Ok. I am getting data at the master node from 2 other nodes. I have d0 and d1 configured as digital inputs with pull ups and d3 configured as an analog input. I have figured out what fields in the output are sl, sh, d0, d1 and adc2, but wonder what is the meaning of the other fields. Here is what I have figured out so far. This is one frame broken into 32 bit fields.
7e001492 7e is start of frame, 0014 is frame length, 92 is ??
0013a200 sh
4106aac7 sl
fffec101 ??
00030400 ??
02021c1a I/O first 02 is d0 and d1 in lower bits, last 16 bits are adc2