I’ve just bought an activity tracker (with heart rate monitor) an ID107 type device.
Its processor is a Nordic nRF51822, the same processor as the Micro:Bit
I said it was a useless piece of information!
However I am a bit intrigued because it has a 3 axis accelerometer (KX022-1020) … so can it be hacked?
Probably! Albeit I’ve never really reverse-engineered or hacked any devices so I can’t be sure. I guess it boils down to cracking it open and- magnifying glass in hand- trying to reverse-engineer the schematic and parts as a first point of call. And hoping it’s not all potted and inaccessible!
I found this teardown, the images aren’t the best but it does look like you could reverse engineer the schematic