Permissions on Serial devices in Addons


I have an own plugin for my climate control which uses a Serial device.
In earlier versions that addon works perfekt, but since some month the acces on the serial device from inside the Addon isn’t possible anymore.
the user as which the software is running has no permissions on the device…

What I’ve done:

  • Added UART = TRUE in my config.json
  • Added my service user to dialin group
  • tried to change the permissions on /dev/ttyUSB0 (but it’s not possible because it’s a read only device, in earlier versions it was possible and solved my issue)
  • I use a debian based base-image

Any ideas how to change the permissions for the device?