Adde rain/soil moisture sensor. Updated documentation (#123)

* Added new sensors, updated docs

* Added SensorRain

* Added SensorSoilMoisture

* Updated docs with how to contribute instructions

NodeManager.cpp

@@ -673,6 +673,36 @@ void SensorRainGauge::onReceive(const MyMessage & message) {
   }
 }
 
+/*
+   SensorRain
+*/
+
+// contructor
+SensorRain::SensorRain(int child_id, int pin): SensorAnalogInput(child_id, pin) {
+  // set presentation and type and reverse
+  setPresentation(S_RAIN);
+  setType(V_RAINRATE);
+  setReference(DEFAULT);
+  setOutputPercentage(true);
+  setReverse(true);
+  setRangeMin(100);
+}
+
+/*
+   SensorSoilMoisture
+*/
+
+// contructor
+SensorSoilMoisture::SensorSoilMoisture(int child_id, int pin): SensorAnalogInput(child_id, pin) {
+  // set presentation and type and reverse
+  setPresentation(S_MOISTURE);
+  setType(V_LEVEL);
+  setReference(DEFAULT);
+  setOutputPercentage(true);
+  setReverse(true);
+  setRangeMin(100);
+}
+
 
 /*
  * SensorMQ
@@ -1935,6 +1965,8 @@ int NodeManager::registerSensor(int sensor_type, int pin, int child_id) {
     else if (sensor_type == SENSOR_ML8511) return registerSensor(new SensorML8511(child_id, pin));
     else if (sensor_type == SENSOR_ACS712) return registerSensor(new SensorACS712(child_id, pin));
     else if (sensor_type == SENSOR_RAIN_GAUGE) return registerSensor(new SensorRainGauge(child_id, pin));
+    else if (sensor_type == SENSOR_RAIN) return registerSensor(new SensorRain(child_id, pin));
+    else if (sensor_type == SENSOR_SOIL_MOISTURE) return registerSensor(new SensorSoilMoisture(child_id, pin));
   #endif
   #if MODULE_DIGITAL_INPUT == 1
     else if (sensor_type == SENSOR_DIGITAL_INPUT) return registerSensor(new SensorDigitalInput(child_id, pin));

NodeManager.h

@@ -175,6 +175,10 @@ enum supported_sensors {
     SENSOR_ACS712,
     // rain gauge sensor
     SENSOR_RAIN_GAUGE,
+    // Rain sensor, return the percentage of rain from an attached analog sensor
+    SENSOR_RAIN,
+    // Soil moisture sensor, return the percentage of moisture from an attached analog sensor
+    SENSOR_SOIL_MOISTURE,
   #endif
   #if MODULE_DIGITAL_INPUT == 1
     // Generic digital sensor, return a pin's digital value
@@ -603,6 +607,22 @@ class SensorRainGauge: public Sensor {
     long _last_report = 0;
 };
 
+/*
+   SensorRain
+*/
+class SensorRain: public SensorAnalogInput {
+  public:
+    SensorRain(int child_id, int pin);
+};
+
+/*
+   SensorSoilMoisture
+*/
+class SensorSoilMoisture: public SensorAnalogInput {
+  public:
+    SensorSoilMoisture(int child_id, int pin);
+};
+
 /*
    SensorDigitalInput: read the digital input of the configured pin
 */

NodeManager.ino

@@ -34,7 +34,7 @@ void before() {
    * Register below your sensors
   */
   
-
+  
   
   /*
    * Register above your sensors