I’ve reinstalled everything (for the 8th time), BEFORE I launched the wizard I’ve copied the file in addons and renamed it the org.openhab.binding.sonoff.jar (pretty sure I tried it before!) AND added during the wizard another binding… and:
will now try to replicate in the docker!
Found my issue: wget
you cannot use wget on the standard link from github as it will download the page non the jar. Even if you select the permalink.
this is the correct link
https://raw.githubusercontent.com/delid4ve/openhab-sonoff-compiled/main/org.openhab.binding.sonoff-3.2.0-SNAPSHOT_2.5r6.jar
now it works even in the docker