#include <ESP32Servo.h>

#define TRIGGER_PIN 12
#define ECHO_PIN 13
#define SERVO_PIN 14
#define BUTTON_PIN 15
#define LED_PIN 16 // Example pin for LED indicator

Servo servo;
int buttonState = 0;
unsigned long manualOverrideStartTime = 0;
const unsigned long manualOverrideTimeout = 10000; // 10 seconds timeout for manual override

void setup() {
  Serial.begin(9600);
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(SERVO_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  pinMode(LED_PIN, OUTPUT);
  servo.attach(SERVO_PIN);
}

void loop() {
  buttonState = digitalRead(BUTTON_PIN);

  if (buttonState == HIGH) {
    // Manual override
    servo.write(90);
    manualOverrideStartTime = millis(); // Record the time manual override started
    digitalWrite(LED_PIN, HIGH);
    delay(3000);
     // Turn on LED indicator
    digitalWrite(LED_PIN, LOW);
  } else {
    // Check if manual override timeout has elapsed
    if (millis() - manualOverrideStartTime >= manualOverrideTimeout) {
      servo.write(0); // Lock the door
      digitalWrite(LED_PIN, LOW); // Turn off LED indicator
    }

    // Ultrasonic sensor logic (unchanged from previous code)
    long duration, distance;
    digitalWrite(TRIGGER_PIN, LOW);
    delayMicroseconds(2);
    digitalWrite(TRIGGER_PIN, HIGH);
    delayMicroseconds(10);
    digitalWrite(TRIGGER_PIN, LOW);
    duration = pulseIn(ECHO_PIN, HIGH);
    distance = duration * 0.034 / 2;
    if (distance < 10) {
      // Detected presence, unlock the door
      servo.write(90);
      delay(2000);
      servo.write(0);
    }
  }
}