Migration from OH 2 to 3: Things OFFLINE, Gateway ONLINE

Hello everybody,
I’m trying to migrate my KNX home from OH 2 to 3.
I successfully create the Gateway, with the same parameter that I used on OH2

UID: knx:ip:9f4445f7bc
label: KNX/IP Gateway
thingTypeUID: knx:ip
  useNAT: false
  readRetriesLimit: 3
  autoReconnectPeriod: 60
  type: TUNNEL
  localSourceAddr: 0.0.0
  readingPause: 50
  portNumber: 3671
  responseTimeout: 10
location: Soffitta

and I have the green light “ONLINE”

Now I’m think to create a light things. On OH 2 I had the following line:

	Type switch        : GF_Entryway_Light       "Ingresso"              [ ga="1/4/2" ]

I try to create the thing like that

UID: knx:device:9f4445f7bc:4c3f3dc698
label: KNX Device
thingTypeUID: knx:device
  pingInterval: 600
  address: 1/4/2
  readInterval: 0
  fetch: false
bridgeUID: knx:ip:9f4445f7bc

but always I have the “OFFLINE” label and “negative confirmation” in the log
2021-05-16 18:11:36.681 [WARN ] [calimero.link. ] - negative confirmation of 1.4.2: 2e009160fff114020081

What I’m doing wrong?

You are mixing physical address (the one you configure on the thing, where you put 1/4/2) and the group address (which is 1/4/2 and what you want to configure) and needs tobe configured on the channel.

Ok, got it, thanks