Browan TBHH100 Payload Decoder

Decode Browan TBHH100 (Tabs Healthy Home) LoRaWAN payloads online: status, battery voltage, temperature and humidity with their masks and offsets. Includes payload structure, verified examples and a decodeUplink codec for ChirpStack v4 and The Things Stack.

Example payloads

Payload structure

Ready-to-use codec

ChirpStack v4 and The Things Stack share the same decodeUplink(input) signature: paste this into the device profile codec (ChirpStack) or the payload formatter (TTN).

function decodeUplink(input) {
  var b = input.bytes;
  var humidity = b[3] & 0x7F;
  return {
    data: {
      status: b[0] >> 3,
      battery: (25 + (b[1] & 0x0F)) / 10,
      temperature: (b[2] & 0x7F) - 32,
      humidity: humidity === 127 ? null : humidity
    }
  };
}

About the TBHH100 uplink

The Browan TBHH100 (“Tabs Healthy Home Sensor”) is a compact indoor temperature and humidity sensor. All Browan Tabs devices share a family style: tiny fixed payloads with bit-packed fields, each product on its own FPort — the TBHH100 uses FPort 103.

What makes this payload different from most sensors:

• Nothing is a plain number. Battery is a nibble plus an offset ((25 + n) / 10 volts), temperature carries a −32 °C offset, and both temperature and humidity mask off their most significant bit.
• Integer resolution. Temperature comes in whole degrees — if you see decimals in a dashboard they were interpolated downstream, not measured.
• Humidity 127 = invalid. Check for the sentinel before storing.
• The 0xFFFFFFFF tail is normal. Bytes 4–7 are the eCO2/VOC fields of the Healthy Home family; the TBHH100 has no gas sensors, so they are always 0xFFFF and should be ignored.

References

• Official codec: github.com/TheThingsNetwork/lorawan-devices, vendor/browan/tbhh100.js
• Browan Healthy Home family reference manual — browan.com