[arm-allstar] WIFI Issue

Wed Aug 16 19:21:57 EST 2017

I'll just throw this out there. On the PlanePlotter group, when the message rate drops to zero over night, the WiFi has been known to shut off.The fix was to add a ping to keep alive. I think the answer was to set up a cron (?) event.
Fred N7FMH 

Sent via the Samsung GALAXY S® 5, an AT&T 4G LTE smartphone

-------- Original message --------
From: Doug Crompton via arm-allstar <arm-allstar at hamvoip.org> 
Date: 8/16/17  20:05  (GMT-05:00) 
To: ARM Allstar <arm-allstar at hamvoip.org> 
Cc: Doug Crompton <wa3dsp at gmail.com> 
Subject: Re: [arm-allstar] WIFI Issue 

Like Dave I have not seen this issue. I have several nodes running on wifi
without an issue and long uptimes. Also I might point out we have numerous
portable nodes online that are constantly up and down using wifi and it
just works.

I know there have been problems with the Allstar registration server and
the only way to solve it is to go down for 5 or 10 minutes and come back
up. I think what we need to determine is it an Allstar issue or a WIFI
issue. From what you are saying the WIFI connects and is visible at the
router. This would lead me to believe that Allstar is not registering. When
this happens can you ssh into the Pi? Or if not connect a monitor and
keyboard and see if it registered and downloaded the nodelist. This would
be very helpful in troubleshooting.

*73 Doug*

*WA3DSP*

*http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*

On Wed, Aug 16, 2017 at 5:52 PM, "David McGough via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

>
>
> Hi Tom,
>
> I'm interested to hear about your sporadic WiFi issues, I'm not sure what
> the cause could be.
>
> I run *ALL* my RPi3 nodes, whether test/development or live/production,
> via WiFi. I don't have any RPi3 wired by Ethernet cable, anywhere. And, I
> never recall any network hiccups that weren't from my own causing...I do
> run static IP addresses everywhere.
>
> ...For some examples, on my development AP (a ubnt bullet M2), I've got an
> uptime of 173 days. And, I just checked a in-cabinet LocoM2 AP at a
> production site and have an uptime of 301 days!  My production RPi3 boards
> only currently have an uptime of 11 days, since that was when I pushed out
> my most recent beta-test code to them and rebooted. I've got a couple
> developement RPi3's, which include NFS mounted dev filesystems that have
> been up 60+ days.
>
> I've found the key to stability is good power to the RPi3's and high
> quality (which doesn't mean expensive!) Access Points.
>
> For in-cabinet or close range WiFi use, make sure to turn the RPi3 and AP
> TX power WAY down...I usually set to about 0dBm (iwconfig wlan0 txpower 0
> ...or maybe 10)....Even with the power turned down my signal strength is
> in the -40's.
>
>
> 73, David KB4FXC
>
>
>
>
> On Wed, 16 Aug 2017, "Tom Hayward via arm-allstar" wrote:
>
> > I've often had RPis stop responding over wifi. I wrote a script that I
> > run on the Pi to resolve the problem (rather primitively):
> >
> > /home/pi/check_network_and_reboot:
> > #!/bin/bash
> > ROUTER_IP=192.168.1.1
> > ( ! /bin/ping -c1 $ROUTER_IP >/dev/null 2>&1 ) && sudo /sbin/shutdown
> > -r now >/dev/null 2>&1
> >
> >
> > Then I have a crontab like this:
> > */10 * * * * /home/pi/check_network_and_reboot
> >
> > The script reboots the Pi when the networking stops working. In my
> > experience a reboot is all that has been necessary to get the wifi
> > working again.
> >
> > Tom KD7LXL
> >
> > On Wed, Aug 16, 2017 at 1:47 PM, "Dave P via arm-allstar"
> > <arm-allstar at hamvoip.org> wrote:
> > > Greetings Doug,
> > >
> > > Jim NH6HI and I are troubleshooting an issue with another ham's RPI3
> > > system.  WA8WNK Nodes 45756/57.
> > >
> > > He shut down his system (connected with WiFi) before he left on
> Vacation.
> > > With the storms in San Antonio, Texas it was a wise move.  Upon
> returning
> > > home and firing up his equipment, he sees all the devices are
> recognized on
> > > his wireless router to include the RPI3 WIFI connection.
> > >
> > > He notices his node is not being recognized on the allstarlink page.
> > > Although, his CISCO Wifi router shows the RPI3 is on the DHCP list
> table.
> > > We are unable to putty to the WIFI address of the RPI3.  I had owner
> Lee
> > > connect the RPI3 via ethernet and I was able to SSH in with no
> problem.  I
> > > did notice when I tried to perform an update option 1 that I go an
> error
> > > message that the update failed.
> > >
> > > At this point, I am having Lee get a new MicroSD card and lets rebuild
> the
> > > nodes again.  Jim mentioned it could be a power spike may have
> corrupted
> > > the MicroSD card or some anomaly.
> > >
> > > (Additionally on the same subject of WiFi problems, we have a node
> 45655 on
> > > Maui that went through a power outage while Jim NH6HI was on the phone
> with
> > > the owner. When the power came back, the node wouldn't reconnect via
> Wifi.
> > > He ran the wifi setup again and upon rebooting,  no wifi connection
> even
> > > though it was able to complete the setup successfully. The setup was
> tried
> > > several times to no avail.  For the interm it is connected with an
> ethernet
> > > cable. We will be rebuilding the node on a new microSd card in the near
> > > future to make sure this isn't a hardware problem.  It looks like the
> Pi
> > > needs battery backup as this problem has not reared it's head on
> battery
> > > powered systems.)
> > >
> > > Just wanted to pass information if you ever encountered this issue.
> > >
> > > 73 and aloha
> > >
> > > Dave - AH6OD
> > > _______________________________________________
> > >
> > > arm-allstar mailing list
> > > arm-allstar at hamvoip.org
> > > http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> > >
> > > Visit the BBB and RPi2/3 web page - http://hamvoip.org
> > _______________________________________________
> >
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> >
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> >
>
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>
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>
>
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