Mqtt, binding, things and transformation

Setup, Configuration and Use Beginners
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Please use How to use code fences.

I don’t use .things file and I don’t recommend their use so I can’t help with specifics. But the error is pretty clear. You are attempting to send 698489 as a command to a Contact Type Item/Channel. A Contact:

  • cannot receive commands
  • can only receive NULL, UNDEF, OPEN, and CLOSED as updates.

So you either have a Channel that needs to be defined to support Numbers or you need to create a transformation to convert that number to OPEN or CLOSED.