Owon B41t

Javascript interface for digital multimeter OWON B41T+ Test it here: https://pbrunot.github.io/owonb41t/multimeter.html (requires a modern browser with Javascript Bluetooth enabled)

Owon meters protocol

B41T+ follows B35 protocol, which is described here : https://github.com/DeanCording/owonb35

Basically every BT notification contains 3 int16:

one identifying the active measure, the number of decimals, and the units
one identifying the measure type (hold/auto/max/min...) * this one is not parsed at the moment *
one containing the displays digits with most significant bit used as sign bit

Bluetooth BLE 4.0+ Tested with TP-Link UB400 Check bluetooth first with Chrome browser: chrome://bluetooth-internals