I tried atcf and that reset the devices so they are no longer spewing the nonsense. So I have commented out the size == 0 for the time being. Unfortunately I am still not seeing any connectivity at this moment. (I got another powered hub to get both up at the same time on separate uart adapters.) suggestions of where I could productively poke I will follow. I have not yet had the cycles to understand the rfchip yet. BTW atcf4, then back to 0 or 1 cleared the errors I was getting. The work on the same channel that they were reporting the error on. I assume some reset or setup issue. Not a major concern for me, but I will keep it on my list of things to understand.