mcgyver83
Posts: 361
Joined: Fri Oct 05, 2012 11:49 am

Raspberry disconnected from wifi randomly

Sat Aug 23, 2014 7:58 am

I have a raspberry with wifi usb dongle.
I use open wifi with mac address access control.
Everything works fine for 1 day, 3 days, 5 hours, after the rasp loose wifi signal. Sometimes it reconnect itself again, other times I have to unplug power cord.
Where can I look for info in logs?
Signal is around 80% ( I checked when I configured the wifi from a panel in lxde env).

fruitoftheloom
Posts: 23027
Joined: Tue Mar 25, 2014 12:40 pm
Location: Delightful Dorset

Re: Raspberry disconnected from wifi randomly

Sat Aug 23, 2014 9:51 am

There are some USB WiFi Adaptors which have "Power Save" Mode, you will need to check the settings...
Rather than negativity think outside the box !
RPi 4B 4GB (SSD Boot)..
Asus ChromeBox 3 Celeron is my other computer...

mcgyver83
Posts: 361
Joined: Fri Oct 05, 2012 11:49 am

Re: Raspberry disconnected from wifi randomly

Sat Aug 23, 2014 11:25 am

Were can I check?There is a config file somewhere?
If my wifi can go to Power save mode, it will wake up itself when someone try to access it?

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mahjongg
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Joined: Sun Mar 11, 2012 12:19 am
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Re: Raspberry disconnected from wifi randomly

Sat Aug 23, 2014 1:22 pm

not config.txt!

search the forum using google

use

Code: Select all

site:http://www.raspberrypi.org/forums power save mode

fruitoftheloom
Posts: 23027
Joined: Tue Mar 25, 2014 12:40 pm
Location: Delightful Dorset

Re: Raspberry disconnected from wifi randomly

Sat Aug 23, 2014 1:48 pm

mcgyver83 wrote:Were can I check?There is a config file somewhere?
If my wifi can go to Power save mode, it will wake up itself when someone try to access it?
https://www.google.co.uk/search?q=site% ... wifi+dmesg
Rather than negativity think outside the box !
RPi 4B 4GB (SSD Boot)..
Asus ChromeBox 3 Celeron is my other computer...

mcgyver83
Posts: 361
Joined: Fri Oct 05, 2012 11:49 am

Re: Raspberry disconnected from wifi randomly

Mon Aug 25, 2014 5:44 am

Thanks.

If I run

Code: Select all

iwconfig wlan0
wlan0     IEEE 802.11bgn  ESSID:"Vodafone-mcg"  Nickname:"<WIFI@REALTEK>"
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:24:89:E6:B8:3C
          Bit Rate:72.2 Mb/s   Sensitivity:0/0
          Retry:off   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=100/100  Signal level=57/100  Noise level=0/100
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Bit Rate:72.2 Mb/s   Sensitivity:0/0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0
So Power management is off :(

DirkS
Posts: 10345
Joined: Tue Jun 19, 2012 9:46 pm
Location: Essex, UK

Re: Raspberry disconnected from wifi randomly

Mon Aug 25, 2014 10:21 am

From another post I gather that you're using the same dongle as mentioned in http://www.raspberrypi.org/forums/viewt ... 36&t=81259.
If you follow the link there (http://www.raspberrypi.org/forums/viewt ... 28&t=61665) you'll get to some more (driver specific) settings to disable power management.
The poster does not say if it helped him, though...

Gr.
Dirk.

mcgyver83
Posts: 361
Joined: Fri Oct 05, 2012 11:49 am

Re: Raspberry disconnected from wifi randomly

Fri Aug 29, 2014 11:37 pm

Strange thing happens: I'm connected via wifi to my home network, raspberry was not reacheable by ssh and local ip address but I can access Webmin instance on the raspberry using the dynamic dns hostname :o :o :o
Router admin panel displays the raspberry as connected to the wifi but not "active" :geek:

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