#include <NewPing.h>
#include <Bounce2.h>

#define TRIG_PIN    D2
#define ECHO_PIN    D3
#define BUZZER_PIN  D4
#define BUTTON_PIN  D18

NewPing sonar(TRIG_PIN, ECHO_PIN);
Bounce debouncer = Bounce();

void setup() {
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  debouncer.attach(BUTTON_PIN);
  debouncer.interval(10);
  Serial.begin(115200);
}

void loop() {
  debouncer.update();
  
  // Check if the button is pressed
  if (debouncer.fell()) {
    startVoiceNavigation();
  }

  delay(50);
  int distance = sonar.ping_cm();

  if (distance > 0 && distance <= 30) {
    // Obstacle detected within 30 cm
    digitalWrite(BUZZER_PIN, HIGH);
    delay(500);  // Adjust as needed
    digitalWrite(BUZZER_PIN, LOW);
  }
}

void startVoiceNavigation() {
  // Add code here to trigger voice search or any other actions
  // on your connected mobile device (e.g., using Bluetooth or Wi-Fi).
  // This can involve sending specific commands or messages to a mobile app.
}