FLY-GEMINI V3 reserved pin and refusing system packages | VORONDesign | Page 1

rain orbit Aug 12, 2025, 4:55 PM

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So I got a v0.2 kit from siboor and it came with this board, at first it gave me a bunch of problems but I re-flashed it following the docs by mellow and everything works correctly.
However I still have a couple of problems:

~~1. No matter what I can't update system packages~~ EDIT: had to comment out bullseye-backports cause I have bad timing...
2. I have a ton of pins on the board I wanna use (RGB, Filament sensor etc..) but a lot of them are 'reserved'.

Would love your input as to what I should do and how to tackle it.

tawdry niche Aug 12, 2025, 5:02 PM

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What are you trying to use pa12 for?

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I don't see it on the pinout

rain orbit Aug 12, 2025, 5:03 PM

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rn just for testing, but eventually some rgbs or a filament sensor

tawdry niche Aug 12, 2025, 5:04 PM

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But where is it.

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I might be blind

rain orbit Aug 12, 2025, 5:04 PM

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ohh I'm sorry my bad

tawdry niche Aug 12, 2025, 5:04 PM

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But I don't see it listed anywhere on that pinout

rain orbit Aug 12, 2025, 5:04 PM

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at the bottom above the 'screen' connector

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where it says 'can'

tawdry niche Aug 12, 2025, 5:05 PM

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Oh, in the can interface

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Ya, that's not gonna happen

rain orbit Aug 12, 2025, 5:06 PM

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Got ya, any other pins I can use besides those on the bl-touch interface?

tawdry niche Aug 12, 2025, 5:06 PM

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But also...what is happening here

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I pulled up a pinout from their githib

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...proports to be the same board

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But...totally different pins down there

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https://raw.githubusercontent.com/Mellow-3D/Fly-Gemini-V3/refs/heads/main/Hardware/Gemini_v3_pinout.svg

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rain orbit Aug 12, 2025, 5:07 PM

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tawdry niche https://raw.githubusercontent.com/Mellow-3D/Fly-Gemini-V3/refs/heads/main/Hardwa...

What the...

tawdry niche Aug 12, 2025, 5:07 PM

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Right?

rain orbit Aug 12, 2025, 5:07 PM

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This is crazy

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This board is driving me nuts

tawdry niche Aug 12, 2025, 5:08 PM

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But either way, the can header is gonna have can interface hardware on it, it's not just gonna be a raw port for you to use

rain orbit Aug 12, 2025, 5:08 PM

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tawdry niche

Only these two are different from what I can tell

rain orbit Aug 12, 2025, 5:09 PM

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tawdry niche But either way, the can header is gonna have can interface hardware on it, it's ...

Anything else goes?

tawdry niche Aug 12, 2025, 5:09 PM

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For just miscellaneous i/o, the "aux" headers are going to be likely your best bet

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(Exp1/2)

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Maybe that "sceeen" port? I'd have to look at a schematic for that one. I'm not quite sure what it is

rain orbit Aug 12, 2025, 5:10 PM

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tawdry niche (Exp1/2)

But some of them have stuff on them, for example PA10, excuse my ignorance please, this is not my strong suite

rain orbit Aug 12, 2025, 5:11 PM

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tawdry niche Maybe that "sceeen" port? I'd have to look at a schematic for that one. I'm no...

I used them already😬 toolhead leds and the bed led

tawdry niche Aug 12, 2025, 5:12 PM

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I see...pa9 and pa10 are duplicated between exp1 and "screen"

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That's silly

rain orbit Aug 12, 2025, 5:12 PM

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How about 'st-link' I see PA13 PA14 GND 3.3V which will be perfect for the sensor

tawdry niche Aug 12, 2025, 5:13 PM

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I mean, at some point you just run out of i/o and you have to add an expander or a dingy or something

tawdry niche Aug 12, 2025, 5:14 PM

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rain orbit How about 'st-link' I see PA13 PA14 GND 3.3V which will be perfect for the senso...

Maybe? Stlink is the port for a hardware programmer, so its pins are likely dupes as well. Pa14 is up in exp2

rain orbit Aug 12, 2025, 5:14 PM

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Yeah sure, i just figured I'll squeeze as much as I can out of this thing
Also, could I use an sb2209 as an expander?

tawdry niche Aug 12, 2025, 5:14 PM

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Not sure about pa13. Might be free

tawdry niche Aug 12, 2025, 5:15 PM

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rain orbit Yeah sure, i just figured I'll squeeze as much as I can out of this thing Also, ...

I suppose. I wouldn't buy one for that purpose. But if you already have it lying around....

rain orbit Aug 12, 2025, 5:16 PM

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I do, I should flash it as a usb device and give it a go?
Will I have to deliver power separately or will the usb be enough?

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Assuming it will only be used as pins and power will be taken from the main board

tawdry niche Aug 12, 2025, 5:17 PM

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Depends what you're using it for. If it's just doing miscellaneous i/o, usb power should be okay. But of course none of the heater or fan ports will work

rain orbit Aug 12, 2025, 5:18 PM

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worth a shot, I'll post here once I have it set up, as for the system packages, do you have any idea what I can do about it?

tawdry niche Aug 12, 2025, 5:19 PM

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I'd ssh in and run a sudo apt update manually. I'm assuming it'll still fail, but hopefully it'll give a little more useful output to figure out what's actually happening

rain orbit Aug 12, 2025, 5:22 PM

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On it

rain orbit Aug 12, 2025, 5:25 PM

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tawdry niche I'd ssh in and run a `sudo apt update` manually. I'm assuming it'll still fail,...

tawdry niche Aug 12, 2025, 5:26 PM

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Oh. Ya...that makes sense

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Bullseye is, as of a few days ago "oldstable" not "stable" (there's a new "stable ")

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And old stable doesn't get backports

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You'll need to remove that from the sources list

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sudo nano /etc/apt/sources.list

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And grab another screenshot

rain orbit Aug 12, 2025, 5:27 PM

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Okay, not sure what that means but I'm with you, tho I have this printer up I think 2 weeks-ish and it was always like that

rain orbit Aug 12, 2025, 5:27 PM

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tawdry niche And grab another screenshot

on it

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tawdry niche Aug 12, 2025, 5:28 PM

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rain orbit Okay, not sure what that means but I'm with you, tho I have this printer up I th...

Bullseye is a release of debian, which is (sorta) the Linux os on there

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Its now been replaced by trixie

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So you want to just get of that line that's talking about bullseye-backports. Third line thst isn't a comment

rain orbit Aug 12, 2025, 5:31 PM

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This line? what should I do with it

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oh sorry 2 lines below that

tawdry niche Aug 12, 2025, 5:31 PM

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Just comment it out

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(Add a # at the beginning)

rain orbit Aug 12, 2025, 5:32 PM

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just to confirm

tawdry niche Aug 12, 2025, 5:32 PM

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Yep, looks good

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Save & exit, and try sudo apt update again

rain orbit Aug 12, 2025, 5:34 PM

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Ran it, seems to be thinking a long time

tawdry niche Aug 12, 2025, 5:35 PM

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That's promising

rain orbit Aug 12, 2025, 5:51 PM

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tawdry niche That's promising

We got it! everything updated fully

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Thank you!

#FLY-GEMINI V3 reserved pin and refusing system packages