https://www.thethingsnetwork.org/docs/devices/registration.html
- what sketch ? and only a link
- did you change the sketch with the credentials you’ve received when registering your device in your application ?
if you want an answer you have to provide exactly what sketch you use in your single channel gateway and what sketch you use in your node.
did you find the board connections from your shield ?
both need to be on the same channel and that is configured in both sketches, together with the way the node joins the network… ABP or OTAA
also I suggest to search this forum more… there are many examples how to configure