added method to change sensor address

Author: gigapod

src/sfeTk/sfeDevSoilMoisture.cpp

@@ -72,3 +72,17 @@ uint16_t sfeDevSoilMoisture::readMoistureValue(void)
 
     return value;
 }
+
+//----------------------------------------------------------------------------------------
+sfeTkError_t sfeDevSoilMoisture::changeSensorAddress(uint8_t newAddress)
+{
+    if (_theBus == nullptr)
+        return kSTkErrFail;
+
+    // Validate the new address
+    if (newAddress < 0x07 || newAddress > 0x78)
+        return kSTkErrFail;
+
+    // Send the command to change the address
+    return _theBus->writeRegisterByte(kCommandChangeAddress, newAddress);
+}

src/sfeTk/sfeDevSoilMoisture.h

@@ -43,6 +43,11 @@ class sfeDevSoilMoisture
     /// @return The moisture value - a resistance reading between 0 and 1023
     uint16_t readMoistureValue(void);
 
+    /// @brief Changes the I2C address of the sensor
+    /// @param newAddress The new I2C address to assign to the sensor
+    /// @return kSTkErrOk if successful, otherwise an error code
+    sfeTkError_t changeSensorAddress(uint8_t newAddress);
+
   protected:
     // The I2C bus the sensor is connected to
     sfeTkII2C *_theBus;