//20/06/2022 19:38:53
//Car Temperatures
//Arduino UNO, Classic BT using HC-05 module

#include <SoftwareSerial.h>
#include <Wire.h>
#include <DallasTemperature.h>

#define ONE_WIRE_BUS 4
#define TEMPERATURE_PRECISION 10

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

// Addresses of 4 DS18B20s Change these to match temp sensors used

uint8_t sensor1[8] = { 0x28, 0x73, 0x7D, 0x7D, 0x08, 0x00, 0x00, 0x4E };//engine------------sensor #29
uint8_t sensor2[8] = { 0x28, 0x11, 0xAD, 0x6D, 0x08, 0x00, 0x00, 0x85 };//transmission #1---sensor #28
uint8_t sensor3[8] = { 0x28, 0xFF, 0x5F, 0x98, 0xA1, 0x15, 0x04, 0x60 };//transmission #2
uint8_t sensor4[8] = { 0x28, 0xFF, 0x11, 0x57, 0x73, 0x15, 0x01, 0xE1 };//outside

// Bluetooth HC05 module
#define rxPin 10 //HC05 tx
#define txPin 11 //HC05 rx

SoftwareSerial HC05(rxPin, txPin);

float fgTemperature1;
float fgTemperature2;
float fgTemperature3;
float fgTemperature4;

unsigned long lgUpdateTime;

void setup(void)
{
               pinMode(txPin, OUTPUT);

               Serial.begin(9600);
                 HC05.begin(9600);

              sensors.begin();
              sensors.setResolution(sensor1, TEMPERATURE_PRECISION);
              sensors.setResolution(sensor2, TEMPERATURE_PRECISION);

               lgUpdateTime = millis();
}

void loop(void)
{
	           if(millis() - lgUpdateTime > 5000)      //Loop approx every 5 seconds (Tweak this later as required. Note App time interval should be 20% shorter)
               {

                         lgUpdateTime = millis();

                         //Data
                         fgTemperature1 = sensors.getTempF(sensor1);
                         fgTemperature2 = sensors.getTempF(sensor2);
                         fgTemperature3 = sensors.getTempF(sensor3);
                         fgTemperature4 = sensors.getTempF(sensor4);

                         //Output
                         //To PC Arduino Serial Monitor via USB
                         Serial.print("Engine Temp = ");
                         Serial.println(fgTemperature1, 0);
                         Serial.print("Transmission Temp 1 = ");
                         Serial.println(fgTemperature2, 0);
                         Serial.print("Transmission Temp 2 = ");
                         Serial.println(fgTemperature3, 0);
                         Serial.print("Outside Temp = ");
                         Serial.println(fgTemperature4, 0);
                         Serial.println("----------------");

                         //To Android App via Bluetooth HC05
                         HC05.print(fgTemperature1,0);
                         HC05.print("|");
                         HC05.print(fgTemperature2,0);
                         HC05.print("|");
                         HC05.print(fgTemperature3,0);
                         HC05.print("|");
                         HC05.print(fgTemperature4,0);
                         HC05.println();
               }
}