#include <ESP32Servo.h>

// Pin definitions
const int potPin = 0;       // Potentiometer
const int relayPin = 12;    // Relay 1
const int relay2Pin = 14;   // Relay 2
const int servoPin = 33;    // Servo
const int trigPin = 26;     // Ultrasonic Sensor Trig
const int echoPin = 25;     // Ultrasonic Sensor Echo

// Variables
Servo myServo;
long duration;
int distance;
int potValue;

void setup() {
  // Initialize pins
  pinMode(relayPin, OUTPUT);
  pinMode(relay2Pin, OUTPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  myServo.attach(servoPin);

  // Initialize Serial Monitor
  Serial.begin(115200);
}

void loop() {
  // Read potentiometer value
  potValue = analogRead(potPin);
  Serial.print("Potentiometer Value: ");
  Serial.println(potValue);

  // Control Relay 2 based on potentiometer value
  if (potValue < 500) {
    digitalWrite(relay2Pin, LOW);  // Turn off Relay 2
  } else {
    digitalWrite(relay2Pin, HIGH); // Turn on Relay 2
  }

  // Measure distance using ultrasonic sensor
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = duration * 0.034 / 2; // Calculate distance in cm

  Serial.print("Distance: ");
  Serial.println(distance);

  // Control Relay 1 based on distance
  if (distance < 100) {
    digitalWrite(relayPin, HIGH);  // Turn on Relay 1
  } else {
    digitalWrite(relayPin, LOW);   // Turn off Relay 1
  }

  // Control Servo based on distance (optional)
  if (distance < 100) {
    myServo.write(90);  // Move servo to 90 degrees
  } else {
    myServo.write(0);   // Move servo to 0 degrees
  }

  delay(100); // Small delay for stability
}