The steps where as follows:
Connect to you Raspi via ssh:
ssh umbrel@umbrel.local
or
ssh umbrel@ip-address-of-your-raspi
in case the hostname doesn’t work in your network. Password should be the same as for your umbrel login.
Update your OS with the following two commands:
sudo apt-get update
sudo apt-get upgrade
Install the needed Home Assistant Supervised dependencies:
sudo apt-get install network-manager apparmor-utils systemd-journal-remote udisks2 jq -y
Reboot
sudo reboot now
You will lose your ssh connection, so wait a couple seconds and reconnect to your Raspi.
Next, get the Agent for Home Assistant OS (check the github, if there is a newer version than 1.4.1):
wget https://github.com/home-assistant/os-agent/releases/download/1.4.1/os-agent_1.4.1_linux_aarch64.deb
and install it:
sudo dpkg -i os-agent_1.4.1_linux_aarch64.deb
Now you should be ready, so get the official Home Assistant Supervised installer script:
wget https://github.com/home-assistant/supervised-installer/releases/latest/download/homeassistant-supervised.deb
Install the package
sudo dpkg -i homeassistant-supervised.deb
You will see a dialog asking you to select machine type. Choose raspberry4-64
The first start of HASS supervised will take some time. After a minute or even 5 minutes (be patient here) you can open a new tab and type your device IP on port 8123 (default Home Assistant port). Example: http://umbrel.local:8123
If there’s anything broken, try:
sudo dpkg –configure -a
sudo apt –fix-broken install