Wifi scanner for FreeBSD

Peter Cornelius pcc at gmx.net
Wed Apr 7 09:33:02 UTC 2021

Hola Matthias, muy buen dia,
> Which channel you would suggest?

That depends. On your environment, the neighbourhood of APs (and probably a lot of other radiating sources in your area as others have pointed out).
If you only look at WiFi, however, channels 1, 5, 9, and 13 may be a good choice -- if you use 802.11g/n and no one else nearby is on 802.11b or n only ([1], [2], and assuming that you're in the EU).

> Thanks for any hint what I could do.

That is difficult but maybe you can tell the phone not to attempt to go up to bandwidths above a certain bandwidth, or tell the AP not to. That reduces throuhgput but may lead to more stable connections in a noisy or edge-case environment. Other than that, I'd also be pretty much out of ideas, sorry.



[2] https://upload.wikimedia.org/wikipedia/commons/8/84/NonOverlappingChannels2.4GHzWLAN-en.svg


Gesendet: Dienstag, 06. April 2021 um 13:49 Uhr
Von: "Matthias Apitz" <guru at unixarea.de>
An: "Peter Cornelius" <pcc at gmx.net>
Cc: freebsd-questions at freebsd.org
Betreff: Re: Re: Wifi scanner for FreeBSD
El día lunes, abril 05, 2021 a las 09:12:27a. m. +0200, Peter Cornelius escribió:

Hi Peter,

The AP at home has only support for 2.4 GHz and my devices (FreeBSD laptops,
Linux laptops and a bunch of E4.5 Ubuntu cellphones) perhaps also only
for 2.4 GHz.

Which channel you would suggest?

The question has todo with one of the BQ E4.5 Ubuntu cellphones
I have here in my family: It connects fine with *any* AP outside my house
(in my company, public APs and even using my iPhone 8 as AP in personal
hotspot mode). But it does not work with the AP in question. It
connects, get an IP assigned but traffic to/from get stuck. Maybe some
interference which affects only this device. It was not always this way,
it started from one day to the other...

Thanks for any hint what I could do.

Matthias Apitz, ✉ guru at unixarea.de, http://www.unixarea.de/ +49-176-38902045
Public GnuPG key: http://www.unixarea.de/key.pub[http://www.unixarea.de/key.pub]
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