/* References:
 * https://lastminuteengineers.com/multiple-ds18b20-arduino-tutorial/
*/
#include "ArduinoJson.h"

#include <OneWire.h>
#include <DallasTemperature.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows

// Data wire is conntec to the Arduino digital pin 4
#define ONE_WIRE_BUS 2
#define MOSFET1 3
#define MOSFET2 4
// Setup a oneWire instance to communicate with any OneWire devices
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature sensor 
DallasTemperature sensors(&oneWire);
DeviceAddress Thermometer;
int deviceCount = 0;

int analogPin = 2;
int data = 0;
char userInput;
char* commandVer;
// temperature values in °C 
float tempSensor1;
float tempSensor2;
// HighTemp - when to turn on the power
float HTemp1 = 12.0;
float HTemp2 = 16.0;
// LowTemp - when to turn of the power
float LTemp1 = 10.0;
float LTemp2 = 14.0;
bool fetState1;
bool fetState2;

uint8_t addrSensor1[8] = { 0x28, 0xFF, 0x64, 0x1F, 0x79, 0xD1, 0xB1, 0x75 };
uint8_t addrSensor2[8] = { 0x28, 0xFF, 0x64, 0x1F, 0x79, 0xD7, 0xDA, 0x9A };

void setup() {
  lcd.init(); // initialize the lcd
  lcd.backlight();

  lcd.clear();                 // clear display
  lcd.setCursor(0, 0);         // move cursor to   (0, 0)
  lcd.print("*fridge control*");        // print message at (0, 0)
  lcd.setCursor(0, 1);         // move cursor to   (0, 0)
  lcd.print("    by DeltaLima");
  delay(1500);
  
  // display default values
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("1: H");
  lcd.print(HTemp1);
  lcd.print(" L");
  lcd.print(LTemp1);
    
  lcd.setCursor(0, 1);
  lcd.print("2: H");
  lcd.print(HTemp2);
  lcd.print(" L");
  lcd.print(LTemp2);
  delay(3500);

  // init MOSFET Pins
  pinMode(MOSFET1, OUTPUT);
  pinMode(MOSFET2, OUTPUT);

  Serial.begin(9600);
  sensors.begin();

}

void loop() {
  // get sensor values
  sensors.requestTemperatures(); 

  tempSensor1 = sensors.getTempC(addrSensor1);
  tempSensor2 = sensors.getTempC(addrSensor2);
  
  if(tempSensor1 > HTemp1) {
    digitalWrite(MOSFET1, HIGH);
    fetState1 = 1;
  } else if(tempSensor1 < LTemp1) {
    digitalWrite(MOSFET1, LOW);
    fetState1 = 0;
  }

  if(tempSensor2 > HTemp2) {
    digitalWrite(MOSFET2, HIGH);
    fetState2 = 1;
  } else if(tempSensor1 < LTemp1) {
    digitalWrite(MOSFET2, LOW);
    fetState2 = 0;
  }

  // LCD Display
  lcd.clear();                 
  lcd.setCursor(0, 0);         
  lcd.print("1: ");        
  lcd.print(tempSensor1);
  lcd.print(" ");
  lcd.print((char)223);
  lcd.print("C");
  lcd.setCursor(14,0);
  lcd.print("|");
  lcd.print(fetState1);
  
  lcd.setCursor(0, 1);
  lcd.print("2: ");
  lcd.print(tempSensor2);
  lcd.print(" ");
  lcd.print((char)223);
  lcd.print("C");
  lcd.setCursor(14,1);
  lcd.print("|");  
  lcd.print(fetState2);

    
  // JSON
  StaticJsonDocument<96> jsonOut;
  //jsonOut["sensor"] = "1";
  jsonOut["1"]["temp"] = tempSensor1;
  jsonOut["1"]["state"] = fetState1;

  //jsonOut["sensor"] = "2";
  jsonOut["2"]["temp"] = tempSensor2;
  jsonOut["2"]["state"] = fetState2;
  serializeJson(jsonOut, Serial);
  Serial.println();


  delay(5000);
  
}