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Read S400 weigh-ins into Home Assistant
This integration reads live weight and saved weigh-ins directly from a Xiaomi S400 over Bluetooth. Its after-weigh-in mode can retrieve the scale’s own body-composition results and catch up on measurements taken while Home Assistant, your home automation server, was offline.
Setup needs a Xiaomi Home account and the scale’s keys. Support is experimental and tested only on MJTZC01YM firmware 2.1.1_0006; body-composition figures are estimates, not clinical measurements.

Bluetooth bathroom scales
Xiaomi Body Composition Scale S400 (partly)
MJTZC01YM firmware 2.1.1_0006 only; experimental
How did it go? Tips, problems, questions…
Read S400 weigh-ins into Home Assistant
This integration reads live weight and saved weigh-ins directly from a Xiaomi S400 over Bluetooth. Its after-weigh-in mode can retrieve the scale’s own body-composition results and catch up on measurements taken while Home Assistant, your home automation server, was offline.
Setup needs a Xiaomi Home account and the scale’s keys. Support is experimental and tested only on MJTZC01YM firmware 2.1.1_0006; body-composition figures are estimates, not clinical measurements.
snelstim
On GitHub

Bluetooth bathroom scales
Xiaomi Body Composition Scale S400 (partly)
MJTZC01YM firmware 2.1.1_0006 only; experimental
Feedback
How did it go? Tips, problems, questions…