RPi Serial to TCPIP
From Jay's Cafe' Wiki
Equipment:
RPi 3B+
Install the latest version of raspian enabling ssh access.
Boot connected to monitor to obtain IP address.
ssh into IP.
sudo apt update
sudo apt install byobu
start a byobu session.
use raspi-config and config boot options to boot to terminal
reboot
apt update && apt full-upgrade -y
reboot
install tcpser