OK, success after about 35 minutes !! Two (2) sets of LESSONS LEARNED below, one set for each Nixie clock I worked to changeover to a new network this weekend.
LESSONS LEARNED SET #1: After finding Carl's CLRNET procedure reference in the RECOVERY MODE section of the MOD-SIX Lumina manual (Appendix K), I performed that and saw an initial "Lost IP" message on reboot, but the old IP came back. Turns out it was only temporary because I don't think I went out through -EXIT- after entering CLRNET. (I also turned off the old router just in case MOD-SIX Lumina clock was locking up to it faster than I was trying to leave it. I don't think that had any bearing on my eventual success.) I repeated the CLRNET with -EXIT- this time, and the "Lost IP" message stuck and repeated.
Then the battle was with my phone connecting to the MOD-SIX network. I had my phone within a foot or two of the clock (even though it was at the top of a set of shelves). It seemed to be hit or miss if the MOD-SIX network would show up (but it was no longer shown as "disconnected" as yesterday...PROGRESS). But it did show up occasionally. And finally, once it did, I went into the setup and selected the new network, but it didn't work at first (there is a new mesh router satellite repeater with the new network withinh 15 feet of the MOD-SIX Lumina, so distance should not be an issue). After several "rinse and repeat" cycles, the MOD-SIX finally asked for the password, which I entered (documented in the Lumina manual). I entered the MOD-SIX password and then had to wait for the network list to show up on my phone to choose from. Once that did, I selected the new network, entered that password, and success. WHAT A RELIEF !!!
Thanks to all for the suggestions. (Changing the new router SSID to be the same as the old network was NOT an option. Too many WiFi devices were already on it, and the family was very happy with the new mesh router satellite connectivity around the house. I didn't dare change that for fear of my life...)
LESSONS LEARNED SET #2: And one OTHER rather interesting WiFi changeover lesson learned. This was with my Dalibor Farny R|Z568M Zen clock yesterday which took me about 2 hours. Turns out the app Dalibor has you use (Android for me) to change WiFi networks has an issue with newer phones. On my Pixel 8, the buttons would not function (so I could not select a network !!). After trying several times on my new phone to connect to a network but without buttons working, I carefully read the instructions line by line and found a note that stated if issues with the app arose, try an older phone. So I dug out my (now old) Pixel 3 XL phone (now WiFi only), and it allowed the buttons in the app to function to select a new network !!! Whew, thank goodness that finally worked as I was worn out by this point, and thanks to the web page for documenting that "feature" !!!
So those two Nixie clocks were the big challenges of the weekend and are now on the new network. Again, thanks to Carl for pointing out the CLRNET mode for the MOD-SIX Lumina to close out this thread !!
Cheers,
Jon J.