driver.c

 *  SS:   pin 10                                                               
 *  MOSI: pin 11 (NC)                                                          
 *  MISO: pin 12                                                               
 *  SCK:  pin 13                                                               
 *  VCC:  pin 14                                                               
 *  GND:  pin 15                                                               
 *  arduino>>bluetooth
 *  RX:   PIN 2
 *  TX:   PIN 3                                                                
 * Arduino Pro Mini 328 3.3V/8MHz                                              


#include <SoftwareSerial.h>// import the serial library
#include "Adafruit_MAX31855.h"
#include <SPI.h>  // Included here too due Arduino IDE; Used in above header

SoftwareSerial SoftSerial(3, 2); //arduino RX, TX
String BluetoothData;

#define RPin  5
#define GPin  6
#define BPin  9

#define MAXCS   10
Adafruit_MAX31855 thermocouple(MAXCS);

void setup() {
  SoftSerial.begin(19200);
  while (!Serial) {
   delay(1); // wait for serial port to connect
  }
  pinMode(RPin, OUTPUT);
  pinMode(GPin, OUTPUT);
  pinMode(BPin, OUTPUT);
  SoftSerial.println("Software serial over bluetooth starting...\n");
}

void loop() {
  delay(100);
  if(SoftSerial.available()){
    BluetoothData = SoftSerial.readString();
    BluetoothData.trim();
    //SoftSerial.println(BluetoothData);

    if(BluetoothData.equals("readAll")){
      SoftSerial.printf("Internal Temp = %10.0f",(float)thermocouple.readInternal());
      SoftSerial.printf("C = %10.0f",(float)thermocouple.readCelsius());
      SoftSerial.printf("F = %10.0f",(float)thermocouple.readFarenheit());
      
     }
	 else if(BluetoothData.equals("setLed")){
      int RedInt = 0;
      int GreenInt = 0;
      int BlueInt = 0;
      float AlphaFloat = 0.0;
      
      SoftSerial.println("send color like this: 255,255,255,1.0 ");
      
      String RedStr = SoftSerial.readStringUntil(',');
      Serial.read();
      String GreenStr = SoftSerial.readStringUntil(',');
      Serial.read();
      String BlueStr = SoftSerial.readStringUntil(',');
      Serial.read();
      String AlphaStr = SoftSerial.readStringUntil('\0');

      RedInt = RedStr.toInt();
      GreenInt = GreenStr.toInt();
      BlueInt = BlueStr.toInt();
      AlphaFloat = AlphaStr.toFloat();
      
      RedInt = constrain(RedInt, 0, 255);
      GreenInt = constrain(GreenInt, 0, 255);
      BlueInt = constrain(BlueInt, 0, 255);
      AlphaFloat = constrain(AlphaFloat, 0.0, 1.0);
      setLED(RedInt, GreenInt, BlueInt, AlphaFloat);
     }
	 else if(BluetoothData.equals("readC")){
      SoftSerial.printf("C = %10.0f",(float)thermocouple.readCelsius()); 
     }
	 else if(BluetoothData.equals("readF")){
      SoftSerial.printf("F = %10.0f"(float)thermocouple.readFarenheit());
     }
	 else if(BluetoothData.equals("readInternal")){
      SoftSerial.printf("Internal Temp = %10.0f",(float)thermocouple.readInternal());
     }
	 else if(BluetoothData.equals("marco\n")){
      SoftSerial.printf("polo\n");
     }
	 else{
      SoftSerial.printf("I did not understand that\n");
     }
    SoftSerial.printf("send: readAll, readInternal, readC, readF, marco\n");
  }
}
void setLED(int Red, int Green, int Blue, float Alpha )
{
  //SoftSerial.println(Red);
  //SoftSerial.println(Green);
  //SoftSerial.println(Blue);
  //SoftSerial.println(Alpha);
  analogWrite(RPin, (Red * Alpha));
  analogWrite(GPin, (Green * Alpha));
  analogWrite(BPin, (Blue * Alpha));
}