Xenon example BLE code

[ScruffR]

Since Xenons were not supposed to be running without an "owning" mesh it's not that straight forward.
If you had a gateway device it would be easy. You could just assign it to that dummy mesh and then never reconnect to it again (SYSTEM_MODE(MANUAL)).

Since I don't have any "virgin" Xenons anymore I don't know what exactly is required to do that without assigning it to a mesh.

You could search for Xenon standalone and Xenon without mesh tho'

e.g. this might help

Standalone Xenon user firmware execution

It’s not necessary to set the setup done flag on a Xenon, only an Argon or Boron. The most common reason for staying in listening mode is that you have a bootloader that needs upgrading. Normally you’d go into safe mode and it would be downloaded from the cloud, but since you’re using the device standalone it will go into listening mode instead of safe mode because there are no credentials set. If you manually flash the system part, make sure you also flash the matching bootloader on the Xenon…