Hi, I have a RAK831 with Raspi 3 for connect the Chirpstack private server which run on cloud. First, I install the ttn-gateway on github by rak repository in raspberry pi and config the gateway id and cloud server ip. But chirpstack shown my gateway is never seen.
Please see this guide, it contains some debugging steps to troubleshoot issues:
https://www.chirpstack.io/docs/guides/connect-gateway.html