connect_my_rpi.sh

#!/bin/sh

# This scipt was created to simplify connecting to my Rasberry Pi 4
# via ssh. Be sure to set the MAC addresses and username accordingly!

DEVICES=$(arp -an)

parse_ip() {
    RPI_ADDRESS=$(echo $DEVICES | grep $1 | \
    awk -F '(' '{print $2}' | awk -F ')' '{print $1}')
}

# try ethernet address
parse_ip "e4:5f:1:xx:xx:xx"

if [ -z "$RPI_ADDRESS" ] 
then
    # try wifi address 
    parse_ip "e4:5f:1:xx:xx:xx"
    
    if [ -z "$RPI_ADDRESS" ] 
    then
        echo "Raspberry not found on this network!" >&2
        exit 1 
    fi
fi

# We got raspberry address!
ssh "pi@$RPI_ADDRESS"