Seeed Studio XIAO

Compact and powerful microcontroller

The Seeed Studio XIAO Series is a collection of thumb-sized, powerful microcontroller units (MCUs) tailor-made for space-conscious projects requiring high performance and wireless con- connectivity. Embodying the essence of popular hardware platforms such as ESP32, RP2040, nRF52840, and SAMD21, the Arduino-compatible XIAO series is the perfect toolset for you to embrace tiny machine learning (TinyML) on the Edge.


Popular & Powerful SoCs Integrated

ESP32, RP2040, nRF52840, SAMD21, and more to come


Extra Tiny Size with SMD

Sized at 21x17.5mm with single-sided surface mount design, ready to blend in space-constrained designs



Natively compatible with Arduino, supporting MicroPython, and CircuitPython

IoT Cloud Integration

A Seamless integration with AWS, Microsoft Azure, Google Cloud and more

Seeed Studio XIAO Series

Seeed Studio XIAO ESP32C6

Excels in Matter-compliant smart home applications

Enhanced Connectivity

2.4GHz Wi-Fi 6, BLE 5.0, Zigbee, and Thread

Great RF Performance

On-board antenna and external antenna interface reserved

Security Encrypted on Chip

Secure boot, flash encryption, trusted Execution Environment, and more

Dual 32-bit RISC-V Processors

with the high-performance processor running up to 160 MHz, and the low-power processor clocking up to 20

Seeed Studio XIAO ESP32S3 Sense

Ultra-small ESP32-S3 development board with OV2640 camera, a risging star in the fields of TinyML and Smart Home


240MHz Xtensa 32-bit LX7 dual-core processor




Microphone/SD card slot/Detachable OV2640


2.4GHz WiFi and BLE 5 


Image Processing/Speech Recognition

Seeed Studio XIAO ESP32S3

Small yet extraordinary, a new Benchmark in IoT Application 


240MHz Xtensa 32-bit LX7 dual-core processor

Ultra Low-power



2.4GHz Wi-Fi and BLE 5

IoT Breakthroughs

Smart Homes/Mobile Devices/Wireless Wearable Applications

Seeed Studio XIAO SAMD21

XIAO SAMD21 is an ultra small, high performance universal development board.

Users’ Favourite:

First pioneering product of XIAO series!


The smallest Arduino-compatible board in Seeed Studio board Family

Powerful MCU (SAMD21):

ARM® Cortex®-M0+ 32bit 48MHz microcontroller(SAMD21G18) with 256KB Flash,32KB SRAM

Flexible Compatibility:

Compatible with Arduino IDE, Breadboard-friendly

Interface Rich:

11 digital/analog pins, 10 PWM Pins, 1 DAC output, 1 SWD Bonding pad interface, 1 I2C interface, 1 UART interface, 1 SPI interface

Seeed Studio XIAO RP2040

XIAO RP2040 is an ultra small, high performance universal development board. Features onboard 2MB flash, micropython support.

Getting Started Fast:

Support Arduino/Micropython/CircuitPython


Lower the barrier to entry

More Powerful MCU (RP2040):

Dual-core ARM Cortex M0+ Raspberry PI RP2040 chip, running up to 133 MHz

Rich On-chip Memory:

264KB of SRAM, 2MB of onboard Flash

Interface Rich:

11 digital pins, 4 analog pins, 11 PWM Pins, 1 I2C interface, 1 UART interface, 1 SPI interface, 1 SWD Bonding pad interface

Seeed Studio XIAO nRF52840

XIAO nRF52840 features ultra-low power BLE, suitable for wireless wearable device.

Various Wireless Connectivity Options:

Bluetooth 5.0, NFC with onboard antenna

Powerful MCU (Nordic nRF52840):

ARM® Cortex™-M4 32-bit processor with FPU operating at 64 MHz

Ultra-Low Power Consumption:

As low as 5 μA in deep sleep model

Prolonged Use Time:

Support lithium battery charge management

Interface Rich:

1x Reset button, Ix UART, 1x I2C, 1x SPI, 1x NFC, 1x SWD, 11x GPIO, 6x ADC, 1x Three-in-one LED, 1x User LED

Seeed Studio XIAO nRF52840 Sense

XIAO nRF52840 Sense features an onboard microphone and 3-axis IMU, suitable for the TinyML AI+IOT project.

Ideal Option For TinyML AI Project:

Onboard digital microphone for real-time audio recognition
6-aix IMU for gesture recognition
Sensing, Processing, Communication in 1 Node

Same Features As XIAO nRF52840

Seeed Studio XIAO ESP32C3

XIAO ESP32C3 is a low-cost, high-performance RISC-V IOT development board that supports Bluetooth&WIFI and low-power mode.

