Hej Martin,
thanks for your comment!
Martin Hejl schrieb:
> B wrote:
>> I cannot interpret all of this output, but one can see a lot of receive
>> errors due to bad CRC.
> Sorry, I can't help with that, other than pointing to the obvious - how
> far away from the AP is your laptop?
Oh, I forgot to mention this. Well the distance is less than 2 meters.
> Any concrete walls, ceilings or something like that?
No.
> Is the pigtail for the antenna properly connected?
I tried to take care about this - and controlled it once more after your
hint.
> It's easy to not properly connect those darn little things.
> Channel 1 should usually not be a problem regarding other WIFI networks
> - since at least in my neighborhood, everybody seems to be using channel
> 6 (probably the default on commercial APs).
Yes, I can 'see' about 10 APs in the environment which are located more
far away. Some of them seem to have a lot of more tx-power:
# iwlist ath0 scan | grep Qual
Quality=10/70 Signal level=-85 dBm Noise level=-95 dBm
Quality=5/70 Signal level=-90 dBm Noise level=-95 dBm
Quality=9/70 Signal level=-86 dBm Noise level=-95 dBm
Quality=6/70 Signal level=-89 dBm Noise level=-95 dBm
Quality=14/70 Signal level=-81 dBm Noise level=-95 dBm
Quality=8/70 Signal level=-87 dBm Noise level=-95 dBm
Quality=251/70 Signal level=-100 dBm Noise
level=-95 dBm
Quality=35/70 Signal level=-60 dBm Noise level=-95 dBm
Quality=141/70 Signal level=-210 dBm Noise
level=-95 dBm
Quality=5/70 Signal level=-90 dBm Noise level=-95 dBm
>
>> So my idea is to switch to different channels, but whatever I write in
>> /etc/network/interfaces that is like
>>
>> wireless-channel 11
>>
>> with different channelnumbers or simply left, I always get the same
>> result, the AP working on channel 1:
> Odd. Are you using WPA?
Not yet. I switched encryption off, because I had connection troubel and
I'm now in the state of having found the cause: The mentioned low link
quality.
If so, you might want to try adding
>
> channel_policy=2
> channel=11
>
> in your hostapd.conf (then restart hostapd, and then "ifdown ath0" and
> "ifup ath0"). Maybe that will solve the issue.
I'm going to switch on WPA and will try to switch channels using those
parameters.
>
>> PS: Im using a wlm54g23 in an alixbox (www.pcengines.ch/wlm54g23.htm).
>> It should support 13 channels in Europe.
> Is it set to the country code of Germany
Yes
(I assume Germany due to your
> email address)? 276 would be the one, I think.
Absolutely right!
> But it wouldn't matter for setting channel 11 - that should work no
> matter what country code is configured.
>
> I hope that helps
Well, thanks a lot. I will try....
As far as I am experimenting, I might be affected by
http://madwifi.org/ticket/1343
Boris
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