#include <Ultrasonic.h>
#include <Talkie.h>

const int trigPins[4] = {35, 33, 26, 19}; // Array of trigger pins
const int echoPins[4] = {34, 32, 25, 18}; // Array of echo pins
const int buzzerPin = 22; // Buzzer pin
const int ledPin = 23; // LED pin

Ultrasonic sensors[4] = { // Array of ultrasonic sensor objects
  Ultrasonic(trigPins[0], echoPins[0]), // Create objects with trigger and echo pins
  Ultrasonic(trigPins[1], echoPins[1]),
  Ultrasonic(trigPins[2], echoPins[2]),
  Ultrasonic(trigPins[3], echoPins[3])
};

// Define constant for round trip time in centimeters
const float US_ROUNDTRIP_CM = 57.0;

Talkie voice; // Talkie object for speech synthesis

void setup() {
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600); // Initialize serial communication
}

void loop() {
  for (int i = 0; i < 4; i++) {
    long duration = sensors[i].read(); // Get sensor reading
    int distance = duration / US_ROUNDTRIP_CM; // Convert duration to distance in cm

    if (distance <= 100) { // Object detected within range
      sayDistance(distance);
      digitalWrite(ledPin, HIGH); // Turn on LED
      toneBuzzer(); // Play tone on buzzer
      delay(500); // Wait for 500 milliseconds
      digitalWrite(ledPin, LOW); // Turn off LED
      if (distance <= 10) { // Object very close
        playMelody();
      }
    }
  }
}

void sayDistance(int distance) {
  char buffer[50];
  sprintf(buffer, "Object is detected at %d centimeters", distance);
  const uint8_t* convertedBuffer = reinterpret_cast<const uint8_t*>(buffer);
  voice.say(convertedBuffer); // Convert text to speech
  Serial.println(buffer); // Print message to serial monitor
}

void playMelody() {
  // Define your melody and note durations here
}

void toneBuzzer() {
  // Play a tone on the buzzer pin using PWM
  // Adjust the duty cycle to change the volume
  for (int i = 0; i < 2000; i++) {
    digitalWrite(buzzerPin, HIGH);
    delayMicroseconds(500); // Adjust the delay for the desired frequency
    digitalWrite(buzzerPin, LOW);
    delayMicroseconds(500); // Adjust the delay for the desired frequency
  }
}