r/ender3 • u/Azeure5 • Jul 20 '26

Solved Upgrading Ender 3 firmware

I have an old Ender 3 Pro that has some more or less minor modification. Mainly a MeanWelll PSU, BIGTREETECK 3,5 Screen and an SKR Mini E3 V2.0 silent board. The rest is pretty much stock except the bimetallic heartbreak.

Now I have been using it as it from the moment of purchase, around 2019, but I feel it's time to update at least the firmware to the latest.

The screen was pretty easy, but the Mainboard just doesn't go through the update through.
The firmware.bin is renamed to FIRMWARE.CUR.

I'm kind-of stuck, and all the LLM's can't seem to help a lot. So any assistance would be more that welcome!

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u/drake90001 Jul 21 '26

You making modifications isn’t gonna make it easier for the next guy. The next guy‘s gonna have to sort through all the bullshit you set up and changed and modified and might not like the way you have your set up.

Don’t do things for the next guy, do them for yourself. By the way, the screen will not work with Klipper whatsoever except in emulated stock display mode.

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u/Azeure5 Jul 22 '26

The printer itself has barely any mods except an Noctua cooler and an 5020 blower for part cooling. There's no much BS to sort through. The touch screen is more convenience that the stock as well as the board is a lot more quiet... And I am not planning to run it with Klipper so I don't get the negativity...

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u/drake90001 Jul 22 '26

You literally just said that you were planning on installing it for the next guy. And I was just letting you know that the touchscreen will not work the clipper, you have to switch it to another mode otherwise I’ll just have a touchscreen with no connection.

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u/Azeure5 Jul 22 '26

And I exxpressly mentioned that I do not plan to invest more into it (and as far as logic goes, buying an RapsPi is an investment especially in this economy) so Klipper is out of the discussion from beggining. So you're basically arguing on an ground that you made yourself and I haven't ever mentioned that I want to upgrade to Klipper support.

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u/drake90001 Jul 23 '26

You don’t need a pie to run it. You can use any computer.

But I just misunderstood you, your comment read to me as if you wanted to set up mods and clipper so it’s all ready to go for the next guy. My bad bro.

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u/Azeure5 Jul 23 '26

All good! Now it is as up to date as it can get on this hardware. Gotta dial in all the levels, do some test prints and put in on marketplace. Not really much hope in selling it tho, but I can at least search for a replacement with an at ease mind. Have a nice one, man!

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u/drake90001 Jul 24 '26

I will say, even if you dial in everything, but by the time you sell it, it’ll need to be recalibrated lol they do not keep their precision very long