python-guide

# Guide for python installation for Raspbian 11 (bulsseye)

sudo apt update
sudo apt install libc6-dev libcap2 libcap-dev 
sudo adduser $USER kmem
echo 'SUBSYSTEM=="mem", KERNEL=="mem", GROUP="kmem", MODE="0660"' | sudo tee /etc/udev/rules.d/98-mem.rules
sudo reboot
sudo apt install python3-pip
pip3 install pillow
pip3 install numpy
sudo apt install libopenjp2-7
sudo apt install libtiff5
sudo apt install libatlas-base-dev
pip3 install RPi.GPIO
pip3 install smbus
cd
sudo apt install p7zip-full
wget https://www.waveshare.com/w/upload/0/06/Fan_HAT.7z
7z x Fan_HAT.7z  -r -o./Fan_HAT
cd Fan_HAT/python/
python3 main.py

# A systemd unit
sudo vi /etc/systemd/system/pwm-led.service

# Paste the below, save and quit

[Unit]
Description=pwm-led
After=network-online.target
Wants=network-online.target

[Service]
ExecStart=/usr/bin/python3 -u main.py
WorkingDirectory=/home/pi/Fan_HAT/python/
StandardOutput=inherit
StandardError=inherit
Restart=always
User=pi

[Install]
WantedBy=multi-user.target

# At the end reload the daemon , enable and start the service

sudo systemctl daemon-reload
sudo systemctl enable pwm-led.service

#Restart Raspberry
sudo reboot