[SOLVED] Thermostat Rule Help (gpio, dht22, exec binding, things, items, rules)

Setup, Configuration and Use Scripts & Rules
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I think the best way would be to put the time the switch changed to open in an item.
For example:

rule "Entry Doors Update"
when
    reedSwitch changed from CLOSED to OPEN
then
    Thread::sleep(100) // give persistence time to catch up
    if (previousState == NULL) return;
    reedSwitch_LastOpen.postUpdate(now.toString)
end

Your new item will be:

DateTime reedSwitch_LastOpen

And it needs to be persisted and set to restoreOnStartUp to survive a reboot

And then a rule that fires everyday to check if the time now is more than one year after the saved time and fire out an email. I don’t have that code yet. Maybe you have a go and we’ll find out together