https://www.yeung-sir.com/microbitrobotbit-ultrasonic-%e9%87%8f%e5%ba%a6%e8%b7%9d%e9%9b%a2/https://etchk.screenstepslive.com/s/etcsup/m/99698/l/1081229-ultrasonic-sensor
https://microbit.org/zh-tw/projects/make-it-code-it/pir-movement-alarm/
https://makecode.microbit.org/projects/soil-moisture/code
https://yeung-sir.com/microbit-water-sensor/
https://etchk.screenstepslive.com/s/etcsup