sample script which is stopping/starting aawgd based on nearby WiFi network visibility

wifi-checker.sh

#!/bin/sh
# this is a sample script which is testing if there is available ESSID on the WiFi
# and according to the result it is starting/stopping aawgd
# more info: https://github.com/nisargjhaveri/WirelessAndroidAutoDongle/issues/212#issuecomment-2692423007

delaytime=5
essid="searchedAPName"

while [ true ]; do
    wifiavail='iw dev wlan0 scan|grep SSID'
    if echo "$wifiavail" | grep -q "$essid"; then
        /etc/init.d/S93aawgd stop
    else
        /etc/init.d/S93aawgd start
    fi
    sleep $delaytime;
done