"))
case "rak4631" | "rak4631_local":
Expand Down
25 changes: 25 additions & 0 deletions platformio.ini
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Original file line number Diff line number Diff line change
Expand Up @@ -539,6 +539,31 @@ lib_deps =
https://github.com/attermann/microStore.git
https://github.com/attermann/microReticulum.git

; Heltec Wireless Stick Lite V3 (HTIT-WSL_V3)
; Same as Heltec WiFi LoRa 32 V3 but without OLED display
; ESP32-S3FN8 + SX1262
; SRAM: 512 KB
; Flash: 8 MB
; LoRa: Semtech SX1262
[env:heltec_wireless_stick_lite_V3]
platform = espressif32
board = heltec_wifi_lora_32_V3
custom_variant = heltec32v3_wsl
board_build.partitions = no_ota.csv
board_build.filesystem = littlefs
build_flags =
${env.build_flags}
-DBOARD_MODEL=BOARD_HELTEC_WSL_V3
-DUSTORE_USE_POSIXFS=1
-DURTN_PATH_TABLE_MAX_RECS=500
-DRNS_PATH_TABLE_SEGMENT_SIZE=24576
-DRNS_PATH_TABLE_SEGMENT_COUNT=8
lib_deps =
${env.lib_deps}
XPowersLib@^0.2.1
https://github.com/attermann/microStore.git
https://github.com/attermann/microReticulum.git

; ESP32-S3 (ESP32-S3R2 Xtensa 32-bit LX7 dual-core, 240MHz)
; SRAM: 512 KB
; PSRAM: 2 MB
Expand Down
4 changes: 2 additions & 2 deletions sx126x.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -134,7 +134,7 @@ bool sx126x::preInit() {
pinMode(_ss, OUTPUT);
digitalWrite(_ss, HIGH);

#if BOARD_MODEL == BOARD_T3S3 || BOARD_MODEL == BOARD_HELTEC32_V3 || BOARD_MODEL == BOARD_HELTEC32_V4 || BOARD_MODEL == BOARD_TDECK || BOARD_MODEL == BOARD_XIAO_S3
#if BOARD_MODEL == BOARD_T3S3 || BOARD_MODEL == BOARD_HELTEC32_V3 || BOARD_MODEL == BOARD_HELTEC_WSL_V3 || BOARD_MODEL == BOARD_HELTEC32_V4 || BOARD_MODEL == BOARD_TDECK || BOARD_MODEL == BOARD_XIAO_S3
SPI.begin(pin_sclk, pin_miso, pin_mosi, pin_cs);
#elif BOARD_MODEL == BOARD_TECHO
SPI.setPins(pin_miso, pin_sclk, pin_mosi);
Expand Down Expand Up @@ -696,7 +696,7 @@ void sx126x::sleep() { uint8_t byte = 0x00; executeOpcode(OP_SLEEP_6X, &byte, 1)

void sx126x::enableTCXO() {
#if HAS_TCXO
#if BOARD_MODEL == BOARD_RAK4631 || BOARD_MODEL == BOARD_HELTEC32_V3 || BOARD_MODEL == BOARD_XIAO_S3
#if BOARD_MODEL == BOARD_RAK4631 || BOARD_MODEL == BOARD_HELTEC32_V3 || BOARD_MODEL == BOARD_HELTEC_WSL_V3 || BOARD_MODEL == BOARD_XIAO_S3
uint8_t buf[4] = {MODE_TCXO_3_3V_6X, 0x00, 0x00, 0xFF};
#elif BOARD_MODEL == BOARD_TBEAM
uint8_t buf[4] = {MODE_TCXO_1_8V_6X, 0x00, 0x00, 0xFF};
Expand Down