Merge pull request #486 from meshtastic/RCWL-9620

Support RCWL-9620

meshtastic/telemetry.proto

@@ -77,6 +77,11 @@ message EnvironmentMetrics {
    * Belongs to Air Quality but is not particle but VOC measurement. Other VOC values can also be put in here.
    */
   uint32 iaq = 7;
+
+  /*
+   * RCWL9620 Doppler Radar Distance Sensor, used for water level detection. Float value in mm.
+   */
+  float water_level = 8;
 }
 
 /*
@@ -294,4 +299,9 @@ enum TelemetrySensorType {
    * BMP085/BMP180 High accuracy temperature and pressure (older Version of BMP280)
    */
   BMP085 = 15;
+
+  /*
+   * RCWL-9620 Doppler Radar Distance Sensor, used for water level detection
+   */
+  RCWL9620 = 16;
 }