Skip to main content

Getting Started with Seeed Studio XIAO MG24


Getting Started with Seeed Studio XIAO MG24(Sense)

Seeed Studio XIAO MG24Seeed Studio XIAO MG24 Sense
Get One Now 🖱️
Get One Now 🖱️

Introduction​

Seeed Studio XIAO MG24 is a mini development board based on Silicon Labs' MG24. XIAO MG24 is based on ARM Cortex-M33 core, 32-bit RISC architecture with a maximum clock speed of 78MHz, supporting DSP instructions and FPU floating-point operations, possessing powerful computing power, and built-in AL/ML hardware accelerator MVP, which can efficiently process AI/machine learning algorithms. Secondly, it has excellent RF performance, with a transmission power of up to+19.5 dBm and a reception sensitivity as low as -105.4 dBm. It supports multiple IoT and wireless transmission protocols such as Matter, Thread, Zigbee, Bluetooth LE 5.3,Bluetooth mesh etc.

Specification​

ItemSeeed Studio XIAO MG24Seeed Studio XIAO MG24 Sense
ProcessorSilicon Labs EFR32MG24
ARM Cortex-M33 @ 78MHz
WirelessComplete 2.4GHz Wi-Fi subsystem
BLE: Bluetooth 5.3, Bluetooth mesh
Built-in Sensors - 6-Axis IMU(LSM6DS3TR-C)
Analog Microphone(MSM381ACT001)
Memory256kB RAM & 1538KB + 4MB Flash256kB RAM & 1538KB + 4MB Flash
Interface2x UART, 2x IIC, 2x SPI, 18x Analog, 18x Digital, ALL PWM, 1x User LED, 1x Charge LED
1x Reset button, 		2x UART, 2x IIC, 2x SPI, 18x Analog, 18x Digital, ALL PWM, 1x User LED, 1x Charge LED
1x Reset button,
Dimensions21 x 17.8mm21 x 17.8mm
PowerInput voltage (Type-C): 5V@14mA
Input voltage (BAT): 3.7V@7mA
Charging battery current: 200mACharging battery current: 200mA
Low Power Consumption ModelNormal: 3.7V/6.71 mA
Sleep Model: 3.7V/1.91mA
Deep Sleep Model: 3.7V/1.95μA		Normal: 3.7V/6.71 mA
Sleep Model: 3.7V/1.91mA
Deep Sleep Model: 3.7V/1.95μA
Working Temperature-20°C ~ 70°C

Features​

  • Powerful CPU:ARM Cortex-M33 core, with a maximum clock speed of 78MHz, supporting DSP instructions and FPU floating-point operations, 32-bit RISC architecture.
  • Ultra-Low Power:RX current 4.6mA/TX current 5mA (0dBm), multiple low-power sleep modes
  • Powerful AI:Built in AI/ML hardware accelerator MVP, capable of efficiently processing AI/machine learning algorithms.
  • Multi style wireless transmission:Integrated 2.4GHz multi protocol wireless transceiver, supporting multiple IoT protocols such as Matter, OpenThread, Zigbee, Bluetooth LE 5.3, Bluetooth mesh, etc.
  • Better RF Performance:Excellent RF performance, with a transmission power of up to+19.5 dBm and a reception sensitivity as low as -105.4 dBm (250kbps DSSS)
  • Powerful security:Powerful security features of Secure Vault, including secure boot, encryption, random number generation, tamper proof, secure debugging, etc.
  • Ultra-small size:
  • Rich on-chip resources:Maximum 1536KB Flash and 256KB RAM, with ample storage space.
  • Rich interfaces:Integrated with 12 bit 1Msps ADC, temperature sensor, analog comparator, DCDC and other rich peripherals, and up to 22 Pin, 2 USART, 2 low-power UART, 2 I2C and other interfaces

Hardware overview​

XIAO MG24 Sense indication diagram
XIAO MG24 indication diagram
XIAO MG24/ XIAO MG24(Sense) Pin List
tip

The difference between the two development boards is that MG24 Sense has a microphone sensor and a six axis acceleration sensor, while MG24 does not have one.

  • 5V - This is 5v out from the USB port. You can also use this as a voltage input but you must have some sort of diode (schottky, signal, power) between your external power source and this pin with anode to battery, cathode to 5V pin.
  • 3V3 - This is the regulated output from the onboard regulator.
  • GND - Power/data/signal ground

Getting started​

To enable you to get started with the XIAO MG24 faster, please read the hardware and software preparation below to prepare the XIAO.

Factory procedure​

We pre-program each new XIAO MG24 and XIAO MG24 Sense with a simple factory program.

