#include <WiFi.h>
#include <FirebaseESP32.h>

// Replace with your network credentials
const char* ssid = "Redmi Note 13 Pro+ 5G";
const char* password = "11115555";

// Firebase project details
#define FIREBASE_HOST "fir-iot-cba4c-default-rtdb.asia-southeast1.firebasedatabase.app"  // Without trailing slash
#define FIREBASE_AUTH "AIzaSyAiK3lYv2vOcKhOH8GqTFEvmpdGjY4Yc2c"

// Define pins for the ultrasonic sensor
#define TRIG_PIN 13
#define ECHO_PIN 12

// Create pointers for FirebaseConfig and FirebaseAuth
FirebaseConfig firebaseConfig;
FirebaseAuth firebaseAuth;

// Create a FirebaseData object to interact with Firebase
FirebaseData firebaseData;

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

  // Connect to WiFi
  Serial.println("Connecting to WiFi...");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
  Serial.println("\nConnected to WiFi");

  // Set Firebase configuration
  firebaseConfig.host = FIREBASE_HOST;  // Firebase host URL
  firebaseConfig.api_key = FIREBASE_AUTH;  // Firebase API key

  // If no authentication, leave these blank
  firebaseAuth.user.email = "[email protected]";
  firebaseAuth.user.password = "123456";

  // Initialize Firebase
  Firebase.begin(&firebaseConfig, &firebaseAuth);

  // Optional: Verify Firebase readiness
  if (Firebase.ready()) {
    Serial.println("Connected to Firebase!");
  } else {
    Serial.println("Failed to connect to Firebase.");
  }

  // Configure ultrasonic sensor pins
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
}

void loop() {
  long duration;
  float distance;

  // Send a 10us HIGH pulse to trigger pin
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  // Read the echo pin
  duration = pulseIn(ECHO_PIN, HIGH);

  // Calculate the distance in cm
  distance = (duration * 0.034) / 2;

  // Print distance to Serial Monitor
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  // Send the data to Firebase
  if (Firebase.setFloat(firebaseData, "/distance", distance)) {
    Serial.println("Data successfully sent to Firebase");
  } else {
    Serial.println("Failed to send data to Firebase");
    Serial.println("Error: " + firebaseData.errorReason());
  }

  delay(1000);  // Delay between readings
}