micro:bit
led.stopAnimation()
BLE
https://makecode.microbit.org/reference/bluetooth/bluetooth-pairing
http://bluetooth-mdw.blogspot.tw/p/bbc-microbit.html
https://make.techwillsaveus.com/bbc-microbit/activities/microbot-bluetooth-control
CASE
https://www.thingiverse.com/thing:1692680
https://www.thingiverse.com/thing:2769213
with battery case
http://www.thingiverse.com/thing:3018333
Py4t