Keyboard emulator

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I need to create a keyboard emulator for an external device. For example. I connect another computer to my computer with USB and another computer sees my computer as a keyboard. As I understand it, I need to write a driver that will show my computer as external keyboard. Where to begin. And that I can read about this?

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gbg On

You need to create some hardware + software. There are microcontroller demo boards for STM32 MCU, which contains a keyboard emulator firmware in their SDK. So, you should start to play with this demo board.