How to extract temperature DS18B20 from mqtt string thru sensor ID

Setup, Configuration and Use Items & Sitemaps
17

I suspect this may be an issue with the JSONPATH transformation, it should work.

MQTT binding reports:

Incoming payload 'NULL' not supported by type 'NumberValue'

But I can confirm the configuration saved correctly via the REST api:

"transformationPattern": "JSONPATH:$.[?(@.Id==\"3C01B6078704\")].Temperature"

And I have successfully tested the expression at www.jsonpath.com with and without the escapes.

However, this appears to work via rules?