Marlin VS BIGTREETECH-SKR-mini-E3

I've re-installed the firmware: UBL-NoProbe-3x3-N32.bin (is this correct?) I have no probe but not sure on N32 or G32 and 3x3 or 5x5.

Firmware: Alex's Firmware 1.3.5.1 BLTouch-9x9-G32.bin

corresponding DWIN_SET in Marlin/Display firmware/Firmware Sets/

so to your last question why cant you update to marlin 2.1.x , well you can , but since its a different chip you will need an init script . if you want to do that with the 2.1.x copy this file https://github.com/alexqzd/Marlin/blob/main/Marlin/src/HAL/STM32F1/HAL.cpp into Marlin/src/HAL/STM32F1/HAL.cpp and add a #define VOXELAB_N32 into your config file , and bam it works .kinda i had some icons missing , its honestly a bit of a hassle to get working spez for someone without microprocessor experiance .

There is a limit in the firmware around 250c ish so if you want to print materials that need a higher temp you will have to modify the firmware. If that is something you want to do best to start with Alex's FW. There is a modified version here for high temps but may not be exactly the one you need. If you can't compile yourself I'm sure someone could do it for you if you make a request.

I could not find this guide to compile the firmware for it, could you link to it? It may be the pins of the CPU are wired up to different things on the aquila board and you need to define them properly. As you have the STM32 then there should not be any other changes to look out for unlike the other chips. You could compare the configuration files with Alex's to see if you have missed anything.

I would suggest using Alex's firmware if you are printing at high temps. Then you can use his repository to mod and compile you own FW. (for the H32 chip use this one) Some people have already done the high temp mod on some versions like Printsleo3D

Last week I ugraded the mainboard to a BTT SKR mini E3 v3.0, and I just used the "firmware-USB.bin" from the GitHub page to flash that board, and I updated the pin names on the printer.cfg for my printer using the example on that same GitHub page. Everything is working well, the printer in producing good parts like it did before.

I went with this following the findings in this thread https://github.com/bigtreetech/BIGTREETECH-SKR-mini-E3/issues/658

Disconnect 2 wires and hook it up to the Z-stop. Will probe, but it hovers about 25mm off the bed even when the z axis is brought all the way to 0. It will not go to negative values. Tried both the BLtouch and BLtouch-for-z-homing firmwares from here(https://github.com/bigtreetech/BIGTREETECH-SKR-mini-E3/tree/master/firmware/V3.0/Marlin) but no luck

At this point I've narrowed it down to the Klipper firmware being sent over to the Mini and after it boots. Looking at BTT's github, it is included in Klipper now. So I used the build scripts there through KIAUH. Set up the information to send it over USB and it flashes without error. I tried with Serial USART1 PA10/PA9. From the printer.cfg

at some point, I was also trying to update the firmware. I have a BL touch installed at the same time so I tried to use the V3.0 Marlin firmware (https://github.com/bigtreetech/BIGTREETECH-SKR-mini-E3/blob/master/firmware/V3.0/Marlin/firmware-ender3-bltouch.bin). I have no idea if it ever updated the firmware as there was never anything indicating it was installing. I assume I put it on a microSD, and plug it into the motherboard right?

I recently made my first upgrade on my ender-3, a Bigtreetech SKR mini e3 v3. I also bought the official Creality CR touch and installed it onto my printer. I plugged the cable into the adequate spot on the board and unplugged the cable from the Z endstop switch. I then downloaded the firmware (firmware-ender3-bltouch-for-z-homing.bin) from this page: "https://github.com/bigtreetech/BIGTREETECH-SKR-mini-E3/tree/master/firmware/V3.0/Marlin" and uploaded it to my printer.

Pre-compiled firmware. (GH)