@robî, sorry but I would like to know how rain sensor is working ? For example if it is raining during 10 minutes or 3hours it will not be the same. So how the system take into consideration the rain sensor ? Does it monitor how long the sensor is closed in order to know the duration of rain or is it detecting only the first time that is closed and then apply a delay of x hours ? On my configuration setup I am allowed to change the delay to restart the programs. But I definitely do not understand how rain sensor is working on OpenSprinkler. Please help me !