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

The Seeed Studio XIAO MG24 Sense is a compact and versatile microcontroller board powered by the MG24 chip. It is specifically designed for Internet of Things (IoT) applications, offering built-in wireless communication capabilities such as Bluetooth Low Energy (BLE) and Zigbee. This board is ideal for sensor data collection, processing, and wireless transmission, making it a perfect choice for smart home devices, wearable technology, and industrial IoT solutions.

• Wireless sensor networks
• Smart home automation
• Wearable devices
• Environmental monitoring
• Industrial IoT systems
• Prototyping BLE/Zigbee-enabled devices

The Seeed Studio XIAO MG24 Sense is packed with features that make it a powerful yet compact microcontroller board. Below are its key technical specifications:

The XIAO MG24 Sense features a total of 14 pins, including power, digital, and analog pins. Below is the pinout description:

The Seeed Studio XIAO MG24 Sense is easy to integrate into IoT projects. Below are the steps to use it effectively:

1. Power the Board: Connect the board to a 3.3V or 5V power source via the 3V3 and GND pins.
2. Connect Sensors/Actuators: Use the digital (D0-D5) and analog (A0-A3) pins to interface with sensors, actuators, or other peripherals.
3. Wireless Communication: Utilize the BLE or Zigbee capabilities for wireless data transmission.
4. Programming: Use the Arduino IDE or Silicon Labs Simplicity Studio to program the board. The board supports Arduino libraries for BLE and Zigbee.

• Ensure the input voltage does not exceed 5V to avoid damaging the board.
• Use appropriate pull-up or pull-down resistors for digital inputs if required.
• For wireless communication, ensure the board is within the recommended range of the receiving device.
• Avoid exposing the board to temperatures outside the operating range (-40°C to +85°C).

Below is an example of how to use the XIAO MG24 Sense to read sensor data and transmit it via BLE:

#include <ArduinoBLE.h> // Include the Arduino BLE library

// Define a BLE service and characteristic
BLEService sensorService("180A"); // Custom service UUID
BLEFloatCharacteristic sensorDataChar("2A6E", BLERead | BLENotify);

void setup() {
  Serial.begin(9600); // Initialize serial communication
  while (!Serial);

  // Initialize BLE
  if (!BLE.begin()) {
    Serial.println("Failed to initialize BLE!");
    while (1);
  }

  Serial.println("BLE initialized.");

  // Set up BLE service and characteristic
  BLE.setLocalName("XIAO_MG24_Sense");
  BLE.setAdvertisedService(sensorService);
  sensorService.addCharacteristic(sensorDataChar);
  BLE.addService(sensorService);

  // Start advertising
  BLE.advertise();
  Serial.println("BLE advertising started.");
}

void loop() {
  // Simulate sensor data (e.g., temperature in Celsius)
  float sensorData = 25.0 + random(-5, 5) * 0.1;

  // Update BLE characteristic with sensor data
  sensorDataChar.writeValue(sensorData);

  // Print data to serial monitor
  Serial.print("Sensor Data: ");
  Serial.println(sensorData);

  delay(1000); // Wait 1 second before sending the next update
}

1. Board Not Detected by IDE:

   • Ensure the correct board and port are selected in the Arduino IDE.
   • Install the necessary board support package for the XIAO MG24 Sense.

2. BLE Connection Fails:

   • Verify that the receiving device supports BLE 5.3.
   • Ensure the board is within the recommended range of the receiving device.

3. Sensor Data Not Accurate:

   • Check the sensor connections and ensure proper calibration.
   • Verify that the power supply is stable and within the recommended range.

4. Overheating:

   • Ensure the board is not exposed to high ambient temperatures.
   • Avoid drawing excessive current from the 3V3 pin.

• Use a multimeter to check the voltage levels on the power pins.
• Update the firmware or bootloader if the board behaves unexpectedly.
• Refer to the official Seeed Studio documentation for advanced debugging techniques.

By following this documentation, you can effectively utilize the Seeed Studio XIAO MG24 Sense in your IoT projects.