GDBus.Error:org.freedesktop.DBus.Error.AccessDenied

[Vlad Kolotov]

I installed the binding but nothing happens and I see the following error in the logs:

java java.lang.RuntimeException: Error getting object manager client:
GDBus.Error:org.freedesktop.DBus.Error.AccessDenied: Rejected send message, 2 matched rules;

Cause:
The "openhab" system user has insufficient permissions to access Bluez B-Bus interface.

Resolution:

1. Edit Bluez DBus config to add a permission to access Bluez for the bluetooth group (/etc/dbus-1/system.d/bluetooth.conf):

<busconfig>
  <policy user="root">
    ...
  </policy>
  <policy group="bluetooth">
    <allow send_destination="org.bluez"/>
  </policy>
  ...
</busconfig>

2. Add openhab user to the bluetooth group:

sudo usermod -a -G bluetooth openhab

3. Reload service definitions:

sudo systemctl daemon-reload

4. Restart bluez:

sudo systemctl restart bluetooth