Connection-less scanning and advertising started working today.
Two ts06.2s are chatting. Each advertises its presence for 2 seconds and waits 5 seconds before doing it again. In a parallel thread, each is scanning for advertisements for 5 seconds every 10 seconds. Amazingly they are managing to find each other.
The next job is to get those periods of activity to be shorter and use less power, and then it is on to DecaWave-land.