#define BLYNK_TEMPLATE_ID "TMPL3HVPXZ_98"
#define BLYNK_TEMPLATE_NAME "Raspberry pi and blynk"
#define BLYNK_AUTH_TOKEN "_QWuaO56UA_DYjcyRDaiDm-6QLcpJNcA"
#define BLYNK_PRINT Serial

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <Adafruit_SSD1306.h>  // Include the Adafruit SSD1306 library
#include <Wire.h>             // Include the Wire library

char auth[] = BLYNK_AUTH_TOKEN;  // Auth Token

char ssid[] = "Wokwi-GUEST";      // SSID (WiFi Network Name)
char pass[] = "";                // WiFi password

#define SDA_PIN 22
#define SCL_PIN 23
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT);

BlynkTimer timer;

void setup() {
  Serial.begin(115200);

  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);

  Blynk.begin(auth, ssid, pass);
  timer.setInterval(1000L, sendSensorData);  // Send sensor data to Blynk every second
}

void sendSensorData() {
  // Slot 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("Distance 1 = ");
  Serial.println(distance1);
  delay(100);

  // Slot 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("Distance 2 = ");
  Serial.println(distance2);
  delay(100);

  // Slot 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("Distance 3 = ");
  Serial.println(distance3);

  if (distance1 < 200) {
    Blynk.virtualWrite(V1, "Parked");
} else {
    Blynk.virtualWrite(V1, "Free");
}
if (distance2 < 200) {
    Blynk.virtualWrite(V2, "Parked");
} else {
    Blynk.virtualWrite(V2, "Free");
}
if (distance3 < 200) {
    Blynk.virtualWrite(V3, "Parked");
} else {
    Blynk.virtualWrite(V3, "Free");
}

  displayStatus(distance1, distance2, distance3);
}

void displayStatus(int distance1, int distance2, int distance3) {
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);

  display.setCursor(0, 0);
  display.print("1: ");
  if (distance1 < 200) {
    display.println("Parked");
  } else {
    display.println("Free");
  }

  display.setCursor(0, 20);
  display.print("2: ");
  if (distance2 < 200) {
    display.println("Parked");
  } else {
    display.println("Free");
  }

  display.setCursor(0, 40);
  display.print("3: ");
  if (distance3 < 200) {
    display.println("Parked");
  } else {
    display.println("Free");
  }

  display.display();
}

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