I am using ChirpStack on a Raspberry Pi 4 in an RAK7244. My device uses the Murata ABZ module that I am programming with the ST Micro firmware version 1.0.3. I am having two OTA join problems.
The first is that when I make a join request, ChirpStack answers back so quickly that my device does not yet have the receive window open. It misses the join acknowledgement. Other gateways I have wait a bit later in the 5-second window to respond, so I have no problem with them. What adjustment can I make in ChirpStack to fix this?
The second issue is that ChirpStack seems to only be responding to join requests on channels 5 and 6 (as viewed from my device). My device is sending some join requests on channels 0 through 4 and channel 8, which are all being ignored. Where should I start to get a handle on the US915 channel configurations?