#define BLYNK_TEMPLATE_ID "TMPL63HgQ79QU"
#define BLYNK_TEMPLATE_NAME "Esp"
#define BLYNK_AUTH_TOKEN "jAW4yTuw7kYvUMSGlAfh0d2SXNU8W9Zr"
#include <ESP32Servo.h>
#include <WiFi.h>
#include <LiquidCrystal_I2C.h>
#include <BlynkSimpleEsp32.h>
char auth[] = BLYNK_AUTH_TOKEN;

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

BlynkTimer timer;

Servo servo1;

#define ldrPin1 34 // LDR sensor pin for parking space 1
#define ldrPin2 35 // LDR sensor pin for parking space 2
#define ldrPin3 33 // LDR sensor pin for parking space 3
#define ldrPin4 32 // LDR sensor pin for parking space 4

#define servoPin 13 // Servo motor pin
#define ledPin 12 // LED pin


BLYNK_CONNECTED() {
  Blynk.syncVirtual(V1); 
  Blynk.syncVirtual(V2); 
  Blynk.syncVirtual(V3); 
  Blynk.syncVirtual(V4); 
}
void loop() {
  // put your main code here, to run repeatedly:
  a=check(TRIG_A,ECHO_A);
  if(a==0){
     Blynk.virtualWrite(V1, 0 );
  }
  else{
     Blynk.virtualWrite(V1, 1);
  }
  b=check(TRIG_B,ECHO_B);
  if(b==0){
     Blynk.virtualWrite(V2, 0 );
  }
  else{
     Blynk.virtualWrite(V2, 1);
  }
  c=check(TRIG_C,ECHO_C);
  if(c==0){
     Blynk.virtualWrite(V3, 0 );
  }
  else{
     Blynk.virtualWrite(V3, 1);
  }
  d=check(TRIG_D,ECHO_D);
  if(d==0){
     Blynk.virtualWrite(V4, 0 );
  }
  else{
     Blynk.virtualWrite(V4, 1);
  }
  Serial.printf("%d %d %d %d \n",a,b,c,d);
  Slot=a+b+c+d;
  Serial.printf("slots free=%d \n",Slot);
  Blynk.virtualWrite(V0, Slot);
  delay(2000); // this speeds up the simulation
}

LiquidCrystal_I2C lcd(0x27, 16, 2); // Address 0x27 for I2C
Servo myservo;
  boolean full = 0;


  BLYNK_WRITE(V4){
    int Val = param.asInt();
    Serial.print("V4:");
    Serial.print(Val);
  if(Val)
  {
  myservo.write(90);
  delay(1000);
  }


  else
  {
  myservo.write(0);
  delay(1000);
  }
}

void setup() {
  Serial.begin(9600);


  pinMode(ldrPin1, INPUT);
  pinMode(ldrPin2, INPUT);
  pinMode(ldrPin3, INPUT);
  pinMode(ldrPin4, INPUT);
  
  pinMode(ledPin, OUTPUT);
  myservo.attach(servoPin);

  lcd.init();
  lcd.backlight();
  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print("Smart Parking");
  delay(1000);
    Blynk.begin(auth, ssid, pass);


}

void loop() {
    Blynk.run();
  boolean EntanceIR = digitalRead(ldrPin1);
  boolean ExitIR = digitalRead(ldrPin2);
  boolean ldrValue1 = digitalRead(ldrPin3);
  boolean ldrValue2 = digitalRead(ldrPin4);
   Blynk.virtualWrite(V1, int(ldrValue1)); // Initial value for the slider
   Blynk.virtualWrite(V2, int(ldrValue2)); // Initial value for the slider

  //V2
 if (ldrValue1 && ldrValue2)
 {
 digitalWrite(ledPin, HIGH);
 full = 1;
 lcd.print("Full!");}

 else
 {digitalWrite(ledPin, LOW);
 full=0;
 lcd.print("Empty!");
 }



if(EntanceIR && ExitIR)
{
       // Blynk.virtualWrite(V3, 0); //update button state

myservo.write(0);
}
else
{myservo.write(90);
//V3=1
     // Blynk.virtualWrite(v3, 1); //update button state

}

  // lcd.clear();
  // lcd.setCursor(0, 0);
  // lcd.print("LDR1: ");
  // lcd.print(ldrValue1);
  // lcd.setCursor(0, 1);
  // lcd.print("LDR2: ");
  // lcd.print(ldrValue2);
  // lcd.setCursor(0, 2);
  // lcd.print("LDR3: ");
  // lcd.print(ldrValue3);
  // lcd.setCursor(0, 3);
  // lcd.print("LDR4: ");
  // lcd.print(ldrValue4);



  delay(100);
  lcd.clear();
  timer.run();
}