Revert "Revert "Add Sensirion SHT4X sensors (#3792)" (#3845)" (#3850)

This reverts commit 5d9800b7c2.

src/modules/Telemetry/EnvironmentTelemetry.cpp

@@ -26,6 +26,7 @@
 #include "Sensor/MCP9808Sensor.h"
 #include "Sensor/RCWL9620Sensor.h"
 #include "Sensor/SHT31Sensor.h"
+#include "Sensor/SHT4XSensor.h"
 #include "Sensor/SHTC3Sensor.h"
 
 BMP085Sensor bmp085Sensor;
@@ -36,6 +37,7 @@ MCP9808Sensor mcp9808Sensor;
 SHTC3Sensor shtc3Sensor;
 LPS22HBSensor lps22hbSensor;
 SHT31Sensor sht31Sensor;
+SHT4XSensor sht4xSensor;
 RCWL9620Sensor rcwl9620Sensor;
 
 #define FAILED_STATE_SENSOR_READ_MULTIPLIER 10
@@ -91,6 +93,8 @@ int32_t EnvironmentTelemetryModule::runOnce()
                 result = lps22hbSensor.runOnce();
             if (sht31Sensor.hasSensor())
                 result = sht31Sensor.runOnce();
+            if (sht4xSensor.hasSensor())
+                result = sht4xSensor.runOnce();
             if (ina219Sensor.hasSensor())
                 result = ina219Sensor.runOnce();
             if (ina260Sensor.hasSensor())
@@ -246,6 +250,8 @@ bool EnvironmentTelemetryModule::sendTelemetry(NodeNum dest, bool phoneOnly)
 
     if (sht31Sensor.hasSensor())
         valid = sht31Sensor.getMetrics(&m);
+    if (sht4xSensor.hasSensor())
+        valid = sht4xSensor.getMetrics(&m);
     if (lps22hbSensor.hasSensor())
         valid = lps22hbSensor.getMetrics(&m);
     if (shtc3Sensor.hasSensor())

src/modules/Telemetry/Sensor/SHT4XSensor.cpp

@@ -0,0 +1,63 @@
+#include "configuration.h"
+
+#if !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR
+
+#include "../mesh/generated/meshtastic/telemetry.pb.h"
+#include "SHT4XSensor.h"
+#include "TelemetrySensor.h"
+#include <SensirionI2cSht4x.h>
+
+// macro definitions
+// make sure that we use the proper definition of NO_ERROR
+#ifdef NO_ERROR
+#undef NO_ERROR
+#endif
+#define NO_ERROR 0
+
+static char errorMessage[64];
+static int16_t error;
+
+SHT4XSensor::SHT4XSensor() : TelemetrySensor(meshtastic_TelemetrySensorType_SHT4X, "SHT4X") {}
+
+int32_t SHT4XSensor::runOnce()
+{
+    LOG_INFO("Init sensor: %s\n", sensorName);
+    if (!hasSensor()) {
+        return DEFAULT_SENSOR_MINIMUM_WAIT_TIME_BETWEEN_READS;
+    }
+
+    uint32_t serialNumber = 0;
+
+    sht4x.begin(*nodeTelemetrySensorsMap[sensorType].second, 0x44);
+
+    error = sht4x.serialNumber(serialNumber);
+    LOG_DEBUG("serialNumber : %x\n", serialNumber);
+    if (error != NO_ERROR) {
+        LOG_DEBUG("Error trying to execute serialNumber(): ");
+        errorToString(error, errorMessage, sizeof errorMessage);
+        LOG_DEBUG(errorMessage);
+        status = 0;
+    } else {
+        status = 1;
+    }
+
+    return initI2CSensor();
+}
+
+void SHT4XSensor::setup()
+{
+    // Set up oversampling and filter initialization
+}
+
+bool SHT4XSensor::getMetrics(meshtastic_Telemetry *measurement)
+{
+    float aTemperature = 0.0;
+    float aHumidity = 0.0;
+    sht4x.measureLowestPrecision(aTemperature, aHumidity);
+    measurement->variant.environment_metrics.temperature = aTemperature;
+    measurement->variant.environment_metrics.relative_humidity = aHumidity;
+
+    return true;
+}
+
+#endif

src/modules/Telemetry/Sensor/SHT4XSensor.h

@@ -0,0 +1,23 @@
+#include "configuration.h"
+
+#if !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR
+
+#include "../mesh/generated/meshtastic/telemetry.pb.h"
+#include "TelemetrySensor.h"
+#include <SensirionI2cSht4x.h>
+
+class SHT4XSensor : public TelemetrySensor
+{
+  private:
+    SensirionI2cSht4x sht4x;
+
+  protected:
+    virtual void setup() override;
+
+  public:
+    SHT4XSensor();
+    virtual int32_t runOnce() override;
+    virtual bool getMetrics(meshtastic_Telemetry *measurement) override;
+};
+
+#endif