It's simple..
If you have Airplane LED on your laptop then you wont need to run pings and stuff to see if you have Internet access, because:
Airplane LED ON = No Internet Access
Airplane LED OFF = Internet Access
Install:
$ git clone https://github.com/alirezarpi/air-net-led.git
$ cd air-net-led/
$ chmod +x air-net-led.sh && sudo cp air-net-led.sh /usr/bin/
Remember to run it as root user ( $ sudo air-net-led.sh & )
Also you can use more flexible script that you can specify Target and Request Count with it to monitor any host.
$ chmod +x air-net-led-flex.sh && sudo cp air-net-led-flex.sh /usr/bin/
Remember to use it as root user ( $ sudo air-net-led-flex.sh ) too.
You can do
$ sudo mv air-net-led.service /etc/systemd/system/ && sudo systemctl enable air-net-led.service
to run at boot time.
NOTE: Tested on Asus Laptops -Debian Base-
Hope you enjoy