Extend ADC Plugin with multiplex and powersave

If none of the 2 GPIO pins is set it works as usual and the value get
written in "Analog1". If one or both GPIO pins are set the pin is set to
HIGH while reading A0. This way 2 analog sensors are possible. The
positive source for the sensor is 1st GPIO for Analog1 and 2nd GPIO for
Analog2. It's also possible to set only one of the both GPIO. In this
case it works like a powersave because the sensor only get voltage for
the short moment of measure.

_P002_ADC.ino

@@ -5,7 +5,8 @@
 #define PLUGIN_002
 #define PLUGIN_ID_002         2
 #define PLUGIN_NAME_002       "Analog input"
-#define PLUGIN_VALUENAME1_002 "Analog"
+#define PLUGIN_VALUENAME1_002 "Analog1"
+#define PLUGIN_VALUENAME2_002 "Analog2"
 boolean Plugin_002(byte function, struct EventStruct *event, String& string)
 {
   boolean success = false;
@@ -16,13 +17,13 @@ boolean Plugin_002(byte function, struct EventStruct *event, String& string)
     case PLUGIN_DEVICE_ADD:
       {
         Device[++deviceCount].Number = PLUGIN_ID_002;
-        Device[deviceCount].Type = DEVICE_TYPE_ANALOG;
-        Device[deviceCount].VType = SENSOR_TYPE_SINGLE;
+        Device[deviceCount].Type = DEVICE_TYPE_DUAL;
+        Device[deviceCount].VType = SENSOR_TYPE_DUAL;
         Device[deviceCount].Ports = 0;
         Device[deviceCount].PullUpOption = false;
         Device[deviceCount].InverseLogicOption = false;
         Device[deviceCount].FormulaOption = true;
-        Device[deviceCount].ValueCount = 1;
+        Device[deviceCount].ValueCount = 2;
         Device[deviceCount].SendDataOption = true;
         Device[deviceCount].TimerOption = true;
         Device[deviceCount].GlobalSyncOption = true;
@@ -38,18 +39,60 @@ boolean Plugin_002(byte function, struct EventStruct *event, String& string)
     case PLUGIN_GET_DEVICEVALUENAMES:
       {
         strcpy_P(ExtraTaskSettings.TaskDeviceValueNames[0], PSTR(PLUGIN_VALUENAME1_002));
+        strcpy_P(ExtraTaskSettings.TaskDeviceValueNames[1], PSTR(PLUGIN_VALUENAME2_002));
         break;
       }
 
     case PLUGIN_READ:
       {
-        int value = analogRead(A0);
-        UserVar[event->BaseVarIndex] = (float)value;
-        String log = F("ADC  : Analog value: ");
-        log += value;
-        addLog(LOG_LEVEL_INFO,log);
-        success = true;
-        break;
+        int value;
+        if (Settings.TaskDevicePin1[event->TaskIndex] == -1 && Settings.TaskDevicePin2[event->TaskIndex] == -1)
+        {
+          value = analogRead(A0);
+          UserVar[event->BaseVarIndex] = (float)value;
+          String log = F("ADC  : Analog value: ");
+          log += value;
+          addLog(LOG_LEVEL_INFO,log);
+          UserVar[event->BaseVarIndex+1] = 0;
+          success = true;
+          break;
+        }
+        else
+        {
+          if(Settings.TaskDevicePin1[event->TaskIndex] > -1)
+          {
+            pinMode(Settings.TaskDevicePin1[event->TaskIndex], OUTPUT);
+            digitalWrite(Settings.TaskDevicePin1[event->TaskIndex], 1);
+            value = analogRead(A0);
+            digitalWrite(Settings.TaskDevicePin1[event->TaskIndex], 0);
+            UserVar[event->BaseVarIndex] = (float)value;
+            String log = F("ADC  : Analog value1: ");
+            log += value;
+            addLog(LOG_LEVEL_INFO,log);
+          }
+          else
+          {
+            UserVar[event->BaseVarIndex] = 0;
+          }
+
+          if(Settings.TaskDevicePin2[event->TaskIndex] > -1)
+          {
+            pinMode(Settings.TaskDevicePin2[event->TaskIndex], OUTPUT);
+            digitalWrite(Settings.TaskDevicePin2[event->TaskIndex], 1);
+            value = analogRead(A0);
+            digitalWrite(Settings.TaskDevicePin2[event->TaskIndex], 0);
+            UserVar[event->BaseVarIndex+1] = (float)value;
+            String log = F("ADC  : Analog value2: ");
+            log += value;
+            addLog(LOG_LEVEL_INFO,log);
+          }
+          else
+          {
+            UserVar[event->BaseVarIndex+1] = 0;
+          }
+          success = true;
+          break;
+        }
       }
   }
   return success;