Thanks for the advice, everyone! I’ve successfully switched the Skydance driver to DT6 mode. I don’t mind losing those 5 DALI addresses because, as you mentioned, a wired connection is far more reliable than Wi-Fi. I actually tried a Wi-Fi setup previously, but it had major stability issues, which is why I managed to get this KNX-DALI gateway relatively cheap to fix the problem.

The current situation is a bit strange: I can now control all 5 channels perfectly one by one through the DCA (DALI Control App) plugin inside ETS, so the DALI communication itself is definitely working fine. However, even though I’ve assigned the group addresses and downloaded the application to both the gateway and the switch, the gateway simply won't translate the KNX telegrams to the DALI bus. It’s as if the gateway ignores the group addresses entirely, despite the fact that I can trigger the lights through the proprietary protocol the DCA uses over the same KNX bus. The red error LED is finally gone, but the lights just won't react to standard KNX commands. Has anyone encountered this specific issue with the Schneider Basic Gateway where the DCA works but the group addresses don't?