In previous article I present you a simple metode for read and control soil humidity (soil moisture) and for protect the probe of soil moisture sensor with intermitent power of sensor (just few seconds when measure process - at 5 second whem pump is on for not flooding and at few minutes wheh humidity is ok). Now, I put a inportant indication: time elapsed since the last watering process (maximum 999 hours 59 minutes, using millis() soubrotine, see article from https://www.arduino.cc/en/Reference/Millis).
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