#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#define SDA_PIN 22
#define SCL_PIN 23
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define RED 0xFF0000

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT);
char auth[] = "MN4OVH-AUUm1u5xuFR5DLYnar2gg4FWg";

char ssid[] = "YourNetworkName";
char pass[] = "YourPassword";

void setup() {
  
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
  pinMode(26, INPUT);
  pinMode(33, INPUT);
  pinMode(18, INPUT);
  pinMode(27, OUTPUT);
  pinMode(25, OUTPUT);
  pinMode(19, OUTPUT);

   Wire.begin(SDA_PIN, SCL_PIN);

  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println("SSD1306 allocation failed");
    for (;;)
      ;
  }


  display.clearDisplay();
  display.setTextSize(2);

}

void loop() {
  //1
  digitalWrite(27,LOW);
  delay(100);
  digitalWrite(27,HIGH);
  delay(100);
  digitalWrite(27,LOW);
  long duration1 = pulseIn(26, HIGH); 
  long distance1 = duration1 * 0.0343 / 2;
    Serial.print("Disatnce 1 = ");
  Serial.println(distance1);
  delay(100);
  //2
  digitalWrite(25,LOW);
  delay(100);
  digitalWrite(25,HIGH);
  delay(100);
  digitalWrite(25,LOW);
  long duration2 = pulseIn(33, HIGH); 
  long distance2 = duration2 * 0.0343 / 2;
  Serial.print("Disatnce 2 = ");
  Serial.println(distance2);
  delay(100);
  //3
  digitalWrite(19,LOW);
  delay(100);
  digitalWrite(19,HIGH);
  delay(100);
  digitalWrite(19,LOW);
  long duration3 = pulseIn(18, HIGH); 
  long distance3 = duration3 * 0.0343 / 2;
  Serial.print("Disatnce 3 = ");
  Serial.println(distance3);
  delay(2000);
  
display.clearDisplay();
  display.setCursor(0, 0);
  display.setTextSize(2);
  display.setTextColor(WHITE);
  

  display.print("1: ");
  if (distance1 < 200) {
    display.println("In use");
    
  } else {
    display.println("Free");
  }

  display.print("2: ");
  if (distance2 < 200) {
    display.println("In use");
  } else {
    display.println("Free");
  }

  display.print("3: ");
  if (distance3 < 200) {
    display.println("In use");
  } else {
    display.println("Free");
  }
  Blynk.run();  // Add this to handle Blynk communication

  // ... Your distance measurement code ...

  // Send distance data to Blynk
  Blynk.virtualWrite(V1, distance1);
  Blynk.virtualWrite(V2, distance2);
  Blynk.virtualWrite(V3, distance3);

  display.display();
  delay(1000);

}