Security system not working

Hey there, guys. Sorry for updating this old thread. My neighbor asked me to help him install a security system, but for some reason, it gives an error message. Any advice?

Not much info to go on there. Maybe check that the windows are all closed?

Or did you mean to convey that his Node-red based alarm system gives an error?
In which case you probably ought to tell us what the error is and where he sees it.

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[moderator note: I've move this to a new thread and closed the other one since it was four years old]

For reference:

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