I have been digging through documents and tutorials looking for help configuring the RAK7243 LoRaWAN gateway. I have set up multiple nodes using raspberry pi zeros with LoRa hats that will transmit basic sensor data. I do not want to use The Things Network or LoRaServer as the data I am sending is sensitive and I do not want to pay for a server. My plan is to have a network of nodes that communicate only to the gateway without using any server. All the data will be stored locally on the gateway via SD card. Can I use the RAK7243 without any backend? Also how do I prevent the nodes from communicating with each other?
Any advice would be much appreciated.