#define BLYNK_TEMPLATE_ID "TMPL37zKTQnZA"
#define BLYNK_TEMPLATE_NAME "Research Project"
#define BLYNK_AUTH_TOKEN "Y7mtXzcJiy4dG-fRq06oG8636YTEpnuU"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

// Wi-Fi credentials for STA mode (to connect to your router)
const char* wifiSSID = "Wokwi-GUEST";
const char* wifiPassword = "";

// Blynk credentials

// Define pin connections
const int potPin = 34;            // Potentiometer connected to GPIO34
const int trigPin = 26;           // Ultrasonic sensor TRIG connected to GPIO26
const int echoPin = 27;           // Ultrasonic sensor ECHO connected to GPIO27

// Function to read potentiometer value
int getPotValue() {
  int potValue = analogRead(potPin);
  int potPercent = map(potValue, 0, 4095, 0, 100); // Convert to percentage (0–100%)
  return potPercent;
}

// Function to read ultrasonic sensor value
float getUltrasonicValue() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  long duration = pulseIn(echoPin, HIGH);
  float distance = duration * 0.034 / 2; // Convert to centimeters
  return constrain(distance, 0, 100);    // Clamp to 0–100 cm
}

void setup() {
  // Initialize serial communication
  Serial.begin(115200);

  // Initialize Wi-Fi
  WiFi.begin(wifiSSID, wifiPassword);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // Initialize Blynk
  Blynk.begin(BLYNK_AUTH_TOKEN, wifiSSID, wifiPassword);

  // Set ultrasonic sensor pins
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop() {
  // Run Blynk
  Blynk.run();

  // Read sensor values
  int potValue = getPotValue();
  float ultrasonicValue = getUltrasonicValue();

  // Send data to Blynk
  Blynk.virtualWrite(V0, potValue);       // Potentiometer value to Virtual Pin V0
  Blynk.virtualWrite(V1, ultrasonicValue); // Ultrasonic value to Virtual Pin V1

  // Print values to serial for debugging
  Serial.print("Potentiometer: ");
  Serial.print(potValue);
  Serial.print("%, Ultrasonic: ");
  Serial.print(ultrasonicValue);
  Serial.println(" cm");

}