max clients supported with duovero zephyr as access point

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max clients supported with duovero zephyr as access point

Trupti Gawhane
I have a duovero zephyr configured as an access point. I can only
connect 10 devices to the AP at the same time. Is this a hardware
limitation? How can the number of clients be increased ?

I use hostapd.

/etc/hostapd.conf
interface=uap0
driver=nl80211
channel=7
ssid=duovero
ignore_broadcast_ssid=0


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Re: max clients supported with duovero zephyr as access point

Scott Ellis
What do you see from hostapd when the 11th client tries to connect?

If you are using this example

http://www.jumpnowtek.com/gumstix/duovero/Duovero-Access-Point.html

Then run hostapd in the foreground like this

root@duovero:~# /etc/init.d/hostapd stop

root@duovero:~# /usr/sbin/hostapd /etc/hostapd.conf

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Re: max clients supported with duovero zephyr as access point

Trupti Gawhane
Yes, I did mostly.
I built the gumstix-console-image from meta-gumstix-extras and included
the recipe for hostapd from meta-duovero.

So, the uap interface is not created by default.
Instead, I created the access point using iw;
iw dev mlan0 interface add uap0 type __ap

I used dnsmasq and not dhcp-server.

Here's what happened after I ran hostapd in the foreground;

root@duovero:~$  /usr/sbin/hostapd /etc/hostapd.conf
Configuration file: /etc/hostapd.conf
uap0: Could not connect to kernel driver
Using interface uap0 with hwaddr x:x:x:x:x:e9 and ssid "duovero"
uap0: interface state UNINITIALIZED->ENABLED
uap0: AP-ENABLED
uap0: STA x:x:x:x:x:b6 IEEE 802.11: associated
uap0: AP-STA-CONNECTED x:x:x:x:x:b6
uap0: STA x:x:x:x:x:b6 RADIUS: starting accounting session
386D868C-00000000
uap0: STA x:x:x:x:x:3f IEEE 802.11: associated
uap0: AP-STA-CONNECTED x:x:x:x:x:3f
uap0: STA x:x:x:x:x:3f RADIUS: starting accounting session
386D868C-00000001
....
.... a couple of disconnects and reconnects
....
uap0: STA x:x:x:x:x:d1 RADIUS: starting accounting session
386D868C-0000000E
uap0: STA x:x:x:x:x:81 IEEE 802.11: disassociated <-- 11th device tries
to connect, connection refused on device
uap0: STA x:x:x:x:x:81 IEEE 802.11: disassociated <-- try again,
connection refused on device

uap0: STA x:x:x:x:x:81 IEEE 802.11: disassociated  is the only error.

After about 10 minutes, I hit a continuous dump of this error stack
which wouldn't stop until reboot..

BUG: scheduling while atomic: swapper/1/0/0xffff0000
Modules linked in: rfcomm bnep btmrvl_sdio btmrvl bluetooth mwifiex_sdio
mwifiex firmware_class cfg80211 rfkill ipv6
[<c0014c84>] (unwind_backtrace+0x0/0x11c) from [<c049423c>]
(__schedule_bug+0x48/0x60)
[<c049423c>] (__schedule_bug+0x48/0x60) from [<c049a26c>]
(__schedule+0x68/0x798)
[<c049a26c>] (__schedule+0x68/0x798) from [<c000f0b0>]
(cpu_idle+0x104/0x120)
[<c000f0b0>] (cpu_idle+0x104/0x120) from [<804902d4>] (0x804902d4)


On 12/08/14 22:37, Scott Ellis wrote:

> What do you see from hostapd when the 11th client tries to connect?
>
> If you are using this example
>
> http://www.jumpnowtek.com/gumstix/duovero/Duovero-Access-Point.html
>
> Then run hostapd in the foreground like this
>
> root@duovero:~# /etc/init.d/hostapd stop
>
> root@duovero:~# /usr/sbin/hostapd /etc/hostapd.conf
>
>
>
>
>
> --
> View this message in context: http://gumstix.8.x6.nabble.com/max-clients-supported-with-duovero-zephyr-as-access-point-tp4969406p4969409.html
> Sent from the Gumstix mailing list archive at Nabble.com.
>
> ------------------------------------------------------------------------------
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