sudo apt-get update
sudo apt-get upgrade -y
sudo apt-get install python3 python3-venv python3-pip

sudo useradd -rm homeassistant -G dialout,gpio

cd /srv
sudo mkdir homeassistant
sudo chown homeassistant:homeassistant homeassistant

sudo -u homeassistant -H -s
cd /srv/homeassistant
python3 -m venv .
source bin/activate

(homeassistant) homeassistant@raspberrypi:/srv/homeassistant $ python3 -m pip install wheel
(homeassistant) homeassistant@raspberrypi:/srv/homeassistant $pip3 install homeassistant
(homeassistant) homeassistant@raspberrypi:/srv/homeassistant $hass

sudo -u homeassistant -H -s
cd /srv/homeassistant
source bin/activate
pip3 install --upgrade homeassistant

pip install --upgrade pip

sudo nano -w /etc/systemd/system/homeassistant@homeassistant.service

[Unit]
Description=Home Assistant
After=network-online.target

[Service]
Type=simple
User=%i
ExecStart=/srv/homeassistant/bin/hass -c "/home/homeassistant/.homeassistant"

[Install]
WantedBy=multi-user.target

sudo systemctl --system daemon-reload
sudo systemctl enable homeassistant@homeassistant.service
sudo systemctl disable homeassistant@homeassistant.service

sudo systemctl start homeassistant@homeassistant.service

sudo journalctl -f -u homeassistant@homeassistant.service