Hi Tom Hydrosys, thank you for your answer but I am thinking we need to talk more.

Let me address your points.

1. - The threshold is compared with the sensor value after calibration, which are the values you see on the graph. Thats good, if it would be working. But this 50% threshold is always set independet if I set my threshold to 20 to 25, it still switches at around 50%. So it does not work. Please set your min to 20% and your max to 25 and let me know if it works on your side.

2. Pause between watering is relevant when you have more than one steps in one cycle, if you use only one step that is not going to be effective. Please forgive me my language, but this is bullshit. This nested loop is not necessary. Why would it? If you need a minimum watering you set it with the watering time. I set it to 30 seconds. If this is not enough, you make another moisture measurement (Cycle) according to the waiting time and water again. There is no need to cycle (period) inside a cycle.

3. Cycles starts when the sensor value is below the threshold and end when is above max threshold or all the watering steps are finished, it restarts when the sensor is again below the threshold or you save a new setting. Please forgive me, but very few and only very very very expensive sensors can fast and accurately read moisture in seconds. But in seconds your software can not average,so it cannot compensate for the cheapos we use. Anyway, in such a situation the sensor must be read out every second or even shorter to create a good result. But the read settings on the hardware page are set to very 15 Minutes. But more important, if you water for lets say 30 seconds there is no need to water for another 30 seconds right away. Also there is no need to measure moisture right away. Lets say your cycle waiting time is 3 hours, and the unit according to my proposal will measure again and water another 30 Minutes. So your upper threshold limit is over complicating everything and not necessary.

4. I wonder if there is someone else, who can test the functions on their setup, by setting waiting period to f.e. 480, watering period to 1 and threshold to 20 to 25. Please comment here for your results.

Thanks, Hydrosys. Actually my name is Lisa, what is yours? I did read the text you recommended and could not find a problem to my settings.

Here are the screenshots from today and yesterday.

As you can see, my readings of the sensor are fine. You can see, if it gets under ca. 55% it starts to water again and again, and when its above 55% it stops. That means, the "sensor threshold" and the "pause between watering" is not working. Your sensor reads very fast an shows the moisture increase immediately. Mine is buffered through a capacitor and comes up very slow, so it needs this delay to make the next evaluation. I wander which reading the "sensor threshold" is using? Is it using the reading before the calibration adjustment or after the calibration adjustment. Because I did set the threshold 20 - 25. But than also I wander why it is taking a reading at all every hour and waters when the "pause" is set to 480. Is there a max pause time of an hour? Also I have set the cycle to 1. Is maybe the delay only for the second watering step in one cycle? Than, what is a cycle, and how are they delayed? And why is the watering counter zero? And what is the meaning to reset cycle?

its the lowest, the interrupted line. Every dash is switching on the solenoid.