MQTT binding items value when the associated Thing goes offline

[rossko57]

@pablo

It would be nice to get the items linked to channel set to undef or nothing at all.

Make it so with rules, today. Do not force other users to conform to your needs. An optional enhancement might be useful.

@pablo

You mention that it’s possible to set a item to undef via transform, please can you post a link to an example

[SOLVED] MQTT: How to filter implausible values on channel?

Thank you very much, that did the trick! So my new JS transformation function “filter_ltminus100_gt100.js” which filters all values above 100 degrees and below -100 degrees now looks like this: (function(i) { var val = parseFloat(i); if (val >= 100 || val <= -100 ) { return 'UNDEF'; } else { return val; } })(input) and the channel definition in the .things file like this: Type number : TE_MJHTV1_5C8E "TE_MJHTV1_5C8E " [ stateTopic="OHAB/TE_MJHTV1_5C8E", transformationPatter…

but that has nothing to do ith ‘unreachable’

@pablo

I would choose to have a red badge next to the item In the UI

Again, let’s not force other people to do what you want.
Imagine an Item showing “currently calling phone number”. Most of the day, that will be UNDEF (there isn’t one) and this is not unexpected.
You can configure your UI to hide the entry altogether, or show red blobs, or whatever you want.