Hallo community,
I found out that the knx-bindings for version 1 and 2 react differently. In version 1 a command on the KNX bus generates a command event while in version 2 it does not. Of course, when this command is generated through an openhab user interface, there will be a command generated from openhab itself. But when the command is generated from e.g. through a wall switch or an alarm panel there will be no command when using the knx-binding for version openhab2.
This seems to be by design!?
I found that others are having the same problems (e.g. knx-2-received-command-rule-trigger-does-not-work). Also, using switch-control may be a solution in the future, but not just yet issue 4234.
For the moment I handle my ‘switches’ without status on the KNX bus as buttons. The value of the button is set to NULL so every use of the switch (ON or OFF) will generate a change to which I can act upon.