  1. XIAO MG24

The factory program preset in the regular version is Blink Light. When you power up the XIAO,the orange user indicator will light up.

  1. XIAO MG24 Sense

The factory program preset in the regular version is The louder you shout, the brighter the light will be.

Hardware Preparation​

You need to prepare the following:

tip

Some USB cables can only supply power and cannot transfer data. If you don't have a USB cable or don't know if your USB cable can transmit data, you can check Seeed USB Type-C support USB 3.1.

Software Preparation​

The recommended programming tool for the XIAO MG24 is the Arduino IDE, so you need to complete the Arduino installation as part of the software preparation.

tip

If this is your first time using Arduino, we highly recommend you to refer to Getting Started with Arduino.

  • Step 1. Download and Install the stable version of Arduino IDE according to your operating system.
Download Arduino IDE

  • Step 2. Launch the Arduino application.
  • Step 3. Add the XIAO MG24 on-board package to the Arduino IDE and click OK.
  • Step 4. Close the Arduino IDE and reopen it.

Add the XIAO MG24 Board​

To install the XIAO MG24 board, follow these steps:

https://siliconlabs.github.io/arduino/package_arduinosilabs_index.json
  1. Add the above board manager URL to the preferences of your Arduino IDE.
  1. Download the XIAO MG24 board package.
tip

If you cannot find it after entering, please reopen the Arduino IDE.

  1. Opt for XIAO_MG24 variant.

Now enjoy coding ✨.

  • Step 1. Launch the Arduino application.

  • Step 2. Navigate to File > Examples > 01.Basics > Blink, open the program.

  • Step 3. Select the board model to XIAO MG24, and select the correct port number to upload the program.

Once the program is successfully uploaded, you will see the following output message and you can observe that the orange LED on the right side of the XIAO MG24 is blinking.

MG24 BLink CodeLED BLink DisPlay

Battery Usage​

The XIAO MG24 is capable of using a 3.7V lithium battery as the power supply input. You can refer to the following diagram for the wiring method.

pir
caution

Please be careful not to short-circuit the positive and negative terminals and burn the battery and equipment when soldering.

Instructions on the use of batteries:

  1. Please use qualified batteries that meet the specifications.
  2. XIAO can be connected to your computer device via data cable while using the battery, rest assured that XIAO has a built-in circuit protection chip, which is safe.
  3. The XIAO MG24 will not have any LED on when it is battery powered (unless you have written a specific program), please do not judge whether the XIAO MG24 is working or not by the condition of the LED, please judge it reasonably by your program.
  4. Sorry, we currently have no way to help you check the remaining battery level through software (because there are no more chip pins available), you need to charge the battery regularly or use a multimeter to check the battery level.

Test voltage​

Software code​

/*
  AnalogReadSerial

  Reads an analog input on pin 0, prints the result to the Serial Monitor.
  Graphical representation is available using Serial Plotter (Tools > Serial Plotter menu).
  Attach the center pin of a potentiometer to pin A0, and the outside pins to +5V and ground.

  This example code is in the public domain.

  https://www.arduino.cc/en/Tutorial/BuiltInExamples/AnalogReadSerial
*/

// the setup routine runs once when you press reset:
void setup() {
  Serial.begin(115200);
  pinMode(PD3, OUTPUT);
  digitalWrite(PD3, HIGH);
}

void loop() {
  int voltageValue = analogRead(PD4);
  float voltage = voltageValue * (5.0 / 4095.0);
  
  Serial.print("Voltage: ");
  Serial.print(voltage, 2);
  Serial.println(" V");
  delay(1000);  // delay in between reads for stability
}

Display Result​

pir

Deep Sleep and Sleep Example​

Demo1 : Sleep Mode and wake-up​


/*
   ArduinoLowPower timed sleep example

   The example shows the basic usage of the Arduino Low Power library by putting the device to sleep for a period of time.
   The device will enter sleep mode for 2000ms. During sleep the CPU is stopped but the RAM retains its contents.

   This example is compatible with all Silicon Labs Arduino boards.

