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USB HID Mouse

Overview

The USB HID Mouse sample demonstrates using the USB Human Interface Device (HID) module to implement a mouse input device that you can connect to your computer.

This sample code enumerates the nRF52840 Connect Kit into a HID mouse that has a left button connected to the USER button.

Tip

adafruit_hid is pre-built into CircuitPython as a frozen module, so that it can be imported in the code directly.

Requirements

Before you start, check that you have the required hardware and software:

Running the code

To run the code, complete the following steps:

  1. Connect nRF52840 Connect Kit to your computer using the USB-C Cable.
  2. Start Mu Editor, click Load to open code.py in the CIRCUITPY drive.

  3. Copy and paste the following code into code.py and click Save:

    CIRCUITPY/code.py
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    import time
import board
import digitalio
import usb_hid
from adafruit_hid.mouse import Mouse

mouse = Mouse(usb_hid.devices)

left_button = digitalio.DigitalInOut(board.USER)
left_button.direction = digitalio.Direction.INPUT
left_button.pull = digitalio.Pull.UP

while True:
    if left_button.value is False:
        mouse.click(Mouse.LEFT_BUTTON)
        time.sleep(0.2)  # Debounce delay

  4. Your code will run as soon as the file is done saving. The board will enumerate as a HID mouse. Press USER button on the board, and observe that a left mouse click is activated.