Pushbutton. Autoupdate=false does not work?

[maxico (Maximilian Scheiner)]

Autoupdate= false does not change the item back. I had the same learning curve

Rule to postUpdate an Item works but Item falls back after some seconds

That’s not what autoupdate does. Example: autoupdate=false will stop (say) a rule-generated myswitch.sendCommand(ON) from setting the Item state to ON automatically by Openhab. If the binding of the switch receives an update from the hardware that the switch is really now on, the Item still gets updated by the binding. So autoupdate=false allows you to monitor the actual state of device, while autoupdate=true allows more faster display of the expected state in a sitemap. In your case the t…

there are several ways to realize a pushbutton.
One is to use a rule:

rule "Pushbutton"
when
	Item youritem received command ON
then
	createTimer(now.plusSeconds(1)) [|
		youritem.sendCommand(OFF)
	]
end

you can see the one second timer like @vzorglub mentioned.
The use of Milliseconds is also possible with

createTimer(now.plusMillis(150)) [|...

But the timer is not necessary.

Another option to realize a pushbutton is the expire binding:

Expire - Bindings