How to make a web app for your own Bluetooth Low Energy device? Step 15

main.js

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

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

  data += '\n';

  if (data.length > 20) {
    let chunks = data.match(/(.|[\r\n]){1,20}/g);

    writeToCharacteristic(characteristicCache, chunks[0]);

    for (let i = 1; i < chunks.length; i++) {
      setTimeout(() => {
        writeToCharacteristic(characteristicCache, chunks[i]);
      }, i * 100);
    }
  }
  else {
    writeToCharacteristic(characteristicCache, data);
  }

  log(data, 'out');
}