BMA421 reads all zeros

[danielt]

My pinetime is not devkit.
'debug' flag of dev gives logs on later steps so isn't usable.

What else can I check ? Does opening device and checking internal connections last option?

To be honest the comment about the internal connections might be me getting confused between step sensor and the heart rate sensor (someone asked me something about reading a bad id value that turned out to be a bad connection but I can't actually remember which one it was).

Reading all 1s does sound a lot like the chip isn't reacting to the ID command to you are just reading the bus pull up resistor instead.

Not much can be done from a software point of view. You could try adding some logic to retry a few times but its firmly in the long-shot category.