#!/bin/bash

awkGrab=""

if [ -z "$1" ]
then
      awkGrab="all"
else
      awkGrab="$1"
fi

arpScanResult="$(sudo arp-scan --local | grep 'Raspberry')"

case "$awkGrab" in
  "ip")
    echo "$arpScanResult" | awk '{ print $1 }'
    ;;

  "mac")
    echo "$arpScanResult" | awk '{ print $2 }'
    ;;

  *)
    echo "$arpScanResult"
    ;;
esac