Send 1hz pulse to all Raspberry Pi GPIO pins for testing, using bash

pi_gpio_fuzz.sh

#!/bin/bash

pins=( 4 25 24 23 22 21 18 17 )

for pin in "${pins[@]}"; do
  echo $pin > /sys/class/gpio/export
  echo "out" > /sys/class/gpio/gpio${pin}/direction
  sleep 0.1
done

while true; do
  for pin in "${pins[@]}"; do
    echo "1" > /sys/class/gpio/gpio${pin}/value #LED on
  done
  sleep 1 # sleep 1 sec
  for pin in "${pins[@]}"; do
    echo "0" > /sys/class/gpio/gpio${pin}/value #LED on
  done
  sleep 1 # sleep 1 sec
done