What UART port to use for RPi GPIO pins on an SKR v1.3 board I have a Bigtreetech SKR v1.3, and I'm trying to connect a Raspberry Pi to the board using the RPi's GPIO pins as opposed to using a USB connection because space is limited within the case of CR10S Pro.
I watched this youtube video where he explains using the Z min and Z max endstops to connect to a RPi via the GPIO pins on a Raspberry Pi, and I've watched the video several times, but havent been able to get OctoPrint to connect to the SKR v1.3 board.
There is a dedicated UART serial port on the board other than the USB port but I'm using that for the Bigtreetech tft35 v2 display so that is not an option for connecting OctoPrint to the board.
There are 5 inputs on the board for stepper drives and the TMC2208 stepper drivers that I have installed operate over UART so I'm not opposed to using the extra stepper driver port on the board to communicate with the Pi if that is an option, but figuring out how to use the Z min plus the Z max pins to connect the Pi would be ideal.
board graphic pins
If you followed the video verbatim then the pins file will be wrong, because he's changing the pins based on an MKS Gen 1.4 and not the SKR 1.3. All pins on the SKR will look similar to P2_04, which is the pin for the 2nd hotend terminal.