The digital signal output to be detected (usually marked as DO in the module) is applied to D2 input of the Arduino. Analog output (marked as AO ... at Digital PIN D13 int RLED= 12; // Dry Indicator ...

In such cases, an Arduino can be a great help – let me show you how ... But when a magnet approaches the sensor, the value of pin AO will change, and that analog value will increase or decrease ...

[Paul Stoffregen] proves that it can be pretty easy if you use the CapSense library for Arduino. Here he’s created three touch sensors ... is read by the secondary pin. Here that pin is ...