text: //******************************************************************************************
  //  File: PS_10kThermistor.cpp
  //  Authors: D. Johnson (_M2) based on the work of Dan G Ogorchock & Daniel J Ogorchock (Father and Son)
  //
  //  Summary:  PS_10kThermistor is a class which implements the Hubitat "Temperature Measurement" device capability.
  //			  It inherits from the st::PollingSensor class.  The current version uses an analog input to measure the 
  //			  value of a simple thermal resistor using another 10k resistor as a voltage divider.
  //
  //			  The last four arguments of the constructor are used as arguments to configure the resistance of the parts.  
  //			  The first number is the resistance of the thermistor. Second is R1. Third is the thermistor coefficient. Last is your preference of units.
  //			  Create an instance of this class in your sketch's global variable section
  //			  For Example:  st::PS_10kThermistor sensor1(F("temperature1"), 120, 0, PIN_THERMISTOR, 10000, 10000, 3300, "F");
  //
  //			  st::PS_10kThermistor() constructor requires the following arguments
  //				- String &name - REQUIRED - the name of the object - must match the Groovy ST_Anything DeviceType tile name
  //				- long interval - REQUIRED - the polling interval in seconds
  //				- long offset - REQUIRED - the polling interval offset in seconds - used to prevent all polling sensors from executing at the same time
  //				- byte pin - REQUIRED - the Arduino Pin to be used as a digital output
  //				- int tl - OPTIONAL - resistance of the thermocouple at the nominal temperature (usually 25C, 77F)
  //				- int r1 - OPTIONAL - actual measured resistance of the voltage divider resistor
  //				- int BCOEFF - OPTIONAL - The beta coefficient of the thermistor (usually 3000-4000). Tweak this number to calibrate.
  //				- int tempNOM - OPTIONAL - The nominal temperature of the thermistor @10k (usually 25C, 77F).
  //				- int unit - OPTIONAL - Use the letter F for Farhenheit, C for Celsius
  //
  //
  //			  TODO:  Determine a method to persist the ST Cloud's Polling Interval data
  //
  //  Change History:
  //
  //    Date        Who            What
  //    ----        ---            ----
  //    2015-01-03  Dan & Daniel   Original Creation
  //    2017-08-30  Dan Ogorchock  Modified comment section above to comply with new Parent/Child Device Handler requirements
  //	  2019-12-23  D. Johnson	 Created 10k_Thermistor using PS_Illuminance as example
  //
  //******************************************************************************************
  
  #ifndef ST_PS_10KTHERMISTOR_H
  #define ST_PS_10KTHERMISTOR_H
  
  #include "PollingSensor.h"
  
  namespace st
  {
  	class PS_10kThermistor: public PollingSensor
  	{
  		private:
  			byte m_nAnalogInputPin;
  			float m_nSensorValue;
  			int thermResistance;
  			int r1Resistance;
  			int BetaCoeff;
  			int TEMPNOMINAL;
  			char UNIT;
  		public:
  			//constructor - called in your sketch's global variable declaration section
  			PS_10kThermistor(const __FlashStringHelper *name, unsigned int interval, int offset, byte analogInputPin, int t1=10000, int r1=10000, int BCOEFF=3300, int tempNom=25, char unit='F');
  			
  			//destructor
  			virtual ~PS_10kThermistor();
  			
  			//SmartThings Shield data handler (receives configuration data from ST - polling interval, and adjusts on the fly)
  			virtual void beSmart(const String &str);
  
  			//function to get data from sensor and queue results for transfer to ST Cloud 
  			virtual void getData();
  			
  			//gets
  			inline byte getPin() const {return m_nAnalogInputPin;}
  			inline byte getSensorValue() const {return m_nSensorValue;}
  				
  			//sets
  			void setPin(byte pin);
  	};
  }
  #endif
  