Show date/time of last sensor update

Setup, Configuration and Use Beginners
3

Thanks. I tried this:

var SimpleDateFormat df = new SimpleDateFormat( "YYYY-MM-dd HH:mm:ss" )
var String Timestamp = df.format( new Date() )

logInfo("RFX_Wind_Update", Timestamp )
RFX_Wind_Update.postUpdate(Timestamp)

Logfile outputs correctly:

[o.model.script.RFX_Wind_Update] - 2015-08-26 21:09:34

but the item state itself isn’t set. Item definition looks like:

String RFX_Wind_Update “Wind letztes Update:” (FF_Office,Klima)