This is my simple diagram
Node 24 is no Fibaro wall plug
When we going from node 1 the controller to node 7 and further we see this:
1 blob node colour - bands in node colour - bands in colour other nodes
The number of colours per node are here 9, if all connections are there.
The numbers of 'node colour' increase and the 'other node colours' decrease.
Note:
Node 15 is missing 2 connections to the left so 2 missing other colours.
Node 16 is missing 1 connection to the right so 1 missing node colour.
Node 26 is missing 2 connections to the right so 2 missing node colour.
The bands say thus nothing about sending or receiving data from nodes.