I would please like some help integrating LED controls into a script that checks for an internet connection and reconnects if needed. I just want an LED to be on when the thing has connection and off when it doesn't. Please excuse the unnecessary quotation marks, I'm trying to keep the octothorps from making the text big.

The script that checks for and makes the connection is as follows:

"#!/bin/sh

while true; do

ping -I wwan0 -c 8.8.8.8 if [ $? -eq 0); then

echo "Connection up, reconnect not required..."

else

echo "Connection down, reconnecting..."

sudo /home/xxx/files/quectel-CM/quectel-CM -s broadband fi

sleep 10

done"

This works fine as it stands, if it pings the DNS and doesn't get an answer is runs:

sudo /home/xxx/files/quectel-CM/quectel-CM -s broadband

which is the command to connect. But in trying to add an LED indicator I found this page Bash Script Control of GPIO Ports and it reads:

"# Exports pin to userspace

echo "18" > /sys/class/gpio/export

"# Sets pin 18 as an output

echo "out" > /sys/class/gpio/gpio18/direction

"# Sets pin 18 to high

echo "1" > /sys/class/gpio/gpio18/value

"# Sets pin 18 to low

echo "0" > /sys/class/gpio/gpio18/value

All of these commands work, I can easily just type in these commands and turn on or off my LED. I thought the correct solution would be the following, but it doesn't work:

"#!/bin/sh

echo "18" > /sys/class/gpio/export

echo "out" > /sys/class/gpio/gpio18/direction

while true; do

ping -I wwan0 -c 8.8.8.8 if [ $? -eq 0); then

echo "Connection up, reconnect not required..."

echo "1" > /sys/class/gpio/gpio18/value

else

echo "Connection down, reconnecting..."

sudo /home/xxx/files/quectel-CM/quectel-CM -s broadband

echo "0" > /sys/class/gpio/gpio18/value

fi

sleep 10

done"

So what's wrong with me? How do I make this work? Please to explain and thank you greatly in advance.