#include <LiquidCrystal_I2C.h>
#include <DHT.h>

// Define pins
const int IR1 = 8, IR2 = 12, IR3 = 2, LDR = 7, led1 = 3, led2 = 5, led3 = 6;

// Define variables 
int val1, val2, val3, val4;
int brit = 70; // Brightness

// LCD initialization: 16 columns and 2 rows, I2C address 0x27 and 0x26
LiquidCrystal_I2C lcd1(0x27, 16, 2);
LiquidCrystal_I2C lcd2(0x26, 16, 2);

// Initialize DHT sensor
#define DHTPIN A0     // Analog pin connected to the DHT sensor
#define DHTTYPE DHT22   // DHT 22
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  // Initialize pins
  pinMode(IR1, INPUT);
  pinMode(IR2, INPUT);
  pinMode(IR3, INPUT);
  pinMode(LDR, INPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  
  // Initialize serial communication
  Serial.begin(9600);

  // Initialize the first LCD
  lcd1.init();
  lcd1.backlight();

  // Initialize the second LCD
  lcd2.init();
  lcd2.backlight();

  // Print the maximum speed on the second LCD
  lcd2.setCursor(0, 0);
  lcd2.print("Max Speed:120KMh");

  // Initialize DHT sensor
  dht.begin();
}

void loop() {
  // Read sensor values
  val1 = digitalRead(IR1);
  val2 = digitalRead(IR2);
  val3 = digitalRead(IR3);
  val4 = digitalRead(LDR);
  
  // Read temperature and humidity sensor values
  float temperatureC = dht.readTemperature();
  
  // Print sensor values and temperature to serial monitor
  Serial.print("IR1: "); Serial.print(val1);
  Serial.print(" | IR2: "); Serial.print(val2);
  Serial.print(" | IR3: "); Serial.print(val3);
  Serial.print(" | LDR: "); Serial.print(val4);
  Serial.print(" | Temp: "); Serial.print(temperatureC); Serial.println(" C");

  // Display temperature on the first LCD
  lcd1.clear();
  lcd1.setCursor(0, 0);
  lcd1.print("Temp: "); lcd1.print(temperatureC); lcd1.print(" C");

  // Control LEDs based on sensor values
  if (val1 == 0 && val2 == 0 && val3 == 0 && val4 == 0) {
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
  } else if (val1 == 1 && val2 == 1 && val3 == 1 && val4 == 0) {
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
  } else if (val1 == 0 && val2 == 0 && val3 == 0 && val4 == 1) {
    analogWrite(led1, brit);
    analogWrite(led2, brit);
    analogWrite(led3, brit);
  } else if (val1 == 1 && val2 == 0 && val3 == 0 && val4 == 1) {
    analogWrite(led1, 255);
    analogWrite(led2, brit);
    analogWrite(led3, brit);
  } else if (val1 == 0 && val2 == 1 && val3 == 0 && val4 == 1) {
    analogWrite(led1, brit);
    analogWrite(led2, 255);
    analogWrite(led3, brit);
  } else if (val1 == 0 && val2 == 0 && val3 == 1 && val4 == 1) {
    analogWrite(led1, brit);
    analogWrite(led2, brit);
    analogWrite(led3, 200);
  }
}