ti-sensor-tag-web-ble.js

    device =           // Step 1: ask for a device
      await navigator.bluetooth.requestDevice({
        filters: [{ services: [tagIdentifier] }],
        optionalServices: [serviceAddr]
      });
    server =           // Step 2: Connect to device
      await device.gatt.connect();
      deviceConnected(server);
    service =          // Step 3: Get the Service
      await server.getPrimaryService(serviceAddr);
    enableChar =       // Step 4: Enable Light Sensor
      await service.getCharacteristic(enableAddr);
      await enableChar.writeValue(new Uint8Array([0x01]));
    valueChar =        // Step 5: Get light characteristic
      await service.getCharacteristic(valueAddr);
                       // Step 6: Loop every 600ms
    readIntervalID = setInterval(async () => {
      byteArray =      // Step 7: Read bytes
        await valueChar.readValue();
                       // Step 8: display light
      displayLight(byteArray.getUint16(0, true));
    },1000);