pico_water
Automated plant watering with the Raspberry Pi Pico. This runs a monitoring loop on the second RP2040 core to obtain moisture from an external moisture sensor, and temperature from the built in temperature sensor on the Pico board. Below a given moisture threshold, a pump is periodically engaged until the threshold is reached again. Your mileage may very with the default thresholds!
Build instructions
mkdir build
cd build
cmake ../
make -j4Inputs / Outputs
PIN 0 : Output to the pump (HIGH on, LOW off).
PIN 26 : ADC moisture sensor input.
USB serial : Sends moisture (ADC voltage) and temperature (Celcius) every 10 seconds.