Arduino and NRF24L01 : 6 Steps (with Pictures) - Instructables

The control board acts as a . As resistance drops on the pad, the voltage at the AO pin changes.

However, . By following the calibration, hardware mods, and code above, you have essentially created a custom technical reference that outperforms any factory document.

If you just want to know "Is it raining? Yes/No," use the DO pin.

Raw datasheets won’t tell you this: