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 ??
02021c1a I/O first 02 is d0 and d1 in lower bits, last 16 bits are adc2