Another specimen: Oplayer SW1402 smartwatch (MT2502D)

As my other MT626x/MT250x hardware is far away from me, I picked up this thing. I really wanted to deal with MT2502 family, as there's at least decent Bluetooth (that one which is BLE). Extra bonus is missing SIM card - we'll be never able to hack GSM completely, so the less there's hardware on a device, the better.

The info on that device is available in this repo: https://github.com/mtek-hack-hack/Oplay … smartwatch