OpenBLEDevice index / LifesenseWhy this exists

Scale / PROTOCOL LIBRARY

Lifesense

4 indexed models · 1 hardware verified

An open connection to Lifesense A2/A3 scales, including the Philips DL8780. Read measurements, understand the handshake, and use the library in your own application.

Read the protocol manual View on PyPI

Hardware verified on 1 model

Catalog from openble · Updated 24 Oct 2026 · Source 13d75ea

ONE PROTOCOL, MANY DEVICES

Devices using this protocol

4 indexed · 1 hardware verified

Verification is specific to a model and the functions described below. Documented models still need a compatibility check.

Find a modelVerification

Showing 4 models

Philips

DL8780

Hardware verified

Firmware: Not recorded
Test platform: macOS

Checked against a live Philips DL8780. Other scales that speak the same Lifesense A2/A3 protocol may work, but are not all tested.

Protocol manual 0 open issues Report compatibility

Lifesense

A2

Documented only

Firmware: Not recorded
Test platform: Not tested

Listed in the app’s scale model map. Live compatibility with this library has not been verified.

Protocol manual 0 open issues Report compatibility

Not recorded

BS 440 connect

Documented only

Firmware: Not recorded
Test platform: Not tested

Listed in the app’s scale model map. Live compatibility with this library has not been verified.

Protocol manual 0 open issues Report compatibility

Not recorded

GBF-1251-B

Documented only

Firmware: Not recorded
Test platform: Not tested

Listed in the app’s scale model map. Live compatibility with this library has not been verified.

Protocol manual 0 open issues Report compatibility

Add another model

What’s possible

Lifesense capabilities
Capability	Status	Details
Weight	Read	Parsers for A2 and A3 weight notifications.
Impedance	Read	Decode the scale’s measurement and append packets.
Pairing and sync	Available	A reusable handshake with persistent pairing state.
Bathroom Hub	Integrated	Assign readings to people and keep them on your own hardware.

What we’ve checked

Checked against a live Philips DL8780. Other scales that speak the same Lifesense A2/A3 protocol may work, but are not all tested.

Known limits

Body composition values in the Bathroom Hub are calculated per person. They are estimates, not medical measurements.

Start with the library

Run the Bathroom Hub, or use the library with your own Bluetooth transport.

TERMINAL

pip install openble-lifesense

A small example

PYTHON

from openble.lifesense.packets import parse_a3_weight

reading = parse_a3_weight(bytes.fromhex(
    "1f 16 26 00 fe 89 50 91 1f 00 00 00 00 17 13 00 ff 01 19 00"
))
print(reading["weight_kg"])  # 97.5

Known issues & findings

No linked open issues in this catalog update.

View protocol issues

Have more to add?

Another model, a better capture, or a missing detail can move the protocol forward.

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