Add support for Grove sensor SHT31

platformio.ini

@@ -125,6 +125,7 @@ build_flags =
   -D ENV_INCLUDE_BME280=1
   -D ENV_INCLUDE_BMP280=1
   -D ENV_INCLUDE_SHTC3=1
+  -D ENV_INCLUDE_SHT31=1
   -D ENV_INCLUDE_SHT4X=1
   -D ENV_INCLUDE_LPS22HB=1
   -D ENV_INCLUDE_INA3221=1
@@ -144,6 +145,7 @@ lib_deps =
   adafruit/Adafruit BME280 Library @ ^2.3.0
   adafruit/Adafruit BMP280 Library @ ^2.6.8
   adafruit/Adafruit SHTC3 Library @ ^1.0.1
+  adafruit/Adafruit SHT31 Library @ ^2.2.2
   sensirion/Sensirion I2C SHT4x @ ^1.1.2
   arduino-libraries/Arduino_LPS22HB @ ^1.0.2
   adafruit/Adafruit MLX90614 Library @ ^2.1.5

src/helpers/sensors/EnvironmentSensorManager.cpp

@@ -50,6 +50,14 @@ static Adafruit_BMP280 BMP280(TELEM_WIRE);
 static Adafruit_SHTC3 SHTC3;
 #endif
 
+#if ENV_INCLUDE_SHT31
+#ifndef TELEM_SHT31_ADDRESS
+#define TELEM_SHT31_ADDRESS    0x44      // SHT31 environmental sensor I2C address
+#endif
+#include <Adafruit_SHT31.h>
+static Adafruit_SHT31 SHT31;
+#endif
+
 #if ENV_INCLUDE_SHT4X
 #define TELEM_SHT4X_ADDRESS 0x44  //0x44 - 0x46
 #include <SensirionI2cSht4x.h>
@@ -240,6 +248,16 @@ bool EnvironmentSensorManager::begin() {
   }
   #endif
 
+  #if ENV_INCLUDE_SHT31
+  if (SHT31.begin(TELEM_SHT31_ADDRESS)) {
+    MESH_DEBUG_PRINTLN("Found sensor: SHT31");
+    SHT31_initialized = true;
+  } else {
+    SHT31_initialized = false;
+    MESH_DEBUG_PRINTLN("SHT31 was not found at I2C address %02X", TELEM_SHT31_ADDRESS);
+  }
+  #endif
+
 
   #if ENV_INCLUDE_SHT4X
   SHT4X.begin(*TELEM_WIRE, TELEM_SHT4X_ADDRESS);
@@ -417,6 +435,16 @@ bool EnvironmentSensorManager::querySensors(uint8_t requester_permissions, Cayen
     }
     #endif
 
+    #if ENV_INCLUDE_SHT31
+    if (SHT31_initialized) {
+      float temp, humidity;
+      SHT31.readBoth(&temp, &humidity);
+
+      telemetry.addTemperature(TELEM_CHANNEL_SELF, temp);
+      telemetry.addRelativeHumidity(TELEM_CHANNEL_SELF, humidity);
+    }
+    #endif
+
     #if ENV_INCLUDE_SHT4X
     if (SHT4X_initialized) {
       float sht4x_humidity, sht4x_temperature;

src/helpers/sensors/EnvironmentSensorManager.h

@@ -16,6 +16,7 @@ class EnvironmentSensorManager : public SensorManager {
   bool INA260_initialized = false;
   bool INA226_initialized = false;
   bool SHTC3_initialized = false;
+  bool SHT31_initialized = false;
   bool LPS22HB_initialized = false;
   bool MLX90614_initialized = false;
   bool VL53L0X_initialized = false;