Added support for see the Power Consumption

Added support for an Hall Effect sensor to retrieve the current and calulate Wh

MarlinKimbra/temperature.h

@@ -30,7 +30,7 @@
 void tp_init();  //initialize the heating
 void manage_heater(); //it is critical that this is called periodically.
 
-#ifdef FILAMENT_SENSOR
+#if (defined(FILAMENT_SENSOR) && defined(FILWIDTH_PIN) && FILWIDTH_PIN >= 0)
 // For converting raw Filament Width to milimeters 
  float analog2widthFil(); 
  
@@ -38,6 +38,11 @@ void manage_heater(); //it is critical that this is called periodically.
  int widthFil_to_size_ratio();
 #endif
 
+#if (defined(POWER_CONSUMPTION) && defined(POWER_CONSUMPTION_PIN) && POWER_CONSUMPTION_PIN >= 0)
+// For converting raw Power Consumption to watt
+ float analog2power();
+#endif
+
 // low level conversion routines
 // do not use these routines and variables outside of temperature.cpp
 #ifndef SINGLENOZZLE