Middle Lightkey button not working

So yeah. I noticed that the middle Lightkey button wasn’t working when I tried using it as the screenshot key in Retroarch. The LEDs all light up no problem, it’s just that the key does nothing.
I looked at the raw events with showkey over SSH and the key straight up does nothing, even there. All the other keys send keycodes.
How do I rebind the keys in order to get this working?

middle key is a clone of the shift key, to change it you need patch the keypad firmware

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Oh, I didn’t know the keypad actually ran arduino stuff. That’s so neat!
Thanks for clearing things up.

i could also recommend you to use the emulated mouse firmware >

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