Objective Development Forums

Hello, I try to use my Arduino Nano as virtual keyboard. I proceeded according this tutorial https://blog.petrockblock.com/2012/05/19/usb-keyboard-with-arduino-and-v-usb-library-an-example/ and use this library https://code.google.com/archive/p/vusb-for-arduino/downloads to make example compilable I added some consts before char variables. After that code compile and if I connect USB to computer it's visible like keyboard, but it doesn't write anything, even thou I remove part with button and let it write Hello word every few seconds (using millis).

Could anybody help me please, it's really important for me, it's part of my school project.