Automatic USB Password Entry with Arduino

Have you ever wished you could log into your computer with just a push of a button? With this simple Arduino project, you can turn your Arduino board into a USB password typing device that automatically enters your password when connected to a computer. It's like having a physical password key!

What Does This Project Do?

This Arduino sketch transforms your compatible Arduino board (such as Leonardo or Micro) into a USB Human Interface Device (HID) that emulates a keyboard. When plugged into a computer, it automatically types a pre-programmed password and hits the Enter key, potentially logging you into your system in seconds.

The Code

The heart of this project is a short Arduino sketch that utilizes the Keyboard library. Here's what it does:

It stores your password as a string.

When connected, it initializes the Keyboard library.

After a short delay to ensure the computer recognizes the device, it types out the password.

Finally, it simulates pressing the Enter key.

Potential Uses

Quick login to your personal computer.

Streamlined access to shared workstations.

Part of a larger DIY security system.

Security Considerations

While this project can be fun and potentially time-saving, it's crucial to consider the security implications:

Only use this on devices you own and control.

Be aware that anyone with physical access to the Arduino could potentially access your password.

This method is not recommended for high-security situations.

Customization

You can easily modify the code to:

Change the password.

Add additional keystrokes or commands.

Implement a trigger button instead of auto-typing on connection.

Conclusion

This project showcases the versatility of Arduino boards and how they can interact with computers in interesting ways. It's a great starting point for exploring USB HID projects and can be expanded into more complex systems.

Remember, with great power comes great responsibility – use this project wisely and securely!