Klipper Gcode Buttons Guide

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Klipper config:
github.com/KevinOConnor/klipper/blob/master/config/example-extras.cfg#L1385
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[@AlexTacescu]

The likely reason why you randomly get button clicks on Raspberry Pi is that you have a floating ground scenario. Consider adding a pull-up or pull-down resistor to make it reliable

[@lmamakos]

Blue pill boards are really cheap and seem like great GPIO "expanders" to get more I/O pins available for stuff like this. Thanks for the reminder!

[@sanketss84]

also what other things can be hooked to this STM32 blue pill board , like sensors, neopixel and stuff ? for klipper access

[@sanketss84]

how did you wire the button did the other pin connect to GND or 5V or 3.3V ??

[@Dendrowen]

Useful video. At 1:15 you say that you can't connect them to you pi GPIO pins cause of random triggering. Did you use pull-up resistors on those pins? Otherwise they would be floating while the button isn't pressed and that causes them to trigger sometimes.

[@IsiksTech]

I didn't. Manually checking the pins always showed the correct state so I didn't bother. I had the same issue on an another pi on another printer too, and in both cases it was Klipper reading the pins wrong. I think the problem is with the kernel, Linux kernel isn't great with real time gpio. It probably responds late to klippers polls and klipper thinks it is triggered.

[@csdstudio78]

@@IsiksTech GPIO pulls are all enabled by default unless otherwise later-disabled by the OS or Klipper during pin assignments. In reality though, we need access to system interrupts to reliably handle momentary input signals. Great work!

[@carlos_eduardo_RJ]

Hi ! Great video, congrats. But, if you use this kind of macros in your V0, could you know and suggest a STLs files to install physical buttons in the V0 skirt ?

[@IsiksTech]

I have something like that on VoronUsers on Github but it's for earlier v0 versions. You might be able to use that still. I don't know any v0.2 mods like that.

[@ChristianDybdahlXTR]

Do you need the maple mini MCU if you have octopus board with enough pins ready for use?

[@IsiksTech]

Nope. If you have enough pins you can use the Octopus.

[@system3rd]

Could you please show how did you connect button?

[@IsiksTech]

It depends on your board. Look at it's pinouts. Use a gnd and either spare endstops or gpios.

[@system3rd]

Thanks for reply~! I just want to see your hardware button. Anyhow Im super newbie of 3d printer and klipper thanks for your video. It is really hard to find klipper information and your video is really helpful!! Please keep upload klipper ~

[@IsiksTech]

The buttons can be seen here: github.com/xbst/VoronUsers/tree/master/printer_mods/xbst_/V2.4_Skirt_Buttons Thanks for your support I will make more Klipper videos for sure.

[@thirddimensionprintersllp6514]

Has anybody found how to use Raspberry Pi gpio pins gcode button in klipper