I have a dongle based on nrf52840 and I want to add a display. How can I do this?
Here is my non-working version:
green - ground
yellow - vcc
blue - 020
orange - 017
(diode lights up)
For the screen, I am using this module https://github.com/englmaxi/zmk-dongle-display and I think I have configured everything as suggested.
Here is my repository with the firmware https://github.com/nik0mi/zmk-config-huhna/tree/master
Hey, I have a working dongle display using the linked repo. I wired my nRF52840 similar to the diagram here: https://zmk.dev/docs/development/hardware-integration/pinctrl, using the two pins located below the GND pins on the left side (SDA and SCL). Seems wrong in your case. Your configs look good. Here’s my working repo: https://github.com/LukasStu/bling
How can I determine which PIN to use?
I double checked your wiring. Seems correct. Sorry for the confusion. Make sure the wires are safely connected to the controller and remove the LED.
Thank you for trying to help. Unfortunately, I still haven't solved the problem, but most likely the issue is somewhere in the firmware, since everything is connected correctly.