Oh3.4 -> oh4.0.2

openjdk 17 is not provided/available on Debian Buster.

According to the migration FAQ: openHAB 4 migration FAQ

  • Get a new SD card (preferrably an “Endurance” labelled one) and keep the old one as your fallback
  • Run option 50 to create an OH config backup and copy it to some box of yours
  • Download and flash openHABian 1.8
  • Put the SD in your Windows system and open the first (only) partition. Edit openhabian.conf and set clonebranch=openHAB3. That should result in (latest) OH3 being installed.
  • Also put your backup zip file there, name it initial.zip. That’ll auto-import the config during install.
  • Now put the SD in the Raspi and turn it on. Let openHABian do its install magic.
  • When finally done, login and run openhabian-config menu option 03 to upgrade to OH4
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