I was trying to build a script that runs when wifi is connected or disconnected. After a lot of searches, I got wpa_cli -a command to work with my script.


case "$1" in
        case "$2" in
                echo WIFI is CONNECTED "$WPA_ID"  > output
                #sudo python ./do.py
                echo WIFI is Disconnected "$WPA_ID" > output
                >&2 echo empty or undefined event for wlan0: ""
                exit 1

I was tested the script by running the command sudo wpa_cli -a /home/pi/test.sh. I disconnected the wifi and checked the output file and it contains " WIFI disconnected message". Similar checking is done by connecting to a wifi and we observed "WIFI connected" message.

But when i tried to run the command wpa_cli in daemon mode, It don't work. I have used the command sudo wpa_cli -a /home/pi/test.sh -B. But this time output file have no change if i connected or disconnected the wifi.

But when i ps aux|grep test.sh, it shows the script is running.


I have got the answer. When I run in daemon mode using sudo wpa_cli -a /home/pi/test.sh -B, I was checking the wrong output file( In the home directory ). In the echo, I have not mentioned the correct path for file output, So it will be redirected to the file output in the root / directory.

Thanks for all

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.