@zboblamont Thank you for the explanation. I think that's a good idea with one ID per node, saving each with the node ID and the version number. Do you have one sketch for each of the types of node, or do you have one sketch per node? Do you use physical labels on the nodes or their cases?

I am thinking I would like to assign IDs to each of my nodes. Upon first boot of two Sensebender Micro boards, they were assigned ID 2 and 3. OK, it seems to be sequential. However, when I brought up my first PIR motion sensor on an Arduino, it was assigned ID 105. I was expecting to see it assigned 4.