Proximity Alarm Distance Meter

Seperti yang dinyatakan sebelumnya, proyek ini dapat melakukan sejumlah tugas seperti alarm kedekatan mulai dari 2cm hingga 400cm (yaitu minimum dan jangkauan maksimal sensor ultrasonik) tergantung pada jarak yang Anda masukkan dalam sketsa Arduino Anda. Ini juga dapat digunakan untuk pengukuran jarak elektronik mulai dari 2cm hingga 400cm (4m).

Anda juga dapat melihat pembacaan jarak dalam meter, cm, dan inci di monitor seri Anda.

Alasan untuk modul Bluetooth adalah untuk melihat bacaan serial Anda melalui Bluetooth melalui aplikasi Android yang saya sebutkan sebelumnya Arduino Bluetooth controller.

Aplikasi Android:

 

Pembacaan jarak dimulai segera setelah koneksi berhasil.

 

CODING

// proximity sensor

const int buzzerPin = 8;               // buzzzer signal pin attached to digital pin 8
const int trigPin = 11;               // ultrasonic triggerPin connected to digital pin 11
const int echoPin = 10;               // ultrasonic echoPin connected to digital pin 10
int ledPin = 13;                      // LED positive connecteed to digital pin 13 (no need for resistor)
long duration;
float distanceMeters, distanceCm, distanceInch;

void setup() {                        // define all digital and analog pins
  pinMode(13, OUTPUT);                // LED pin as output
  pinMode(trigPin, OUTPUT);           // trigger pin as output because it sends signal
  pinMode(8, OUTPUT);                 // buzzer pin as output
  pinMode(echoPin, INPUT);             // echo pin as input becaue it recievs signals
  Serial.begin(9600);                  // initiate serial communication
}

void loop() {
  digitalWrite(trigPin, HIGH);                // initiate the ultrasonic sensor for sending and receiving
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  duration = pulseIn(echoPin, HIGH);

  distanceMeters = duration * 0.00034 / 2;      // speed of sound per second; divide by 2 due to then sound coming back to the echo part of the sensor
  distanceCm = duration * 0.034 / 2;
  distanceInch = duration * 0.0133 / 2;

  Serial.print("Distance: ");                     // print distance (meters) in serial monitor
  Serial.print(distanceMeters);
  Serial.println("  Meters");
  delay(300);

  Serial.print("Distance: ");                      // print distance (centi meters) in serial monitor
  Serial.print(distanceCm);
  Serial.println("  cm");
  delay(300);

  Serial.print("Distance: ");                        // print distance (inches) in serial monitor
  Serial.print(distanceInch);
  Serial.println("  inch");
  delay(300);
  Serial.println("----------------------------");     // seoeration


  if (distanceCm <= 30 )    {                           // if distance is greater than or equal to 30 cm on LED and on buzzer ON and OFF
    digitalWrite(13, HIGH);                                 // ...... with delay as interval
    tone(buzzerPin, 1200);
    delay(500);                                                 //   u can tweak the code to suit yourn needs
    noTone(buzzerPin);
    digitalWrite(13, LOW);
    delay(5);
  }
  else if (distanceCm > 100 )    {
    digitalWrite(13, LOW);
    noTone(buzzerPin);
  }
}

Source :

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