HID https://stackoverflow.com/a/48258559 https://stackoverflow.com/a/47455568 https://github.com/diabolo38/HidKbd.git https://community.st.com/t5/stm32-mcus-embedded-software/usb-hid-performance-optimization/m-p/237601/highlight/true#M15642 https://gist.github.com/MightyPork/6da26e382a7ad91b5496ee55fdc73db2 https://jkorpela.fi/chars/c0.html