JSR223 Jython unset item

Setup, Configuration and Use Scripts & Rules
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1

Hello,

I’m in the process of translating my rules from rules DSL to JSR 223 Jython.
Now I need a little support.
In one rule I need to unset an item under certain conditions. I tried the following:
sendCommandCheckFirst("itemName", UNDEF)
and also
sendCommandCheckFirst("itemName", NULL)
but both do not work.

Both result in an error
TypeError: sendCommand(): 2nd arg can't be coerced to String, java.lang.Number, org.eclipse.smarthome.core.types.Command

How can I accieve, what I’m trying in jython?

Best regards
Sven

2

Pass them as Strings. But you’ll run into another error. You cannot command an Item to NULL or UNDEF, only update.

postUpdateCheckFirst("itemName", "UNDEF")
postUpdateCheckFirst("itemName", "NULL")
1 Like
3

Hello Rich,

thank you for your fast response, it was really helpful.
Also your 9 episodes “Journey to JSR223 Python” was inspiring to me.

Best regards
Sven