#define PIN_TRIG 26
#define PIN_ECHO 25
#define BUZZER   5
#define MOTOR    27

unsigned int level = 0;

void setup() {
  pinMode(BUZZER, OUTPUT);
  pinMode(MOTOR, OUTPUT);
  digitalWrite(MOTOR, LOW);

  Serial.begin(115200);
  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);
}

void loop() {
  // Start a new measurement:
  digitalWrite(PIN_TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG, LOW);

  // Read the result:
  int duration = pulseIn(PIN_ECHO, HIGH);
  Serial.print("Distance in CM: ");
  Serial.println(duration / 58);
  Serial.print("Distance in inches: ");
  Serial.println(duration / 148);

  level = duration / 58;

  // Produce auditory feedback based on the measured distance:
  if (level < 100) {
    tone(BUZZER, 500, 100); // Short, high-pitched tone
    digitalWrite(MOTOR, HIGH); // Activate motor
  } else if ((level >= 100) && (level < 200)) {
    tone(BUZZER, 300, 100); // Medium-pitched tone
    digitalWrite(MOTOR, LOW); // Deactivate motor
  } else if (level >= 200) {
    tone(BUZZER, 200, 100); // Long, low-pitched tone
    digitalWrite(MOTOR, LOW); // Deactivate motor
  }

  delay(1000); // Delay before next measurement
}