After another 8 hour day trying to make chirpstack join with RAK 11300 nodes, I give up. I bought my gateway nearly 4 years ago. I got TTN to work for a while, but their last upgrade was way too complex. Same with Chirpstack, except, Chirpstack V4 test 3, which loaded with only one burning to Etcher, one upload, and just fired up! However, it still did not work. I have been so close many times. I got the RAK modules to JOIN with their AT command set, but then couldn’t do anyhting else with them. I have had other RAK and Heltec nodes join, but never stably for more than a few minutes.
Today I researched initiating a command with MQTT, to the gateway, then downlinking to a node. This problem is cited many times on the internet, going back a few years, but no solution. I know LoRaWAN was not designed for this feature, but I thought after several years it would have been solved.
Anyway, giving up. LoRaWAN is still too complex for non-engineers. I think the first group to come up with an easy to use, single server based gateway will be the financial winner. I will use LoRa point to point for a few projects, but not wasting any more time with LoRaWAN.