Channels Types and Linked Items understanding

[rlkoshak (Rich Koshak)]

@pistoletov1974

But i do not need update item if values with HUMIDITY do not present in JSON packet.

If you upgrade to at least OH 2.5 M1 you can use chained transformations and use a REGEX to filter out those messages that don’t have the HUMIDITY present and only pass those that do to the JSONPATH. See MQTT 2.5 M1+ How to implement the equivalent to MQTT1 REGEX filters

@pistoletov1974

Where OPENHAB store items which i added from paper UI?

/var/lib/openhab2/jsondb/org.eclipse.smarthome.core.items.Item.json

@pistoletov1974

Does it possible to edit it as text files in OH1 style?

You can define your Items in .items files instead of through PaperUI. But you cannot edit Items defined through PaperUI in the OH1 style.