// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.

// This is an example of how to use the DallasTemperature with two temperature
// sensors. For more information see the README.

#include <DallasTemperature.h>
#define RELAY_PIN 3


// Data wire is plugged into port 2 on the Arduino
static const int ONE_WIRE_PIN = 2;
NewOneWire oneWire(ONE_WIRE_PIN);
DallasTemperature tempSensor0(oneWire, 0);
DallasTemperature tempSensor1(oneWire, 1);

void setup(void) {
    // initialize inputs/outputs
    pinMode(RELAY_PIN, OUTPUT);
    // start serial port
    delay(2000);
    Serial.begin(9600);
    clearLCD();
    delay(500);
    Serial.print("Joe's Kegerator");
    selectLineTwo();
    Serial.print("Yup It's Kewl!");
    delay(5000);
    clearLCD();
    tempSensor0.begin();
    tempSensor1.begin();
    
    
    
}

void printId(DallasTemperature &sensor) {
    for (uint8_t i = 0; i < 8; i++) {
        Serial.print(sensor.getSlaveAddr()[i], HEX);
    }
}

void display(DallasTemperature &sensor) {
    // Ask the library whether the device is valid
    
    switch(sensor.isValid())
    {
        case 1:
            Serial.println("Invalid CRC");
            sensor.reset(); // Attempts to redetect IC
            return;
        case 2:
            Serial.println("Not a valid device");
            sensor.reset(); // Attempts to redetect IC
            return;
    }
    
 
    // getTemperature returns a float. 
    float temperature = sensor.getTemperature();     
    Serial.print(DallasTemperature::toFahrenheit(temperature)); // Use the inbuild Celcius to Fahrenheit conversion. Returns a float
    Serial.print("F ");

}

void displaywithrelay(DallasTemperature &sensor) {
    // Ask the library whether the device is valid
    
    switch(sensor.isValid())
    {
        case 1:
            Serial.println("Invalid CRC");
            sensor.reset(); // Attempts to redetect IC
            return;
        case 2:
            Serial.println("Not a valid device");
            sensor.reset(); // Attempts to redetect IC
            return;
    }
    
 
    // getTemperature returns a float. 
    float temperature = sensor.getTemperature();     
    Serial.print(DallasTemperature::toFahrenheit(temperature)); // Use the inbuild Celcius to Fahrenheit conversion. Returns a float
    Serial.print("F ");
    if (DallasTemperature::toFahrenheit(temperature) > 44 ){
      RelayHigh();
      Serial.print("On ");
    }
    if (DallasTemperature::toFahrenheit(temperature) <= 41){
      RelayLow();
      Serial.print("Off");
    }

}

void loop(void) {
    selectLineOne();
    Serial.print("In:  ");
    displaywithrelay(tempSensor0);
    selectLineTwo();
    Serial.print("Out: ");
    display(tempSensor1);
    
}


void RelayHigh(){
 digitalWrite(RELAY_PIN, HIGH);
}

void RelayLow(){
digitalWrite(RELAY_PIN, LOW);
}

void selectLineOne(){  //puts the cursor at line 0 char 0.
   Serial.print(0xFE, BYTE);   //command flag
   Serial.print(128, BYTE);    //position
}
void selectLineTwo(){  //puts the cursor at line 1 char 0.
   Serial.print(0xFE, BYTE);   //command flag
   Serial.print(192, BYTE);    //position
}
void goTo(int position) { //position = line 1: 0-15, line 2: 16-31, 31+ defaults back to 0
if (position<16){ Serial.print(0xFE, BYTE);   //command flag
              Serial.print((position+128), BYTE);    //position
}else if (position<32){Serial.print(0xFE, BYTE);   //command flag
              Serial.print((position+48+128), BYTE);    //position 
} else { goTo(0); }
}

void clearLCD(){
   Serial.print(0xFE, BYTE);   //command flag
   Serial.print(0x01, BYTE);   //clear command.
}
void backlightOn(){  //turns on the backlight
    Serial.print(0x7C, BYTE);   //command flag for backlight stuff
    Serial.print(157, BYTE);    //light level.
}
void backlightOff(){  //turns off the backlight
    Serial.print(0x7C, BYTE);   //command flag for backlight stuff
    Serial.print(128, BYTE);     //light level for off.
}
void serCommand(){   //a general function to call the command flag for issuing all other commands   
  Serial.print(0xFE, BYTE);
}