MUST Inverter not talking to me?

Hi, I’m very new at this: Ubuntu for about a year, this is my first time using straight Debian (12). I’m trying to set up a modest server on a Nuc D54250WYK, primarily to provide solar forecast & monitoring for a MUST PV1800. Nothing fancy, just to not have to go outdoors to look at the plant panel.
I have already on the Nuc a Pi-hole & a small Jellyfin instance, both bare metal.

So I got HA running via Podman, using the linuxserver.io image, & added HACS & the Must inverter integration by mukaschultze GitHub - mukaschultze/ha-must-inverter: Must Inverter plugin for HomeAssistant, & the logs say:

2025-01-30 22:11:32.126 WARNING (MainThread) [pymodbus.logging] Failed to connect [Errno 2] could not open port /dev/ttyUSB0:0: [Errno 2] No such file or directory: ‘/dev/ttyUSB0:0’
2025-01-30 22:11:32.126 WARNING (MainThread) [custom_components.must_inverter] not able to connect to /dev/ttyUSB0:0:0

The connection is via a usb-A port on the NUC to the usb-B port on the inverter.

I feel like I’ve read half the internet, I’ve been wrestling this thing since before the holidays

Any help would be most appreciated

Hi, welcome to the forum!

Is there any reason why you went for such a ‘non-standard/non-supported/exotic’ setup?
This really makes things more difficult and obviously not easy to find solutions.

Have you thought about installing HA bare metal?

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HA is not seeing your USB adapter at ttyUSB0. I don’t use either Debian or Podman so I don’t know how you do that. You need to present the adapter to HA.

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FYI: this is a good post about installing HAOS bare metal Installing HAOS on a dedicated x86-64 PC - #11 by MichaelSidenius

Another option, if you want to use virtualization could be Proxmox and done very easy with Proxmox VE Helper-Scripts

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Hi, thankyou

not a justification, but an explanation how I ended up with this weird setup: the only hardware I have for the task is the abovementioned NUC or a Raspberry Pi 1b. I started with the Pi-hole, installing Debian to serve that, then tried & failed to get the (windows) official MUST software to talk to the inverter. I got it to run via Play on Linux, but it just sits there “searching”. It was in the internet trawl to try & fix that, that I found mukaschultze’s integration. Out of the choices on the HA website, I chose docker but used Podman for being lighter & something I’d already used a little.

TLDR: blundered into it backwards lol

Thankyou for the post link, I wasn’t aware one could do bare metal on a NUC & I may yet resort to that, if I can find somewhere to put the pihole & jellyfin.

I think that’s pretty much a solution but if you don’t mind I’ll leave this post up a couple more days just in case some solarpunk with exotic taste in containers happens by; I’ll be back to mark it properly

Thankyou for your kind attention

Hi, yeah, I think it’s something you do with udev, I needed to check I wasn’t missing something really obvious & easy before I either start again per Nick or commit another several evenings to figuring out how to do that

Thankyou for your kind attention too :slight_smile:

Hi, did you go for bare metal HAOS?