Bash blink code using gpiod

RPix-blink.sh

#!/usr/bin/env bash

set -e

gpiodetect > /dev/null 2>&1
if [ $? -ne 0 ]; then
	echo "Debian package gpiod not installed..."
	apt-get update
	apt-get install gpiod
fi

chip="0" 
line="16"

if [ ! -z $1 ] && [ ! -z $2 ]; then
	chip=$1
	line=$2
fi

echo "Using chip $chip and line $line"

handle_sigint(){
	echo "Received SIGINT, exiting..."
	gpioset $chip $line=0
	exit 0
}

trap handle_sigint SIGINT

while : ;do
	gpioset $chip $line=1
	echo "On"
	sleep 0.5

	gpioset $chip $line=0
	echo "Off"
	sleep 0.5
done