How to Use Seeed Xiao ESP32-S3: Examples, Pinouts, and Specs

The Seeed Xiao ESP32-S3 (Manufacturer Part ID: 113991114) is a compact and powerful microcontroller board designed by Seeedstudio. It is based on the ESP32-S3 chip, which features dual-core Xtensa LX7 processors, built-in Wi-Fi, and Bluetooth 5.0 LE capabilities. This board is ideal for Internet of Things (IoT) applications, wearable devices, and other projects requiring wireless connectivity in a small form factor.

With its rich set of GPIO pins, low power consumption, and support for AI acceleration, the Seeed Xiao ESP32-S3 is a versatile choice for developers and hobbyists alike. Its compatibility with popular development platforms like Arduino IDE and CircuitPython makes it accessible to users of all skill levels.

• IoT devices and smart home automation
• Wearable electronics
• Wireless data logging and monitoring
• AI and machine learning applications
• Robotics and sensor networks

1. Powering the Board:

   • Connect the board to a 5V power source using the USB-C port. The onboard voltage regulator will step down the voltage to 3.3V for the microcontroller.
   • Alternatively, you can power the board directly via the 3V3 pin with a regulated 3.3V supply.

2. Programming the Board:

   • Install the necessary drivers and libraries for the ESP32-S3 in your development environment (e.g., Arduino IDE or CircuitPython).
   • Select the correct board and port in your IDE.
   • Write your code and upload it to the board via the USB-C connection.

3. Connecting Peripherals:

   • Use the GPIO pins to connect sensors, actuators, or other peripherals. Refer to the pin configuration table for specific pin functionalities.
   • Ensure that the connected peripherals operate at 3.3V logic levels to avoid damaging the board.

Here is a simple example to blink an LED connected to pin D2:

// Define the pin where the LED is connected
const int ledPin = 2; // D2 corresponds to GPIO2

void setup() {
  // Set the LED pin as an output
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // Turn the LED on
  digitalWrite(ledPin, HIGH);
  delay(1000); // Wait for 1 second

  // Turn the LED off
  digitalWrite(ledPin, LOW);
  delay(1000); // Wait for 1 second
}

• Voltage Levels: Ensure all connected peripherals operate at 3.3V logic levels. Use level shifters if interfacing with 5V devices.
• Power Supply: Avoid exceeding the input voltage range (5V via USB-C or 3.3V via 3V3 pin) to prevent damage.
• Heat Management: While the board is efficient, prolonged high-performance tasks may cause slight heating. Ensure proper ventilation if used in enclosed spaces.
• Firmware Updates: Regularly check for firmware updates to ensure compatibility and access to the latest features.

1. The board is not detected by the computer:

   • Ensure the USB-C cable is a data cable (not just a charging cable).
   • Check if the necessary drivers for the ESP32-S3 are installed on your computer.
   • Try a different USB port or cable.

2. Code upload fails:

   • Verify that the correct board and port are selected in your IDE.
   • Press and hold the reset button while uploading the code to enter bootloader mode.

3. Wi-Fi or Bluetooth is not working:

   • Ensure the correct libraries (e.g., WiFi.h or BluetoothSerial.h) are included in your code.
   • Check that your router or Bluetooth device is within range.

4. Peripherals are not responding:

   • Double-check the wiring and connections.
   • Confirm that the peripherals are compatible with 3.3V logic levels.

Q: Can I use the Seeed Xiao ESP32-S3 with CircuitPython?
A: Yes, the board is compatible with CircuitPython. You can download the appropriate firmware from the CircuitPython website and flash it to the board.

Q: What is the maximum current output of the 3V3 pin?
A: The 3V3 pin can supply up to 500 mA, depending on the input power source.

Q: Does the board support deep sleep mode?
A: Yes, the ESP32-S3 supports deep sleep mode for ultra-low power consumption, making it ideal for battery-powered applications.

Q: Can I use this board for AI/ML applications?
A: Absolutely! The ESP32-S3 includes support for vector instructions and AI acceleration, making it suitable for lightweight AI/ML tasks.

This documentation provides a comprehensive guide to using the Seeed Xiao ESP32-S3. For further assistance, refer to the official Seeedstudio documentation or community forums.