reset the micro bit to factory defaults

reset-the-micro-bit-to-factory-defaults
about the radio option on uBIT
breakout-board-for-bbc-microbit Need to think about the voltages and regulators here and on my Raspberry Pi proto board as I want to access the BBC ubit sensors from other uP.
The above board (!) has a 1A 3v3 regulator, an AMS1117.