Installation HA on an old PC and Install HA Core with external Modules

Installation
1

Hello Community,
I want to use HA for my house and I plan to use an old Shuttle Pc as server ( No UEFI boot and Intel Atom D525 dual core processor …).
I used Live Ubuntu linux Cd to install the OS and the HA Core.
My questions:
1.Is there a way to install node-red and Mqtt directly (or external Modules) on Linux directly and make communicate these Modules with HA . Or is there a way to install the addons on HA Core?
2.I tried to install the HA OS but with no UEFI boot I could not succeeded … ( With Echer directly on the hard disk ) .Is there a way to install HA OS on an old system without Rocket science? ( I can’t boot on a USb Stick)

thanks you
Patrick

2

No, you only get add-ons with Home Assistant OS. You can, of course, run those pieces of software manually (or in Docker).

You’d need to see if you can run Proxmox on that computer, then you could run HAOS in a VM.

If you don’t go down that route I’d highly recommend you switch to using Docker (HA Container) over Core - unless you’re happy to be manually installing Python from source (or using pyenv) every few months, then creating a new venv for HA.

3

How can a HA Core communicate with external Modules? Is there a explanation how to do it ?

4

Well, the same way as on HAOS & add-ons.

For example Node Red connects to HA’s API.

MQTT uses the MQTT integration.

etc