[arm-allstar] WIFI Issue

[Tom Hayward]

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
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