Request for classic confinement: Tegh


the octoprint snap does not solve it currently because it refuses to even start as root (so you can not use it as a daemon at all until Phase 1 of 'Opt-in per-snap users/groups' (aka, the 'daemon' user) has landed … )

but your appliactio seems to be able to run as root so you should not need to do anything, if your app starts as a daemon it should a) be running as root and thus have full access to the serial device (like jamie said above) … or if you run the app as a user and the user is in the dialout group it should have full access (same should go for running the app via sudo)