Remote control of PC and Smartphones with DIY HID devices (incl. Rubber Ducky / Bad USB)

Introduction

In this tutorial, we will explore how to create DIY Human Interface Device (HID) projects that allow you to control PCs and smartphones remotely. Inspired by Andreas Spiess's video, we will cover five different projects, focusing on the use of microcontrollers to replace manual input methods. This guide will provide you with step-by-step instructions to help you understand and implement these innovative projects.

Step 1: Gather Required Materials

Before starting your projects, ensure you have the following components:

• Microcontroller (e.g., Arduino Pro Micro or ESP32)
• Rubber Ducky or similar Bad USB device
• Jog Wheel (optional for specific projects)
• USB cables for connection
• Breadboard and jumper wires for prototyping
• Access to a computer and smartphone for testing

Practical Tip

Purchase components from reliable sources like AliExpress or Amazon. Check links provided in the video description for easy access.

Step 2: Set Up the Microcontroller

1. Choose your microcontroller: Depending on your project, you can use Arduino Pro Micro or ESP32.
2. Install necessary libraries:
   • For ESP32 projects, install the ESP32 BLE Keyboard Library from GitHub.
3. Connect your microcontroller to your computer via USB.

Common Pitfall

Make sure to select the correct board and port in your IDE (e.g., Arduino IDE) before uploading the code.

Step 3: Write or Upload the Code

1. Visit the GitHub repository for code snippets: HID Examples.
2. Copy the relevant code for your project. For example:

   #include <Keyboard.h>
   
   void setup() {
       Keyboard.begin();
   }
   
   void loop() {
       Keyboard.press('A'); // Sends the 'A' key press
       delay(1000);
       Keyboard.releaseAll();
   }
   

3. Upload the code to your microcontroller through your IDE.

Practical Tip

Test the code with simple keystrokes before implementing more complex commands.

Step 4: Connect the Components

1. Assemble your circuit on a breadboard if needed.
2. Connect the jog wheel or other input devices to the microcontroller. Follow the wiring diagram provided in the project documentation.
3. Ensure all connections are secure to prevent any signal loss.

Real-World Application

Using a jog wheel can enhance the user experience in creative projects, such as video editing or music production.

Step 5: Test Your HID Device

1. Connect the microcontroller to your PC or smartphone.
2. Check if the device is recognized as an HID.
3. Run a test script to confirm that inputs (like keyboard strokes) are working as intended.

Common Pitfall

If your device is not recognized, check the USB cable and ensure the drivers are correctly installed.

Conclusion

In this tutorial, we explored the steps to create DIY HID devices for remote control of PCs and smartphones. By gathering materials, setting up your microcontroller, and testing the device, you can build innovative projects that automate data input. For further exploration, consider experimenting with different input methods or integrating additional sensors to enhance functionality. Happy tinkering!