For a router configuration you do not need to specify much. Routers use IP multicast communication and for knx these addresses are all default presets and need not be given in the configuration. So for a router it is sufficient to have such a config:
UID: knx:ip:01e52303
label: KNX/IP Gateway
thingTypeUID: knx:ip
configuration:
useNAT: false
readRetriesLimit: 3
autoReconnectPeriod: 60
type: ROUTER
localSourceAddr: 0.0.0
readingPause: 50
portNumber: 3671
responseTimeout: 10
For an actor you need the physical knx bus address and for the channels the group addresses. Just like with the textual configuration in previous versions of openHAB.
Here is the configuration for one of my dimmer actors showing one channel:
UID: knx:device:01e52303:7aacfe8a
label: Dimmaktor D1.4
thingTypeUID: knx:device
configuration:
pingInterval: 600
address: 1.0.9
readInterval: 0
fetch: false
bridgeUID: knx:ip:01e52303
location: Technikraum
channels:
- id: A
channelTypeUID: knx:dimmer
label: Wandleuchte
description: null
configuration:
increaseDecrease: 9/1/11
position: 9/1/12+<9/1/14
switch: 9/1/10+<9/1/13
Hope this helps and you can have fun again with openHAB and knx