#include <Servo.h>

// Pin Definitions
const int ldr1Pin = A0; // LDR 1 connected to A0
const int ldr2Pin = A1; // LDR 2 connected to A1
const int ldr3Pin = A2; // LDR 3 connected to A2
const int servoPin = 9; // Servo motor connected to digital pin 9
const int relayPin = 7; // Relay module connected to digital pin 7

Servo myServo; 

void setup() {
  pinMode(ldr1Pin, INPUT);
  pinMode(ldr2Pin, INPUT);
  pinMode(ldr3Pin, INPUT);
  pinMode(relayPin, OUTPUT); 
  myServo.attach(servoPin); 
  Serial.begin(9600); 
}

void loop() {
  int ldr1Value = analogRead(ldr1Pin); // Read value from LDR 1
  int ldr2Value = analogRead(ldr2Pin); // Read value from LDR 2
  int ldr3Value = analogRead(ldr3Pin); // Read value from LDR 3

  // Initialize the relay to OFF position as a default for each loop iteration
  digitalWrite(relayPin, LOW);

  
  if (ldr1Value > ldr2Value && ldr1Value > ldr3Value) {
    myServo.write(0); // Move servo to 0 degrees
    digitalWrite(relayPin, HIGH); // Turn ON the relay
    Serial.println("LDR 1 is detected turn left.");
  } else if (ldr2Value > ldr1Value && ldr2Value > ldr3Value) {
    myServo.write(90); // Move servo to 90 degrees
    digitalWrite(relayPin, HIGH); // Turn ON the relay
    Serial.println("LDR 2 is detected turn straight.");
  } else if (ldr3Value > ldr1Value && ldr3Value > ldr2Value) {
    myServo.write(180); // Move servo to 180 degrees
    digitalWrite(relayPin, HIGH); // Turn ON the relay
    Serial.println("LDR 3 is detected turn right.");
  } else {

    }

  delay(1000); // Delay a second before the next loop iteration
}