How to make a web app for your own Bluetooth Low Energy device? Step 14

main.js

function send(data) {
  data = String(data);

  if (!data || !characteristicCache) {
    return;
  }

  writeToCharacteristic(characteristicCache, data);
  log(data, 'out');
}

function writeToCharacteristic(characteristic, data) {
  characteristic.writeValue(new TextEncoder().encode(data));
}