PS2Keyboard wrong output

[ripper121]

When I press the same button on the keyboard, sometimes another letter will appear on the Serial Output.

I have connected the Keyboard directly to the ESP Pins 34,35 and to VIN (5V) and GND.
Do I need some Levelshifter or will this not help?

[forlotto]

I believe keyboard support is not available in version 3 this is why you have the issue you need to use the version 2 or legacy branch if I am not mistaken support was removed to make room for other upgrades seeing how it was not used by most people.