I have updated to the version 2.5, and I do not know how to migrate the MQTT. I would like to have a short “howto”, do I have to change the setup?
Currently I have this items which worked fine, but now I do not know how to migrate them. I have seen several POST where no, with MQTT 2.5 I have to edit things and item files, am I right?
No, this way is quite straightforward and you can keep your existing items but you will need to replace the MQTT information in the item definition.
Install the MQTT binding.
For each of your existing items using MQTT, in turn (do them one at a time):
Create a Generic MQTT thing and fill in the fields.
Create a channel for the item and fill in the fields (switch, string or whatever).
Cut and paste the channel information into the Item in your item file: