I want to make a device with MCU, something like Arduino or Raspberry Pi, which can connect the computer through USB cable and is programmable to send some key signals like keyboard.
Thanks!
Ask HN: Is there any way to make a MCU send a signal like keyboard? | Better HN
Yes, you can find everything you need if you search for the right thing. As you know, a keyboard is a Human Interface Device. What you want to search for then is "arduino USB HID library".