Added support for returning temperature in Freedom Units, removed I2C hardware init in class constructor

*that's fahrenheit for all ya non-yanks.

Author: fischermoseley

examples/Example3_SetFilterCoeffecients/Example3_SetFilterCoeffecients.ino

@@ -38,6 +38,8 @@ void setup(){
     //check if the Device ID is correct
     if(tempSensor.checkDeviceID()){
         Serial.println("Device ID is correct!");
+        Serial.print("Device ID reported as: 0x");
+        Serial.println(tempSensor.readDoubleRegister(DEVICE_ID), HEX);
     }
     else {
         Serial.println("Device ID is not correct! Freezing.");

src/SparkFun_MCP9600.cpp

@@ -30,8 +30,6 @@ Distributed as-is; no warranty is given.
 MCP9600::MCP9600(uint8_t address, TwoWire &wirePort){
   _deviceAddress = address; //grab the address that the sensor is on
   _i2cPort = &wirePort; //grab the port that the user wants to use
-  _i2cPort->begin();
-  _i2cPort->setClock(10000);
 }
 
 
@@ -53,19 +51,22 @@ bool MCP9600::checkDeviceID(){
 
 /*----------------------------- Sensor Measurements ---------------------*/
 
-float MCP9600::thermocoupleTemp(){
+float MCP9600::thermocoupleTemp(bool units){
   int16_t raw = readDoubleRegister(HOT_JUNC_TEMP);
-  return ((float)raw * DEV_RESOLUTION);
+  float celcius = ((float)raw * DEV_RESOLUTION);
+  units ? return celcius; : return (((float)celcius * 1.8f) + 32);
 }
 
-float MCP9600::ambientTemp(){
+float MCP9600::ambientTemp(bool units){
   int16_t raw = readDoubleRegister(COLD_JUNC_TEMP);
-  return ((float)raw * DEV_RESOLUTION);
+  float celcius = ((float)raw * DEV_RESOLUTION);
+  units ? return celcius; : return (((float)celcius * 1.8f) + 32);
 }
 
-float MCP9600::tempDelta(){
+float MCP9600::tempDelta(bool units){
   int16_t raw = readDoubleRegister(DELTA_JUNC_TEMP);
-  return ((float)raw * DEV_RESOLUTION);
+  float celcius = ((float)raw * DEV_RESOLUTION);
+  units ? return celcius; : return (((float)celcius * 1.8f) + 32);
 }
 
 signed long MCP9600::rawADC(){

src/SparkFun_MCP9600.h

@@ -106,9 +106,9 @@ class MCP9600{
   bool resetToDefaults();                                           //Resets all device parameters to their default values. Returns 1 if there was an error, zero otherwise.
 
   //Sensor measurements
-  float thermocoupleTemp();                                         //Returns the thermocouple temperature in degrees Celcius
-  float ambientTemp();                                              //Returns the ambient (IC die) temperature in degrees Celcius
-  float tempDelta();                                                //Returns the difference in temperature between the thermocouple and ambient junctions, in degrees Celcius
+  float thermocoupleTemp(bool units = true);                        //Returns the thermocouple temperature. Set units to true for Celcius, or false for freedom units (Fahrenheit)
+  float ambientTemp(bool units = true);                             //Returns the ambient (IC die) temperature. Set units to true for Celcius, or false for freedom units (Fahrenheit)
+  float tempDelta(bool units = true);                               //Returns the difference in temperature between the thermocouple and ambient junctions. Set units to true for Celcius, or false for freedom units (Fahrenheit)
   signed long rawADC();                                             //Returns the raw contents of the raw ADC register
   bool inputRangeExceeded();                                        //Returns true if the MCP9600's EMF range has been exceeded, and false otherwise.