Zniffer - analysis of FGWP-102 "mesh update" Introduction This is part 2 in my series on "advanced Zniffer decodes and in-depth Z-Wave workings".   Part 1, called "Zniffer capture of a 4-hop route, working, but it takes 110ms" is here:   Please login or register to see this link.   I'll do my best to make this post accessible to a wide audience, but I doubt it will be easy to understand if you have never thought about how Z-Wave works (or could work).