Read SwitchBot Indoor/Outdoor Thermo-Hygrometer

switchbot-th-outdoor.js

const noble = require('@abandonware/noble');

noble.on('stateChange', async (state) => {
  if (state === 'poweredOn') {
    await noble.startScanningAsync([], false);
  }
});

noble.on('discover', async (peripheral) => {
  if (peripheral.address !== "d5:c4:31:13:41:98") return
  await noble.stopScanningAsync();

  console.log(`${peripheral.address} (${peripheral.advertisement.localName})`);
  console.log(peripheral);

  data = peripheral.advertisement.manufacturerData
  console.log(data)
  
  // https://github.com/OpenWonderLabs/SwitchBotAPI-BLE/blob/latest/devicetypes/meter.md#outdoor-temperaturehumidity-sensor
  temp = ((data[10] & 0x0F) * 0.1 + (data[11] & 0x7F)) * ((data[11] & 0x80) > 0 ? 1 : -1);
  humidity = data[12] & 0x7F;
  console.log(temp, humidity)

  serviceData = peripheral.advertisement.serviceData[0]
  console.log(serviceData)
  battery_pct = serviceData.data[2] & 0x7f // this is undocumented?
  console.log(battery_pct)

  process.exit(0);
});