   Author: Tamas Jozsi (Silicon Labs)
 */

#include "ArduinoLowPower.h"

void setup()
{
  Serial.begin(115200);
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, LED_BUILTIN_INACTIVE);
  Serial.println("Sleep with timed wakeup");
}

void loop()
{
  digitalWrite(LED_BUILTIN, LED_BUILTIN_ACTIVE);
  delay(500);
  digitalWrite(LED_BUILTIN, LED_BUILTIN_INACTIVE);
  delay(500);

  Serial.printf("Going to sleep at %lu\n", millis());
  LowPower.sleep(2000);
  Serial.printf("Woke up at %lu\n", millis());
}

Demo2 : Deep Sleep Mode and wake-up​

/*
   ArduinoLowPower deep sleep example with external or timed wakeup

   The example shows the basic usage of the Arduino Low Power library by putting the device into deep sleep.
   The device will remain in deep sleep until the sleep timer expires.
   During deep sleep the whole device is powered down except for a minimal set of peripherals (like the Back-up RAM and RTC).
   This means that the CPU is stopped and the RAM contents are lost - the device will start from the beginning of the sketch after waking up.

   This example is compatible with all Silicon Labs Arduino boards.

   Author: Tamas Jozsi (Silicon Labs)
 */

#include "ArduinoLowPower.h"

void setup()
{
  Serial.begin(115200);
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, LED_BUILTIN_INACTIVE);
  Serial.println("Deep sleep timed wakeup");
}

void loop()
{
  digitalWrite(LED_BUILTIN, LED_BUILTIN_ACTIVE);
  delay(500);
  digitalWrite(LED_BUILTIN, LED_BUILTIN_INACTIVE);
  delay(500);

  Serial.printf("Going to deep sleep for 10s at %lu\n", millis());
  LowPower.deepSleep(10000);
}



Demo3 : Deep Sleep Mode with flash and wake-up​

tip

If you want to set flash to deep sleep, you need to enable the 0xb9 register

/*
   ArduinoLowPower deep sleep example with external or timed wakeup

   The example shows the basic usage of the Arduino Low Power library by putting the device into deep sleep.
   The device will remain in deep sleep until the sleep timer expires.
   During deep sleep the whole device is powered down except for a minimal set of peripherals (like the Back-up RAM and RTC).
   This means that the CPU is stopped and the RAM contents are lost - the device will start from the beginning of the sketch after waking up.

   This example is compatible with all Silicon Labs Arduino boards.

   Author: Tamas Jozsi (Silicon Labs)
 */
#include <Arduino.h>
#include "ArduinoLowPower.h"

#define CS_PIN PA6
#define CLK_PIN PA3
#define MOSI_PIN PA5
#define MISO_PIN PA4

#define READ_DATA 0x03
#define WRITE_ENABLE 0x06
#define PAGE_PROGRAM 0x02
#define SECTOR_ERASE 0x20

void sendSPI(byte data) {
  for (int i = 0; i < 8; i++) {
    digitalWrite(MOSI_PIN, data & 0x80);
    data <<= 1;
    digitalWrite(CLK_PIN, HIGH);
    delayMicroseconds(1);
    digitalWrite(CLK_PIN, LOW);
    delayMicroseconds(1);
  }
}

void writeEnable() {
  digitalWrite(CS_PIN, LOW);
  sendSPI(WRITE_ENABLE);
  digitalWrite(CS_PIN, HIGH);
}

void setup()
{
  //Serial.begin(115200);
  pinMode(PA7, OUTPUT);
  digitalWrite(PA7, LOW);

  pinMode(CS_PIN, OUTPUT);
  pinMode(CLK_PIN, OUTPUT);
  pinMode(MOSI_PIN, OUTPUT);
  pinMode(MISO_PIN, INPUT);


  //SW
  pinMode(PD3, OUTPUT);
  pinMode(PB5, OUTPUT);
  pinMode(PB1, OUTPUT);
  pinMode(PB0, OUTPUT);
  pinMode(PA6, OUTPUT);
  digitalWrite(PD3, LOW); //VBAT
  digitalWrite(PB5, LOW); //RF_SW
  digitalWrite(PB1, LOW); //IMU
  digitalWrite(PB0, LOW); //MIC
  digitalWrite(PA6, HIGH);  //FLASH

  //Serial.println("Deep sleep timed wakeup");
  writeEnable();
  digitalWrite(CS_PIN, LOW);
  sendSPI(0xB9);
  digitalWrite(CS_PIN, HIGH);
}

void loop()
{
  delay(12000);  
  digitalWrite(PA7, HIGH);
  delay(500);

  //Serial.printf("Going to deep sleep for 10s at %lu\n", millis());
  LowPower.deepSleep(600000);
}

Resources​

For Seeed Studio XIAO MG24 Sense​

For Seeed Studio XIAO MG24​

Tech Support & Product Discussion​

Thank you for choosing our products! We are here to provide you with different support to ensure that your experience with our products is as smooth as possible. We offer several communication channels to cater to different preferences and needs.

Loading Comments...