Re: [Madwifi-users] Card won't transmit?

[Andrew <ae...@co...>]

Michael Renzmann wrote:

> Hi.
>
> Andrew wrote:
>
>> ``iwconfig ath0 channel 6"
>
>
> Normally you don't need to specify a channel. While the card is in 
> managed mode, it will choose a channel automatically.
>
>> ``iwconfig ath0 essid HOME"
>
>
> You set the essid to HOME here, but...
>
> > iwlist scanning:
> > ath0      Scan completed :
> >          Cell 01 - Address: 00:50:F2:73:3C:32
> >                    ESSID:"tjhumphrey-home"
> >          Cell 02 - Address: 00:09:5B:86:C1:44
> >                    ESSID:"NETGEAR"
>
> ... you don't have any AP running with that essid. Therefor you should 
> either change the essid to any (which should cause the card to choose 
> one among all those available APs, that allow association without 
> explicit knowledge of the essid), or to one of the two listed above 
> ("tjhumphrey-home" or "NETGEAR" - caution, case sensitive!).

I have the SSID broadcast turned off on my router.  Would that be a problem?

>
> Something else worth mentioning:
>
> > iwlist ap:
> > ath0      Peers/Access-Points in range:
> >    00:50:F2:73:3C:32 : Quality:4/0  Signal level:-91 dBm  Noise
> > level:-95 dBm (updated)
> >    00:09:5B:86:C1:44 : Quality:2/0  Signal level:-93 dBm  Noise
> > level:-95 dBm (updated)
>
> You have damn bad signals from those two APs. The signal is just above 
> the noise level, so it's very hard for your card to determine if a 
> packet has been sent by the AP. The result is an instable connection 
> (if any) with very low speed and lots of retransmissions. You might 
> want to place the antenna of your card at another place, or use a 
> better antenna instead. What's the distance between you and those two 
> APs?
>
>> Here is iwconfig now:
>>
>> ath0      IEEE 802.11g  ESSID:"HOME"          Mode:Managed  
>> Frequency:2.417GHz  Access Point: FF:FF:FF:FF:FF:FF          Bit 
>> Rate:1Mb/s   Tx-Power=16 dBm   Sensitivity=0/0          Retry:off   
>> RTS thr:off   Fragment thr:off
>>          Encryption key:<24-digit hex key>   Security mode:open
>>          Power Management:off
>>          Link Quality:0/0  Signal level:-95 dBm  Noise level:-95 dBm
>>          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
>>          Tx excessive retries:0  Invalid misc:0   Missed beacon:0
>
>
> The line with "Access Point: FF:FF:FF:FF:FF:FF" says: your card has no 
> association with any AP, ...
>
>> ath0      Link encap:Ethernet  HWaddr 00:09:5B:C8:3C:B5          inet 
>> addr:192.168.0.3  Bcast:192.168.0.255  Mask:255.255.255.0
>>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>>          RX packets:1074 errors:2854 dropped:0 overruns:0 frame:2849
>>          TX packets:22 errors:0 dropped:0 overruns:0 carrier:0
>>          collisions:0 txqueuelen:199
>>          RX bytes:78438 (76.5 Kb)  TX bytes:1100 (1.0 Kb)
>>          Interrupt:9 Memory:e08ee000-e08fe000
>>
>> ...Over 1000 packets were received (with over 2000 errors!?), yet 
>> only 22 were sent.  Why?
>
>
> ... therefor these isn't much your card could send out (to whom should 
> it send data). On the other hand, that doesn't stop your card from 
> seeing packets from others. The high number of errors is assumably 
> caused by the bad signals you have from the above two APs.
>
>> ath0      Fixed period  ;  min timeout:67.1078s
>>                           max timeout:1.024ms
>
>
> Note to the devs: shouldn't this be the other way round, thus "min 
> timeout: 1.024ms, max timeout 67.1078s"?
>
> Bye, Mike
>
I supposed I need a new antenna.  Can anyone recommend one?  I believe 
the WG311T has a MMCX connector.

Mike: Sorry, I didn't realize I replied directly to you.  "Where are 
replies to list messages directed?" should be set to "This list", IMHO.