#include <DHTesp.h>
#include <ESP32Servo.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <ThingSpeak.h>
WiFiClient client;
long myChannelNumber = 2645188;
const char * myWriteAPIKey = "AUEXZ6VRS8GKARG8";
int statusCode;
float d;

#define SERVO_PIN 14 
#define PIR_PIN 25 

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

DHTesp srk;
TempAndHumidity data;
  
bool motionDetected = false;
bool doorLocked = true;  

Servo doorLock;

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);

void setup() {
  ThingSpeak.begin(client);
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  
  srk.setup(18, DHTesp::DHT22);
  Serial.println("Hello, ESP32!");
  pinMode(PIR_PIN, INPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT); 

  doorLock.attach(SERVO_PIN);
  doorLock.write(0);

  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Smart Door Lock");
}

void loop() {
  data = srk.getTempAndHumidity();
  if(WiFi.status() != WL_CONNECTED)
  {
  Serial.print("Attempting to connect");
    while(WiFi.status() != WL_CONNECTED)
    {
    WiFi.begin(ssid, pass); 
    Serial.print(".");
    delay(5000);
    }
  Serial.println("\nConnected.");
  } 
  Serial.println("Humi :" + String(data.humidity));
  Serial.println(("Temp :" + String(data.humidity)));
  Serial.print("------------");
  delay(1000);

  motionDetected = digitalRead(PIR_PIN);
  if (motionDetected) {
      if(doorLocked){
         unlockDoor();
      }else{
        lockDoor();
      }  
  }
 delay(200);

  ThingSpeak.setField(1, data.temperature);
   ThingSpeak.setField(2, data.humidity);
    
  statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);

if(statusCode == 200) { //successful writing code
Serial.println("Channel update successful.");
}
else {
Serial.println("Problem Writing data. HTTP error code :" +
String(statusCode));
}

 
}



void unlockDoor() {
  doorLocked = false;
  LCD.clear();
  LCD.setCursor(0, 0);
  LCD.print("Motion Detected");
  LCD.setCursor(0, 1);
  LCD.print("Door Unlocked");
  doorLock.write(90);
  digitalWrite(12, HIGH);
  delay(2000);
  digitalWrite(12, LOW);

  delay(5000);             
  doorLocked = true;
  lockDoor();
}


void lockDoor() {
  doorLock.write(0);
  LCD.clear();
  LCD.setCursor(0, 0);
  LCD.print("Door Locked");
  digitalWrite(13, HIGH);
  delay(2000);
  digitalWrite(13, LOW);
}