Check all GPIO pins

gpio.sh

#!/bin/bash
if [ "$EUID" -ne 0 ]
        then echo "Run this script as root"
        exit
fi

cd /sys/class/gpio
touch export
for i in {1..27}
        do
                echo "Exorting pin $i"
                echo $i >> export
                sleep 0.2
                echo "Set direction out of pin $i"
                echo "out" > gpio${i}/direction
                sleep 0.2
                echo "Set value to 1 of pin $i"
                echo "1" > gpio${i}/value
                sleep 2.0
                echo "Unexport pin $i"
                echo $i > unexport
        done