thank you for trying to help!
I now tried Particle CLI, as far as I can see, same result, see below
> I have detected a Photon connected via USB.
? Would you like to continue with this one? Yes
! The Photon supports secure Wi-Fi setup. We'll try that first.
! PROTIP: Wireless setup of Photons works like a wizard!
! PROTIP: We will automagically change the Wi-Fi network to which your computer is connected.
! PROTIP: You will lose your connection to the internet periodically.
> No nearby Photons detected. Try the `particle.js help` command for more information.
? Would you like to wait and monitor for Photons entering setup mode? No
> Ok, bye! Don't forget `particle.js help` if you're stuck! <3
C:\Dev\nodejs>
I probably also should have mentioned, that the LED next to D7 is blue (see red arrow).
That LED was off in the first Photon, where I could setup successfully.
Now reading Photon led d7 stuck high and AVOID factory reset - What to do with unexpected LED behavior on a Photon
I will try some more suggestions from there…
Tukan