arduino_leaf_ac.h and arduino_leaf_ac.cpp files should be placed in the Arduino project folder. arduino_leaf_ac.h should be included in the .ino file of your build #include "arduino_leaf_ac.h" I have ...

Controlling the pH level of a solution is usually a tedious task. Adding an acid or base to the solution will change the pH, but manually monitoring the levels and adding the correct amount isn’t fun.