Beaglebone black : Using Systemd service to make wireless stable is not working as expected

[Upol Ryskulova]

Hello,

I followed every steps in adafruit setting wifi page to obtain stable wireless on BBB (rev C, kernel version 3.8.13-bone71).  And read from google group that most got stable wiereless by disabling HDMI. Since I need hdmi for now I followed second solution by running script at boot time. So I created a systemd service that will run script, basically it gets network interface number from the command iwconfig and replaces previous wlanNO in interface file and ifup --force wlanCurrent. Service that I wrote is as follows 

[Unit]

Description=Ifup wlan automatically

after=wpa_supplicant.service

Requires=wpa_supplicant.service

[Service]

Type=oneshot

RemainAfterExit=true

ExecStart=/usr/testifup/ifupscript.sh

[Install]

WantedBy=multi-user.target

Enabled this service. Rebooted bbb. But no use. Sometimes it successes but sometimes it fails. I observed service status. It nevoler exits with fail error but wpa_supplicant service sometimes messages giving network problem and does not set static IP I assigned in the interface file. So it gives random IP. I guess if my created service runs before some unkown service it fails to ifup wlanNo if other way around it success and assigns static IP.  How can I arrange this? Which service is causing this issue? Could you please help me?

Regards,

Upol

[Upol Ryskulova]

PS: sorry for mistake. google group link is here. 

[Neabex]

Upol,

I'm not sure what is wrong with your approach but what we're doing is executing "systemctl restart connman" in a periodic service when we think something's wrong with the wifi.

[DeKay]

I posted this link in another thread a few days ago.  This solution worked great for me on an image from a few months back.  I highly suggest taking this route:

http://madscientistlabs.blogspot.ca/2015/01/wifi-on-beaglebone-black-with-systemd.html

[Upol Ryskulova]

Hello Neabex,

thak you for your reply. As far as I know connman is for angstrom distribution, but mine is debian.  I was able to overcome this problem by sleep'ng 30sec in the script that service will execute.

Dekay currently I am ok with my solution if something goes wrong I will try your approach. Thank you.

[Brian Anderson]

Connman is installed in the latest Debian Jessie full testing images. It works fine for me for managing WiFi. I can't say whether Connman is installed in the console images as I have not used them. I posted some additional information in this thread: https://groups.google.com/forum/m/#!category-topic/beagleboard/rRHUR8mltmg

[Upol Ryskulova]

Hello Brian, sorry for not giving full information about BBB, mine is debian wheezy latest stable image (3.8.13-bone70). How can I get stable wireless in this wheezy? For one week wireless was stable but now it is not. hdmi is not disabled. 

On Tue, Apr 7, 2015 at 5:23 PM, Brian Anderson <b...@nwlink.com> wrote:

Connman is installed in the latest Debian Jessie full testing images. It works fine for me for managing WiFi.  I can't say whether Connman is installed in the console images as I have not used them.  I posted some additional information in this thread: https://groups.google.com/forum/m/#!category-topic/beagleboard/rRHUR8mltmg

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[Upol Ryskulova]

Now, oddly it got its' static IP address after the boot. When I ping, it hangs there. Also I cannot connect to BBB using its static IP address. 

I removed all services that enables wireless except service that I created for ifup and ifdown currently available wlan interface.