How do i evaluate an MQTT-telegram with a variable key

[rossko57]

Example -

Openhab2 + Tasmota devices: MQTT communication log WARN messages

Yes, the MQTT binding allows the magic of chaining two transforms. So first you would use REGEX to see if the payload contains “Timer1” at all. If it does, the whole payload gets passed to the chained JSONPATH. If it doesn’t, the transformation stops without WARN messages. See that linked post https://community.openhab.org/t/mqtt-2-5-m1-how-to-implement-the-equivalent-to-mqtt1-regex-filters/68350