> I see no way to differentiate between braking and going downhill. Any
> ideas ?

Since you specified you wanted a standalone unit, I'd say you need two
sensors - an accelerometer and also a tilt sensor in order to subtract out
gravity.

Make sure you get the right kind of tilt sensor, many of them are really
accelerometers, you don't want that kind.

Unfortunately this device is not going to be very accurate unless you can
predict the amount of tilt in the suspension caused by braking, and that
will vary considerably.

Cheers,

Bob


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