Can't set wifi channels 12 and 13 for MoodleBox wifi

[ralf-krause]

Prerequisites

• I checked the documentation and found no answer
• I checked to make sure that this issue has not already been filed

Describe the bug

I want to set the channel for the MoodleBox wifi to 13. The regulatory country is Germany and all channels from 1 to 13 should be allowed. I can set all channels from 1 to 11 but not 12 and 13.

To Reproduce

1. Go to MoodleBox dashboard
2. Choose the wifi regulatory country to "Germany"
3. Choose wifi channel 13
4. Click on "Change wifi settings"
5. Wait a moment
6. Reload the MoodleBox dashboard
7. The country changed to Germany but the channel is not 13 :-(
8. Take the Android wifi analyser from F-Droid ... the MoodleBox wifi is not on channel 13

Additional context

• Raspberry Pi model 4B
• MoodleBox version 4.7.0
• MoodleBox plugin version 2.17.5 (the preinstalled plugin version)

Screenshots

No, I take no screenshot from MoodleBox 4.7.0.
But I tested MoodleBox 4.5.0 ... and in 4.5.0 the channel 13 can be set for MoodleBox wifi. The WiFi analyser shows the MoodleBox WiFi on the right side. Channel 13 is in the middle of the beacon.