Hi, what I want is when the humidity (humidity sensor value) is under a level to have my humidifier (relay) to switch on for 10 sec then switch of for 30 sec until the humidity have reached its threshold.

Think I have to use two UDItag for humidity sensor and relay state.
Then use one variable with two keys. on time and off time.

Humidity control in a greenhouse is difficult that's why i want to use variables to easily be able to adjust on and off intervals.

Kindest regards
Goran