#define BLYNK_TEMPLATE_ID "TMPL5Cg9KrSVg"
#define BLYNK_TEMPLATE_NAME "IoTBasedHomeSecSystem"
#define BLYNK_AUTH_TOKEN "ijJMbeqwiSUNXwHguitqMJMuBGUWg61e"

#include <ESP32Servo.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>

const int BUZZER_PIN = 27;
const int LED_PIN = 14;
const int MOTION_PIN = 25;
const int SERVO_PIN = 18;

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

int pos = 0;
bool isLocked = true;

LiquidCrystal_I2C mylcd(0x27, 16, 2);
BlynkTimer timer;
Servo servo;

void setup() {
  Serial.begin(115200);
  Blynk.begin(auth,ssid,pass);
  pinMode(LED_PIN, OUTPUT);
  pinMode(MOTION_PIN, INPUT);
  mylcd.init();
  mylcd.backlight();
  servo.attach(SERVO_PIN, 500, 2400);
  timer.setInterval(3000L, sendSensor);
}

void loop() {
  Blynk.run();
  timer.run();
}

void sendSensor() {
  int pinState = digitalRead(MOTION_PIN);
  
  mylcd.clear();

  if (pinState == HIGH) {
    mylcd.setCursor(0, 0);
    mylcd.print("Motion detected");
    tone(BUZZER_PIN, 100, 100);
    Blynk.virtualWrite(V0, 1);
    Serial.println("MOTION DETECTED");

    if (isLocked) {
      lock(false);
      isLocked = false;
    }
  } else {
    noTone(BUZZER_PIN);
    Blynk.virtualWrite(V0, 0);
    Serial.println("NO MOTION");

    if (!isLocked) {
      lock(true);
      isLocked = true;
    }
  }

  digitalWrite(LED_PIN, pinState);
}

void lock(bool isLocked) {
  Serial.println(isLocked ? "LOCK" : "UNLOCK");
  Serial.println("-----");

  if (isLocked) {
    servo.write(90);
    delay(300);
  } else {
    for (pos = 90; pos >= 0; pos -= 1) {
      servo.write(pos);
      delay(15);
    }
  }
}