Update: I installed a moodlebox-3.12.0.img on a different micro sd card.
There is no problem with the wifi signal as the following ping test shows.
Version 3.12.0, 2021-07-11.
64 bytes from 10.0.0.1: icmp_seq=499 ttl=64 time=3.52 ms
64 bytes from 10.0.0.1: icmp_seq=500 ttl=64 time=3.09 ms
64 bytes from 10.0.0.1: icmp_seq=501 ttl=64 time=4.48 ms
64 bytes from 10.0.0.1: icmp_seq=502 ttl=64 time=16.1 ms
64 bytes from 10.0.0.1: icmp_seq=503 ttl=64 time=2.50 ms
--- 10.0.0.1 ping statistics ---
503 packets transmitted, 503 received, 0% packet loss, time 502796ms
rtt min/avg/max/mdev = 1.398/7.450/323.424/24.228 ms
So I plan to work with version 3.12.0.
I am though ready to do inquiries why version 4.0.0 has problems if somebody can show me how to enable debugging / tracing of the access point activities.
But as for moodlebox version 3.12.0
I do not know the moodle admin account user name and password for 3.12.0. I did not find it on the moodlebox.net website. Could somebody help me please?