How to make a web app for your own Bluetooth Low Energy device? Step 13

main.js

// Intermediate buffer for incoming data
let readBuffer = '';

// Data receiving
function handleCharacteristicValueChanged(event) {
  let value = new TextDecoder().decode(event.target.value);

  for (let c of value) {
    if (c === '\n') {
      let data = readBuffer.trim();
      readBuffer = '';

      if (data) {
        receive(data);
      }
    }
    else {
      readBuffer += c;
    }
  }
}

// Received data handling
function receive(data) {
  log(data, 'in');
}