wifi monitor to troubleshoot Yun wifi - Results

RESTART_... = true,
sketch: simple LED blink
2014-07-25 08:11 : wifi OK, uptime=6:59:04.868013, ok/nok: 2310/3
no particular pattern

wifi monitor to troubleshoot Yun wifi

My Yun's wifi seems to be very unstable.

I created a python script to monitor the Yun's wifi connection.

This script can be downloaded here.

The main script is wifiMonitor.py

There are 4 things that are supposed to be configured (see wifiMonitor.py):

LOGFILE="/tmp/wifiMonitor"
LOGFILESD="/mnt/sda1/arduino/wifiMonitor_"
RESTART_WIFI_WHEN_LOST = True
TO_PING = "192.168.1.1"

The first 2 give the location of where the logs are stored: LOGFILE is the main destination, with now and then a backup to LOGFILESD.
When it sees the wifi coonection is lost, it will either:
- do nothing (just wait and hope it gets restored)
- restart the Yun's wifi
This is configured by the RESTART_WIFI_WHEN_LOST option.
To determine if the Wifi is ok, it will ping a particular site or IP address. This is set by the TO_PING option. In my case I just ping my router.

In short the script will now and then ping to TO_PING site to determine if Wifi is ok and do the appropriate action if not. It logs the ratio of ok/not_ok and the current uptime.

Arduino Yun Wifi stuff (reset, access point mode, ...)

The Yun has 3 reset buttons: one of those is a Wifi reset button (WLAN Rst)

Depending on how long you press the button the following will happen (I think):

• Pressing the WLAN Rst button for <5 sec does not do any reset at all, correct (it just lets a LED blink)
• Pressing the Wifi Rst button for >=5 but <30 sec will run the wifi-reset-and-reboot script. This script will return the Yun in access point (AP) mode and will reboot the Yun. The Yun should then present its network SSID.
• Pressing for >= 30 sec will restore some factory settings

If you just want to reset the Wifi, you can do this with the wifi script (should be in /sbin):

    root@Arduino:/tmp# wifi down && sleep 5 && wifi
    Successfully initialized wpa_supplicant

You probably can also do:

    ifconfig wlan0 down; ifconfig wlan0 up

Note that rc.local contains by default the entry wifi-live-or-reset. After the Yun boots, it will check for the configured Wifi network. If it is not found within 60sec, the Yun will go into access point mode.

git stuff

general:

git add .
git commit .
git push origin master
git reset .
git rm
vi .gitignore

to remove local changes from (uncommitted) file:

git checkout filename

when creating a new project on gitHub, get it on PC:

mkdir wifiMonitor
cd wifiMonitor/
git init
git remote add origin https://github.com/NicoLugil/wifiMonitor
git remote -v
git fetch origin
git merge origin/master

After creating gh-pages (project page) using website, get it on local copy:
https://help.github.com/articles/creating-pages-with-the-automatic-generator
in essence:

cd repository
git fetch origin
# remote: Counting objects: 92, done.
# remote: Compressing objects: 100% (63/63), done.
# remote: Total 68 (delta 41), reused 0 (delta 0)
# Unpacking objects: 100% (68/68), done.
# From https://github.com/user/repo.git
#  * [new branch]      gh-pages     -> origin/gh-pages

git checkout gh-pages
# Branch gh-pages set up to track remote branch gh-pages from origin.
# Switched to a new branch 'gh-pages'