Is it possible to emulate HID and IO via serial on teensy?

Question

Arduino

Actually, there is a task to create a HID device (based on teensy), namely a smart keyboard that will be controlled from the computer to which it is connected.
That is, it (the device) will send button presses, and which buttons and when to send them is decided by the same PC to which the device is connected.
I would like to send commands for sending keys via usb Serial, since I don’t want to fence an additional HW-serial.
Therefore, the question arose, is it even possible to receive and transmit data via usb-serial plus keystrokes (Keyboard.print()) in HID-Device mode?

Answer 1

Study the question - "composite USB device".