#!/system/bin/sh

# source configuration

log=/data/local/wifi.log
check_interval=10

#
exec 1> /dev/null
exec 2>> $log
echo $(date) > $log
# without check_interval set, we risk a 0 sleep = busy loop
if [ ! "$check_interval" ]; then
        echo "No check interval set!" >> $log
        exit 1
fi

startWifi () {
        wpa_cli -iwlan0 -p/data/misc/wifi/sockets/ reconnect
}

startWifi

while true; do
    ONL=$(wpa_cli -iwlan0 -p/data/misc/wifi/sockets/ status | grep -c "ssid=VIETTEL - SLHNB");
        if [ "$ONL" = 0 ]; then
                echo $(date) " Attempting reconnect..." >> $log
                echo 1 >/sys/class/leds/button-backlight/brightness
                startWifi
                sleep 3
             else
                echo 0 >/sys/class/leds/button-backlight/brightness
                sleep $check_interval
        fi
done