1. Product Overview
This manual provides instructions for the Generic Pro Micro ATmega32U4 5V 16MHz Micro-USB Development Module Board. This compact microcontroller board is designed for various electronic projects and is compatible with the Arduino Leonardo platform. It offers a robust set of features for both beginners and experienced developers.
Key Features:
- ATMega 32U4 microcontroller running at 5V/16MHz
- Supported under Arduino IDE v1.0.1 and later
- On-Board micro-USB connector for programming and power
- 4 x 10-bit Analog-to-Digital Converter (ADC) pins
- 12 x Digital Input/Output (I/O) pins
2. Setup Instructions
2.1. Required Components:
- Generic Pro Micro ATmega32U4 Development Module
- Micro-USB cable for connection to a computer
- Soldering iron and solder (if pin headers are not pre-soldered)
- Computer with Arduino IDE installed
2.2. Soldering Pin Headers (if necessary):
If your Pro Micro board does not come with pre-soldered pin headers, you will need to solder them to the board. This allows for easy connection to breadboards or other components. Ensure proper ventilation and safety precautions when soldering.
2.3. Software Setup:
- Download and install the latest version of the Arduino IDE from the official Arduino website.
- Open the Arduino IDE.
- Go to Tools > Board > Boards Manager...
- Search for "Arduino AVR Boards" and install the package. This includes support for the ATmega32U4.
- Go to Tools > Board and select "Arduino Leonardo". The Pro Micro uses the same microcontroller and bootloader as the Leonardo.
- Connect the Pro Micro to your computer using a micro-USB cable.
- The computer should recognize the device and assign a COM port. Verify this under Tools > Port in the Arduino IDE.
3. Operating Instructions
3.1. Uploading a Sketch:
- Open an example sketch from File > Examples or write your own code.
- Ensure the correct board (Arduino Leonardo) and COM port are selected under the Tools menu.
- Click the "Upload" button (right arrow icon) in the Arduino IDE.
- The IDE will compile the sketch and then attempt to upload it to the Pro Micro. The RX/TX LEDs on the board will blink during the upload process.
3.2. Powering the Board:
The Pro Micro can be powered via the micro-USB connection or through the RAW pin (for unregulated input, 6-12V) or VCC pin (for regulated 5V input). Ensure the power supply matches the board's voltage requirements (5V) to prevent damage.
3.3. Using Digital I/O and Analog Pins:
The 12 digital I/O pins can be configured as inputs or outputs using the `pinMode()`, `digitalWrite()`, and `digitalRead()` functions in Arduino. The 4 ADC pins (A0-A3) can read analog sensor values using `analogRead()`.
Video 1: This video demonstrates the physical appearance of the Pro Micro ATmega32U4 board, showing both the top and bottom sides, and the included pin headers. It highlights the compact design and the micro-USB port.
Video 2: This video from SparkFun Electronics Inc. showcases the SparkFun Qwiic Pro Micro - USB-C (ATmega32U4) in a project. It details the board's features, including the ATmega32U4 microcontroller, ADC pins, PWM pins, digital I/Os, hardware serial connections, USB-C connector, Qwiic connector, reset button, and 3.3V regulator. The video also demonstrates its use in a flight controller project, highlighting its versatility for human interface devices and small builds.
4. Maintenance
The Pro Micro is a robust development board, but proper handling and care will ensure its longevity.
- Keep the board clean and free from dust and debris. Use a soft, dry brush or compressed air for cleaning.
- Avoid exposing the board to moisture or extreme temperatures.
- Handle the board by its edges to prevent static discharge damage to components.
- Regularly check solder joints for any signs of cracking or corrosion, especially if the board is subjected to physical stress.
5. Troubleshooting
5.1. Board Not Recognized by Computer:
- Ensure the micro-USB cable is fully inserted and not damaged. Try a different cable.
- Check if the correct drivers are installed. For Arduino Leonardo compatible boards, these are usually installed with the Arduino IDE.
- Verify the correct COM port is selected in the Arduino IDE.
5.2. Sketch Upload Fails:
- Confirm that "Arduino Leonardo" is selected under Tools > Board.
- Ensure the correct COM port is selected.
- If the board is unresponsive, try pressing the reset button twice quickly to put it into bootloader mode before uploading.
- Check for syntax errors in your code.
5.3. Power Issues:
- If powering externally, ensure the voltage is within the specified range (6-12V for RAW, 5V for VCC).
- Check for short circuits on your breadboard or custom circuitry.
6. Specifications
| Feature | Detail |
|---|---|
| Microcontroller | ATmega32U4 |
| Operating Voltage | 5V |
| Clock Speed | 16 MHz |
| Digital I/O Pins | 12 (of which 5 provide PWM output) |
| Analog Input Pins | 4 (10-bit ADC) |
| USB Connector | Micro-USB |
| Dimensions | Approximately 5.31 x 3.46 x 0.94 inches (Package Dimensions) |
| Weight | Approximately 0.915 ounces |
7. Warranty and Support
This product is typically covered by a standard manufacturer's warranty against defects in materials and workmanship. For specific warranty details, including duration and coverage, please refer to the documentation provided with your purchase or contact the seller directly.
For technical support, programming assistance, or troubleshooting beyond this manual, please consult online Arduino communities, forums, or the official Arduino documentation. Many resources are available to help with development projects using ATmega32U4-based boards.
