Is the magnetometer in the bangle V2 really unknown?

Posted on Wed 22nd, November 2023

• #1

user156811

https://github.com/espruino/Espruino/blob/master/boards/BANGLEJS2.py#L168

Its labeled as UNKNOWN_0C. Any reason why?
• #2

Gordon

Yes, it is!

Bangle.js 2 is actually reverse engineered hardware (because for the amount we ship we couldn't afford to design all our own), so we figured out basically everything you see on https://www.espruino.com/Bangle.js2+Technical by examining the PCB and disassembling the supplied firmware.

Usually you can work out from the chip markings or the I2C address/commands used for the chip but we haven't been able to do that in this case!

So if you do manage to figure it out I'd be really interested :)
• #3

user156811

Ooo, that make more sense. I thought you designed this. I'm more impressed that it works so well.

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