BIGTREETECH-TFT35-V3.0 VS BIGTREETECH-SKR-mini-E3

BigTreeTech TFT35 v3.0: I had bought this as a bundle purchase with the SKR Mini E3 V1.2. This aftermarket touchscreen really improved my experience directly on the printer at the cost of un-foreseen issues. Actually, just one issue, and I didn't know it was an issue. So I mentioned ABL issues, well, I even replaced the BLTouch too to fix them. Only then did I find out; the screen has its own firmware. That is critically important information should you ever want to get a ABL working with it. I replaced both pieces of hardware but kept the same screen before finding this out. Basically, if you wish to use an ABL you have to make sure the firmware for your board and your aftermarket screen are flashed for it. In BigTreeTech's case, they have a Github Repo for both their SKR Mini Boards and TFT screens \not the) manuals repo tho, not sure why that exists\).Prior to flashing TFT firmware it would allow me to send BLTouch commands but did not save any mesh data. After updating it, it now runs commands as expected and without issue. The touchscreen and UI are great once you get used to them. In particular, the Probe offset functionality and bed mesh grids are grade tools the touchscreen makes easy to use. I turn off all sounds though, the constant beeps drive me insane lol.

So just to put this out here so I don't feel guitly for keeping this solution for myself, I had some problems with my SKR V1.4 Turbo and I shorted out the pins for the heater on my extruder. I don't know the exact details but this resulted in my display not booting up anymore: It just went black, you could see it was on and the red LED was functioning aswell (D2) but D1 was off. After looking through some files on the github of the THT 3.5 (https://github.com/bigtreetech/BIGTREETECH-TFT35-V3.0) I came to the conclusion no one has documented this problem, so thought this'd be the right place for it. You can simply solve this issue by shorting the D1 with a 680 Ohm resistor - after this the display will boot and ask to select a mode (Marlin or "Modern"). Cheers!

Details here: https://github.com/bigtreetech/BIGTREETECH-TFT35-V3.0/issues/120

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)