How to Use Seeed Studio XIAO MG24: Examples, Pinouts, and Specs

The Seeed Studio XIAO MG24 is a compact and powerful microcontroller board based on the ESP32 chip. It is specifically designed for Internet of Things (IoT) applications, offering built-in Wi-Fi and Bluetooth capabilities. Its small form factor and robust wireless communication features make it an excellent choice for projects requiring connectivity, such as smart home devices, wearable technology, and remote monitoring systems.

• IoT devices and smart home automation
• Wearable electronics
• Wireless sensor networks
• Remote data logging and monitoring
• Prototyping for Bluetooth and Wi-Fi-enabled projects

The following table outlines the key technical specifications of the Seeed Studio XIAO MG24:

The Seeed Studio XIAO MG24 features a total of 14 pins. The table below provides a detailed description of each pin:

1. Powering the Board: Connect the 3.3V pin to a regulated 3.3V power source and GND to ground. Alternatively, you can power the board via the USB-C connector.
2. Connecting Peripherals: Use the digital I/O pins for connecting sensors, actuators, or other peripherals. For analog sensors, connect them to the analog input pins (A0–A3).
3. Programming: The board can be programmed using the Arduino IDE or other ESP32-compatible development environments. Ensure you install the necessary board definitions and libraries.

• Voltage Levels: Ensure all connected peripherals operate at 3.3V logic levels to avoid damaging the board.
• Wi-Fi and Bluetooth: Avoid placing the board in metal enclosures or near sources of interference to maintain strong wireless connectivity.
• Heat Management: While the ESP32 chip is efficient, prolonged operation at high clock speeds may generate heat. Ensure adequate ventilation if used in enclosed spaces.

Below is an example of how to use the Seeed Studio XIAO MG24 to connect to a Wi-Fi network and send data to a server:

#include <WiFi.h> // Include the Wi-Fi library for ESP32

// Replace with your network credentials
const char* ssid = "Your_SSID";
const char* password = "Your_PASSWORD";

void setup() {
  Serial.begin(115200); // Initialize serial communication
  delay(1000);

  // Connect to Wi-Fi
  Serial.print("Connecting to Wi-Fi");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nConnected to Wi-Fi");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP()); // Print the device's IP address
}

void loop() {
  // Add your main code here
  delay(1000);
}

1. The board is not detected by the computer:

   • Ensure the USB-C cable is a data cable, not just a charging cable.
   • Check that the correct drivers are installed for the board.
   • Verify that the board is powered on and connected properly.

2. Wi-Fi connection fails:

   • Double-check the SSID and password for your network.
   • Ensure the Wi-Fi network is within range and not overloaded with devices.
   • Restart the board and try reconnecting.

3. Code upload fails:

   • Ensure the correct board and port are selected in the Arduino IDE.
   • Press the reset button on the board before uploading the code.

Q: Can I power the board using a battery?
A: Yes, the board can be powered using a 3.7V LiPo battery connected to the 3.3V and GND pins, but ensure proper regulation.

Q: Does the board support OTA (Over-The-Air) updates?
A: Yes, the ESP32 chip supports OTA updates, which can be implemented using the appropriate libraries.

Q: Can I use the board with MicroPython?
A: Yes, the Seeed Studio XIAO MG24 is compatible with MicroPython. You can flash the MicroPython firmware to the board and use it for development.