Introduction
This manual provides essential information for the proper use and operation of your DORHEA ESP32 38Pin Development Board, model NodeMCU-32S. Please read this manual thoroughly before using the device to ensure optimal performance and safety.
Product Overview
The DORHEA ESP32 38Pin Development Board is a versatile 2.4GHz dual-mode microcontroller designed for a wide range of applications. It features a dual-core ESP-32 processor and a 38-pin configuration, offering enhanced functionality compared to 30-pin modules. Its compact size allows for easy integration into various projects.
Key features include ultra-low power consumption, compatibility with the Arduino IDE, and support for Lua programming, LWIP protocol, and FreeRTOS. The board operates in three modes: AP, STA, and AP + STA. The ESP32's design prioritizes safety, reliability, and scalability, allowing for advanced power management such as using a low-power coprocessor to monitor peripherals while the main CPU is powered down.
Figure 1: Overall view of the DORHEA ESP32 38Pin Development Board.
Setup
- Software Installation: Ensure you have the Arduino IDE installed on your computer. For ESP32 development, you will need to add the ESP32 board support package to your Arduino IDE. Refer to the official Espressif documentation or common online tutorials for detailed installation steps.
- Driver Installation: The board uses a CP2102 USB-to-UART bridge. Install the appropriate CP2102 drivers for your operating system if they are not automatically detected.
- Connecting the Board: Connect the ESP32 development board to your computer using a micro USB cable. The board should power on, indicated by an LED.
- Selecting Board and Port: In the Arduino IDE, go to Tools > Board and select the appropriate ESP32 Dev Module. Then, go to Tools > Port and select the serial port corresponding to your connected ESP32 board.
Figure 2: Micro USB port and reset/boot buttons for programming and power.
Operating Instructions
Basic Programming with Arduino IDE
- Open an Example Sketch: In the Arduino IDE, navigate to File > Examples and select an ESP32 example, such as a basic Wi-Fi scan or a blink sketch.
- Compile the Code: Click the "Verify" button (checkmark icon) to compile the sketch. This checks for syntax errors.
- Upload the Code: Click the "Upload" button (right arrow icon) to upload the compiled code to your ESP32 board. During upload, you may need to press and hold the "BOOT" button on the board, then press "RESET" (if the upload fails to start automatically), and release "BOOT" once the upload begins.
- Serial Monitor: Open the Serial Monitor (magnifying glass icon) to view output from your ESP32 board, ensuring the baud rate matches that specified in your sketch.
Wi-Fi and Bluetooth Functionality
The ESP32 supports 802.11bgn Wi-Fi and Bluetooth connectivity. You can develop applications that utilize these features for network communication, sensor data transmission, and more. Refer to the extensive ESP32 documentation and community resources for specific programming examples and libraries.
Figure 3: Detail of the ESP-WROOM-32 module, the core of the development board.
Maintenance
- Storage: Store the development board in a dry, anti-static environment when not in use to prevent damage from static discharge or moisture.
- Cleaning: If necessary, gently clean the board with a soft, dry brush or compressed air to remove dust. Avoid using liquids or abrasive materials.
- Handling: Always handle the board by its edges to minimize contact with components and prevent static damage.
- Power Supply: Ensure the power supply used is within the specified voltage range to prevent damage to the board.
Troubleshooting
- Board not detected by computer:
- - Ensure the micro USB cable is fully inserted and functional. Try a different cable.
- Verify that the CP2102 drivers are correctly installed for your operating system.
- Check if the board is powered on (LED indicator).
- Try a different USB port on your computer. - Upload fails or "Failed to connect to ESP32: Timed out waiting for packet header":
- - Make sure the correct board and serial port are selected in the Arduino IDE.
- During upload, press and hold the "BOOT" button, then press "RESET" briefly, and release "BOOT" once the upload process starts.
- Ensure no other application is using the serial port. - Wi-Fi or Bluetooth not working:
- - Double-check your code for correct Wi-Fi/Bluetooth initialization and credentials.
- Ensure the antenna is not obstructed or damaged.
- Verify that the power supply is stable and sufficient.
Specifications
| Feature | Detail |
|---|---|
| Brand | DORHEA |
| Model Name | NodeMCU-32S |
| Connectivity Technology | Wi-Fi |
| Operating System | Linux |
| CPU Manufacturer | Espressif |
| Processor Count | 2 |
| Wireless Compatibility | 802.11bgn, Bluetooth |
| Compatible Devices | Arduino devices |
| RAM Memory Technology | LPDDR |
| Total USB Ports | 1 (Micro USB) |
| Dimensions (Approx.) | 54mm x 27.8mm (2.12in x 1.09in) |
Figure 4: Approximate dimensions of the ESP32 38Pin Development Board.
Warranty Information
Warranty information for this product is not provided in the available data. Please refer to the seller's or manufacturer's website for details regarding warranty terms and conditions.
Support
For technical support or further assistance, please contact DORHEA customer service through their official channels. You may also find extensive community support and documentation for ESP32 development boards online, including forums and tutorials compatible with Arduino IDE.