I have an Arduino Nano v3.0 ATmega328p board. I want to make an auto keyboard that types in a string when its plugged in. I have googled and found that these chips doesn't support that feature unlike "pro micro". keyboard.h is not supported with this chips. So is there any alternative way to use it as a HID and emulate keyboard inputs using any other additional shield other than using the built in USB port. Im a noob in this field, please help. Thanks in advance.