Scott,
This code is LORA_BUFFER_FULL. There was a bug where this wasn’t coupled with a good mDot error code in some cases. You’d get this when you’re attempting to send data but there’s not enough room because there are MAC command responses in the option bytes for the next uplink packet.
We intend to add a new function so customers can see how much space is available in the next uplink. A workaround is to send an empty packet first, then try sending again.
Cheers,
Mike