diff --git a/.github/workflows/arduino-m5-build-check.yml b/.github/workflows/arduino-m5-build-check.yml
index 54b8e8a..207da75 100644
--- a/.github/workflows/arduino-m5-build-check.yml
+++ b/.github/workflows/arduino-m5-build-check.yml
@@ -96,7 +96,7 @@ jobs:
 #          - m5stack_unit_cams3
 
         platform-version:
-          - 2.1.2
+          - 3.2.1
 
         platform:
           - m5stack
diff --git a/library.json b/library.json
index 635d2e8..170f611 100644
--- a/library.json
+++ b/library.json
@@ -10,13 +10,12 @@
         "type": "git",
         "url": "https://github.com/m5stack/M5Unit-ENV.git"
     },
-    "dependencies":
-    {
-	"m5stack/M5UnitUnified": ">=0.1.0",
-	"boschsensortec/BME68x Sensor library": ">=1.3.40408",
-	"boschsensortec/bsec2": ">=1.10.2610"
+    "dependencies": {
+        "m5stack/M5UnitUnified": ">=0.1.0",
+        "boschsensortec/BME68x Sensor library": ">=1.3.40408",
+        "boschsensortec/bsec2": ">=1.10.2610"
     },
-    "version": "1.3.0",
+    "version": "1.3.1",
     "frameworks": [
         "arduino"
     ],
@@ -31,4 +30,4 @@
             "docs/html"
         ]
     }
-}
+}
\ No newline at end of file
diff --git a/library.properties b/library.properties
index 117ade1..b0930ce 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=M5Unit-ENV
-version=1.3.0
+version=1.3.1
 author=M5Stack
 maintainer=M5Stack
 sentence=Library for M5Stack UNIT ENV
diff --git a/src/unit/unit_BME688.cpp b/src/unit/unit_BME688.cpp
index dd4b4ba..6e3b32e 100644
--- a/src/unit/unit_BME688.cpp
+++ b/src/unit/unit_BME688.cpp
@@ -9,7 +9,10 @@
 */
 #include "unit_BME688.hpp"
 #if defined(UNIT_BME688_USING_BSEC2)
+#pragma message "Using bsec2"
 #include <inc/bsec_interface.h>  // BSEC2
+#else
+#pragma message "Not using bsec2"
 #endif
 #include <M5Utility.hpp>
 #include <array>
diff --git a/src/unit/unit_BME688.hpp b/src/unit/unit_BME688.hpp
index 0ca6228..dff9c50 100644
--- a/src/unit/unit_BME688.hpp
+++ b/src/unit/unit_BME688.hpp
@@ -19,11 +19,7 @@
 #include <bme68x/bme68x.h>
 #endif
 
-#if defined(CONFIG_IDF_TARGET_ESP32C6)
-#pragma message "Not using bsec2"
-
-#else
-#pragma message "Using bsec2"
+#if defined(CONFIG_IDF_TARGET_ESP32) || defined(CONFIG_IDF_TARGET_ESP32S3) || defined(CONFIG_IDF_TARGET_ESP32C3)
 #define UNIT_BME688_USING_BSEC2
 
 #if defined(ARDUINO)
diff --git a/src/unit/unit_SHT30.cpp b/src/unit/unit_SHT30.cpp
index ed1a4f8..a0831de 100644
--- a/src/unit/unit_SHT30.cpp
+++ b/src/unit/unit_SHT30.cpp
@@ -302,7 +302,7 @@ bool UnitSHT30::readSerialNumber(uint32_t& serialNumber)
     }
 
     std::array<uint8_t, 6> rbuf;
-    if (readRegister(GET_SERIAL_NUMBER_ENABLE_STRETCH, rbuf.data(), rbuf.size(), 0)) {
+    if (readRegister(GET_SERIAL_NUMBER_DISABLE_STRETCH, rbuf.data(), rbuf.size(), 1)) {
         m5::types::big_uint16_t u16[2]{{rbuf[0], rbuf[1]}, {rbuf[3], rbuf[4]}};
         m5::utility::CRC8_Checksum crc{};
         if (crc.range(u16[0].data(), u16[0].size()) == rbuf[2] && crc.range(u16[1].data(), u16[1].size()) == rbuf[5]) {