const serviceUuid = "19b10010-e8f2-537e-4f6c-d104768a1214";

let myBLE;

let isConnected = false;

​

function setup() {

  // Create a p5ble class

  myBLE = new p5ble();

​

  createCanvas(200, 200);

  textSize(20);

  textAlign(CENTER, CENTER);

​

  // Create a 'Connect' button

  const connectButton = createButton('Connect')

  connectButton.mousePressed(connectToBle);

​

  // Create a 'Disconnect' button

  const disconnectButton = createButton('Disconnect')

  disconnectButton.mousePressed(disconnectToBle);

}

​

function connectToBle() {

  // Connect to a device by passing the service UUID

  myBLE.connect(serviceUuid, gotCharacteristics);

}

​

function disconnectToBle() {

  // Disonnect to the device

  myBLE.disconnect();

  // Check if myBLE is connected

  isConnected = myBLE.isConnected();

}

​

function onDisconnected() {

  console.log('Device got disconnected.');

  isConnected = false;

}

​

// A function that will be called once got characteristics

function gotCharacteristics(error, characteristics) {

  if (error) console.log('error: ', error);

  console.log('characteristics: ', characteristics);

​

  // Check if myBLE is connected

  isConnected = myBLE.isConnected();

​

  // Add a event handler when the device is disconnected

  myBLE.onDisconnected(onDisconnected)

}

​

function draw() {

  if (isConnected) {

    background(0, 255, 0);

    text('Connected!', 100, 100);

  } else {

    background(255, 0, 0);

    text('Disconnected :/', 100, 100);

  }

}