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oliexdev / openScale

Open-source weight and body metrics tracker, with support for Bluetooth scales
GNU General Public License v3.0
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OKOK implementation does not support my Chipsea-BLE scale (implementation available) #930

Closed rrooggiieerr closed 1 year ago

rrooggiieerr commented 1 year ago

Describe the bug The current OKOK implementation does not support my Chipsea-BLE scale. I have however managed to reverse engineer the communication with the scale and have implemented a working version. I'll great a pull request with the updated code

To Reproduce Reproduced with latest dev version: ???

Expected behavior I expect the weight of the scale to be read by openScale

Additional context I was actually looking for the protocol create a Home Assistant integration for the scale, but then found that the openScale implementation of the OKOK protocol does not support my scale.

Debug log Was not able to get the BLE debug log from my Android phone, however here is some more info of what I managed to find out using other ways.

The scale identifies as Chipsea-BLE on Bluetooth

Manufacturer Specific Data index is 0xf0ff

Manufacturer Specific Data:
 98,7 Kg > 0204db03000000000000000050fb19c01c6d
114,4 Kg > 02047804000000000000000050fb19c01c6d
 98,3 Kg > 0204d703000000000000000050fb19c01c6d

Basically byte 2 and 3 are the only bytes that change where the most significant byte is byte 3 and the least significant byte is byte 2

There is no impedance transmitted There is no checksum

oliexdev commented 1 year ago

Thanks for your PR I merged it into the master branch.