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bigtreetech / SKR-2

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Use WIFI Plug For Additional IO #113

Open 3D-Lasers-Lab opened 2 years ago

3D-Lasers-Lab commented 2 years ago

I would like to use the custom user buttons functionality in marlin but I have no available IO left on the board. I am not using the wifi functionality at all, would it be possible to know what pins are safe to use as inputs on the wifi header and if I would need pull-up or pull-down resistors?

3D-Lasers-Lab commented 2 years ago

https://github.com/bigtreetech/SKR-2/blob/master/Hardware/BIGTREETECH%20SKR%202-SCH.pdf

Based on this diagram I am going to try and use PB11 - PB15. These appear to be wired directly to the microcontroller so I should just be able to use a pull-down resistor on my board and it should be good. I will try and report my findings.

3D-Lasers-Lab commented 2 years ago

This did work, there are some jumpers near the wifi headers to connect PB14 and PB15 to the cpu.