Raspberry Pi

host_ping.sh

#!/bin/bash
# sends ip to all devices in local network
PORT=3001
C_IP=$(ifconfig wlan0 | grep -oe 'addr:192.168.[[:digit:]]*' | cut -d. -f 3 )
COMPS=$(nmap 192.168.$C_IP.1/24 | grep "scan report" | grep -v raspberrypi | grep -oe '(192.168.[[:digit:]]*.[[:digit:]]*' | cut -d. -f4 )

for i in ${COMPS[@]}
do
	echo "ip of pi is $(hostname -I)" | netcat "192.168.$C_IP.$i" "$PORT"
done

pisip.sh

#!/bin/bash
# Run it first
PORT=3001
MY_IP=$(ifconfig -a | grep -oe '192.168.[[:digit:]]*.[[:digit:]]*' | head -n 1 )
ncat -l "$MY_IP" "$PORT"
ncat -l "$MY_IP" "$PORT"