How to set up the WaveShare Raspberry Pi PoE HAT Type (B) with display

setup-poe-hat.sh

#!/bin/bash
# 2022-01-01 Charles Godwin
#  Derived from https://www.waveshare.com/wiki/PoE_HAT_(B)
# enable i2c interface if necessary
# Read the following for details
# https://gist.github.com/CharlesGodwin/adda3532c070f6f6c735927a5d6e8555#file-waveshare-poe-hat-md
#
IS_I2C=`sudo raspi-config nonint get_i2c`
[ $IS_I2C -ne 0 ]&&sudo raspi-config nonint do_i2c 0
# install required packages
sudo apt update
sudo apt install -y python3-pip python3-pil libatlas-base-dev
sudo pip3 install RPi.GPIO smbus numpy
# cleanout artifacts if necesary
[ -d ~/PoE_HAT_B_code ] && rm -rf ~/PoE_HAT_B_code
[ -f ~/PoE_HAT_B_code.7z ] && rm -rf ~/PoE_HAT_B_code.7z
# install Waveshare libraries and examples
wget https://www.waveshare.com/w/upload/8/8b/PoE_HAT_B_code.zip
unzip -o  PoE_HAT_B_code.zip -d .
# move required parts to ~/.poe-hat directory
[ -d ~/.poe-hat ] && rm -rf ~/.poe-hat
mkdir -p ~/.poe-hat
mv PoE_HAT_B_code/python/examples/main.py ~/.poe-hat/
mv PoE_HAT_B_code/python/lib/waveshare_POE_HAT_B ~/.poe-hat/
mv PoE_HAT_B_code/python/readme_EN.txt ~/.poe-hat/PoE_HAT_B_readme.txt
# cleanup
rm PoE_HAT_B_code.zip
rm -rf PoE_HAT_B_code
rm -f $0
#
# define and enable service
#
PYTHON=`which python3 |head -n1`
cat <<EOF >poe-hat.service
[Unit]
Description=Waveshare Poe Hat B
After=network.target

[Service]
Environment=systemd=true
ExecStart=${PYTHON} ${HOME}/.poe-hat/main.py
Restart=always
RestartSec=30

[Install]
WantedBy=multi-user.target
EOF
sudo mv -f poe-hat.service /etc/systemd/system
sudo systemctl daemon-reload
sudo systemctl enable poe-hat.service --now
sudo systemctl status poe-hat.service --no-pager

waveshare-poe-hat.md

I have reviewed this git project and think it's a superior solution. Try it!

This script has been tested on Raspberry Pi OS, Buster (Legacy) and Bullseye only. This installation is simpler that the Waveshare provided instructions.

The supplied program will control the fan but for it to work you must slide the FAN switch on the HAT to the P0 position.

To use the script you can download the zip file and unzip it or, copy and paste the RAW version setup-poe-hat.sh and paste it into an editor. I reccomend you use nano setup-poe-hat.sh in a Pi terminal or ssh session.

Then run bash setup-poe-hat.sh

When finished it will delete itself and any files needed only for installation. This script can be rerun. It will do a new install of the Waveshare software.

When complete a systemd service named poe-hat.service will run and start on every boot.

to remove run these commands

sudo systemctl disable poe-hat.service
sudo systemctl stop poe-hat.service
rm -rf ~/.poe-hat

Hey guys!
I was also looking for a better alternative to the PoE HAT script. Unfortunately I did not find any alternatives that fully satisfy my needs.
So after seeing what @klamann created I got inspired and made my own version written in Rut 😃
Because it's written in Rust it has very low resource usage (I'm seeing less than 4MB memory and barely any cpu)
If you want try it out and let me know what you think!
https://github.com/jackra1n/RustBerry-PoE-Monitor

@jackra1n this looks really good! makes my implementation pretty much obsolete. Well, at least my idea for the UI lives on 😄