Switch with expire

[marcel_erkel]

Please use code fences, it makes reading your topic much easier for those who are willing to provide you with help. Note that in Firefox the buttons may not show up but if you hover over them then the fly over help will popup.

Item

String LightSwitchExpiration
Switch LightSwitch “Light” {expire=“LightSwitchExpiration,command=OFF”}

Rule

rule “Test Timer”
when
    Item LightSwitchExpiration changed
then
    LightSwitch.sendCommand (ON)
end

the switch never turn off

019-03-20 18:12:21.473 [ome.event.ItemCommandEvent] - Item ‘LightSwitchExpiration’ received command 30s

2019-03-20 18:12:21.493 [vent.ItemStateChangedEvent] - LightSwitchExpiration changed from 10s to 30s

2019-03-20 18:12:21.511 [ome.event.ItemCommandEvent] - Item ‘LightSwitch’ received command ON

There actually is no problem. This simply does not work:

Switch LightSwitch “Light” {expire=“LightSwitchExpiration,command=OFF”}

The documentation also states the format the must be used:

The Expire binding accepts a duration of time that can be made up of hours, minutes and seconds in the format

expire="1h 30m 45s"
expire="1h05s"
expire="55h 59m        12s"

Any part is optional, but any part present must be in the given order (hours, minutes, seconds). Whitespace is allowed between sections.

In your case the Expire binding reads ‘LightSwitchExpiration’ as a literal text string. It will not lookup the value of the LightSwitchExpiration item. The text ‘LightSwitchExpiration’ does not qualify as a correct time and hence the expire binding does not know when it should expire the state.