TLDR: not a Nerves issue, it is an issue with my host system.
Some days ago I could test two new RPI Zero W, never used, with a new SD card, with a a proper USB cable and… none of them worked. I couldn’t connect to them, I lost a lot of time figuring out why. It was checking my host dmesg that I thought that maybe the issue was my host 
.
So I burnt a SD card with the example that uses VintageNet Wizard to setup a WiFi network and once I inserted the SD card, it works as expected: setup the AP, the captive portal works, connects to the WiFi network… But accessing it using SSH still didn’t work.
Finally, I tested them in a MacBook Pro (M1): make the firmware, burn the SD, inserted it in each RPi 0 and… it. worked as expected and without any issue.
What happens my host (Manjaro)? I think something was broken in some update of the system, some kernel update, some thing that I changed from the kernel or even some interference with another software.
I will try to figure out what it is the cause of this fail, but in the future, with time to invest in it, because by the moment it works perfectly in the MacBook.
Thank you both for the answers!
Regards,
Iván
