Hello!
I bought a MBA 2013 and from begining I got that problem.
These disconnection were so annoying that I created a little script that check if the router is still reachable. If not, then it will power off the network card and restart it 3 seconds later.
It's running in background so most often, I don't know that the network was reset and even softwares usually don't see it also.
Everytime the script detect that the router is not reachable, it writes it down in a log file. So you can see whenever it happens. I wasn't able to see any patterns... it can be when I use or not the computer, when the screen is off or not...
Sometimes, I saw that when I get inside the room where is the router and the laptop and I go between them, the network will fail. So I see in the log that for a while, there was no reset and exactly at the time I came close to the laptop, it start doing a reset. It could be my phone that I carry with me that triggered this also.
So, to come back to my script, after installing the latest patch from Apple, it's better but still not perfect. So my script is still useful. I share it with you, it automatically detect the router's IP and the WiFi network card.
If you have 2 WiFi network card, I cannot tell if it will detect the right one. But if you edit the script, you can manually modify the parameters at the begining.
You can get the script at this address:
http://justpaste.it/watchdog_wifi_command
You can also get it down here. Put this in a text file (pure text, no RTF or DOC) and in the command line, execute this command
chmod +x watchdog_wifi.command
Good luck!
=========================
watchdog_wifi.command
=========================
#!/bin/bash
###### parameters that you can adjust ######
# Auto-detection of Wi-Fi card ID
# (usually "en0" on macbook air and "en1" on other macbook)
network_id=$(networksetup -listnetworkserviceorder \
| grep Hardware \
| sed -e 's/^(H.*rt: \(.*\), Device: \(.*\))/\1 \2/' -e 's/[()\*#]//g' -e 's/[-]/_/g' \
|grep Wi_Fi| awk '{print $2'})
# If you want to set manually the ID of the network card, use this command and remove #
#network_id=en0
# Auto-detection of the router''s IP (gateway)
router_ip=$(netstat -rn | grep "default" | grep "$network_id" | awk '{print $2}')
# If you want to set manually the IP to check, use this line and remove #
#router_ip=192.168.1.1
# delay between each check (in seconds)
delay_between_ping=5
# delay before switching back the network card on (in seconds)
delay_switch_on=3
###### you should not modify anything else after ######
if [ "$router_ip" == "" ]; then
echo
echo "**********************************************"
echo " You need to connect to a WiFi network first! "
echo "**********************************************"
echo
echo press enter to finish...
read nothing
exit
fi
if [ "$network_id" == "" ]; then
echo
echo "****************************************************************************"
echo " Wi-Fi network card not detected, you have to manually configure the script "
echo "****************************************************************************"
echo
echo press enter to finish...
read nothing
exit
fi
echo
echo "*****************************************************************************"
echo " This script test if the WiFi network card $network_id is working. "
echo " It will ping the router's IP to check it."
echo " Router IP: $router_ip"
echo " If it cannot ping the router, the WiFi card will be turned Off then back On"
echo "*****************************************************************************"
echo
echo "-------------------------"
echo " Press Control+C to quit "
echo "-------------------------"
echo
while true
do
#ping the router
# -t 1 = wait 1 second max for the reply
# -c 1 = only ping once
# $router_ip = IP to ping
# grep "1 packets received" check if we get the right response
echo $(date)
echo Pinging the router to see if WiFi card $network_id is still alive...
ping -t 1 -c 1 $router_ip | grep "1 packets received"
#set the exit code in the variable
exitcode=$?
echo Exit Code: $exitcode
#if exit code is not 0, then we restart the WiFi network card
if [[ $exitcode != 0 ]] ; then
echo $(date) >> watchdog_wifi.log
echo
echo "*************"
echo Stopping WIFI
echo "*************"
/usr/sbin/networksetup -setairportpower $network_id off
echo
echo Waiting $delay_switch_on seconds...
echo
sleep $delay_switch_on
echo "***************"
echo Restarting WIFI
echo "***************"
/usr/sbin/networksetup -setairportpower $network_id on
echo
echo Waiting for network to reconnect...
echo
router_ip=$(netstat -rn | grep "default" | grep "$network_id" | awk '{print $2}')
while [ "$router_ip" == "" ]; do
sleep 1
echo "..."
router_ip=$(netstat -rn | grep "default" | grep "$network_id" | awk '{print $2}')
done
fi
echo
echo Waiting $delay_between_ping seconds
echo
sleep $delay_between_ping
done
vhkim
Level 1
(3 points)
wifiguru
Level 2
(240 points)
