Calibration

10 steps:

1. Put the sensor in the low known value
2. Wait 1 min.
3. Press A on the micro:bit
4. Owe your device and then wipe it off
5. Put the sensor in the high known value
6. Wait 1 min.
7. Press B on the micro:bit
8. Press A + B on the micro:bit
9. Check that you have “k” and “offset on wappsto.com
10. Press Next