On Linux, a permission to access USB device is required. It's possible to run dmrconfig-carroarmato0 as root, like "sudo dmrconfig-carroarmato0", but it's safer to enable access for users. Create a file /etc/udev/rules.d/99-dmr.rules with the following contents:

  # TYT MD-UV380
  SUBSYSTEM=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="df11", MODE="666"

  # Baofeng RD-5R, TD-5R, DM-1801
  SUBSYSTEM=="usb", ATTRS{idVendor}=="15a2", ATTRS{idProduct}=="0073", MODE="666"

  # Anytone AT-D868UV: ignore this device in Modem Manager
  ATTRS{idVendor}=="28e9" ATTRS{idProduct}=="018a", ENV{ID_MM_DEVICE_IGNORE}="1"
  sudo udevadm control --reload-rules

Before use you need to allow the Snap access to certain plugs: sudo snap connect dmrconfig-carroarmato0:raw-usb sudo snap connect dmrconfig-carroarmato0:log-observe

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