Powerful MCU (ESP32C3):

RISC-V 32bit, up to 160MHz ESP32-C3 4MB Flash

Dual-mode Wireless Connectivity:


Low Power Consumption:

WIFI (3.6mA), BLE (9.7mA), Deep Sleep Mode (44uA)

Excellent RF:

With free U.FL antenna Bluetooth/WIFI stable connection distance over 100 meters

Prolonged Use Time:

On-board charging chip design

High Cost Performance:

WIFI/BLE dual mode development board for only $4.99

Seeed Studio XIAO Series Comparison Table

Seeed Studio XIAO Series Compatible Accessories

  • Powerful AI Processor using Himax WiseEye2 HX6538 based on Arm dual-core Cortex-M55 and Ethos-U55
  • No-code AI model deployment with SenseCraft AI
  • Compatible with XIAO series, Arduino, Raspberry Pi, ESP dev board 
  • Based on FMCW principle
  • Comprehensive Human Body Detection
  • Multi-Level Intelligent Parameter Adjustment
  • Wide Detection Angle and Long Sensing Distance
  • Excellent Shell Penetration and Aesthetics Enhancement
  • Matrix 6×10 RBG extension board for Seeed Studio XIAO 
  • Support multiple splice extensions
  • Thumb-sized Compact Design
  • WS2812B LEDs
  • Compatible with QT Py for adafruit and all Seeed Studio XIAO series boards
  • Seamless XIAO Compatibility
  • Efficient Communication
  • Terminal Connection
  • Compact Design
  • ePaper display extension designed for Seeed Studio XIAO boards: Provide
  • Additional 8-pin 2.54 Header
  • Plug and Play
  • Easy & fast prototype: Easy debug and reset
  • Rich peripherals: OLED display, RTC, expandable memory space, etc.
  • No Soldering: All pin led out
  • Compact design: Only half the size of Raspberry Pi 4
  • CircuitPython compatible
  • On-board Lithium Battery Charging and Management
  • Grove compatible: Grove IIC*2, Grove UART*1, all 14 GPIO led out
  • Compact & Breakable Design
  • SPI-Flash Bonding Pad Reserved
  • Beginner friendly starter kit, compatible with all Seeed Studio XIAO series development boards
  • Careful selected grove modules for various applications
  • Complimentary Arduino introductory course
  • Exquisite 1.28″ touch screen brings your ultimate design canvas
  • Size: 1.28″ 
  • Resolution: 240×240 
  • Display Color: 65K 
  • Peripherals: RTC/TF card slot/JST 1.25 connector/Charge IC
  • Application: HMI/Wearables/Smart Home
  • Built-in Low Noise Amplifier and Surface Acoustic Wave Filter for improved sensitivity and noise reduction
  • High Precision:32/72 channels, -162dBm tracking, -160dBm re-acquisition sensitivity
  • Energy Efficiency: 41mA tracking/acquisition, 360µA standby
  • Plug-and-play modular, standardized connector prototyping system
  • 400+ modules of sensors, actuators, communication modules, shields, hats and kits
  • Compatible with popular hardware platforms of Arduino, Raspberry Pi, Micro:Bit, Particle and more

System-on-Modules  (SoM) User Manual 


XIAO SoM User Manual opensource hardware and software resources of XIAO, providing professional product design guidelines to help you accelerate your ideas off the ground. This User Manual can provide everything needed from module selection to the final manufacturing.

Why do we release XIAO SoM User Manual?

XIAO boards have enabled innovators and creators to bring their ideas to life and demenstrated the huge potential of scaling up by being utilized in various vertical applications. In 2023, we will be taking the next step in our journey by offering XIAO Series as System-on-Modules. With this new offering, Seeed is expected to be able to provide a complete service with even greater flexibility and customization options, empowering you to tailor XIAO-based solutions according to specific needs.  

Three Key Advantages of XIAO SoM Compared with Others

  • Development Board and Module Hybrid; Enabling Rapidly Prototype While Easily Integrate; Significantly Streamline Product Development Process 
  • Thriving Ecosystem Support with Powerful Software Compatibility, Rich Community Resources, and Dedicated Technical Assistance
  • One-stop service: from Module Selection to Mass Production, Seeed Has You Covered All

Seeed Studio XIAO Series Course

In addition to a detailed wiki for each product, we also have courses for Arduino beginners based on the Seeed Studio XIAO series of products, which will take you through a step-by-step project to learn programming and create fun work.


Why Seeed Studio XIAO series matters to Arduino learners?
Early Arduino development boards, such as the 8-bit, 16 MHz Arduino Uno, were very large and limited in terms of capacity and performance. Now the Seeed Studio XIAO series products, the size of a thumb cover, offers more powerful performance in a much smaller size, providing more possibilities for Arduino creation.

What you will learn

Through hands-on practice and a project-based approach, this course will take you to step by step to learn how to use Seeed Studio XIAO series products to learn Arduino from scratch, from simple lighting of LED lights to building complex Arduino wearable and miniaturized projects.
In addition, you will learn how to quickly create a usable electronic product prototype from the course.


This course does not require Arduino programming or electronics knowledge.
The course will take you to step by step to help you understand and learn necessary knowledge, and quickly practice in each project.

Seeed Studio XIAO Series Project Gallery

Since the release of our first Seeed Studio XIAO, the community has been continuously contributing projects, ranging from simple beginner-level projects, such as a desktop weather station, to advanced projects, such as a customized keyboard, and to product-level projects, such as a master control board for a 3D printer.So, how can Seeed Studio XIAO Series products spark your creativity?

You are welcome to share your projects made with XIAO series products with Seeed Studio. We will carefully select excellent projects and regularly update the promotion. For details, please refer to this page. 

Seeed Studio XIAO Series Free Prototype Project Design

To stimulate enthusiasm and help commercial customers land more productive and valuable landing projects. Seeed is sponsoring Seeed Studio XIAO series product designs with the Seeed Fusion PCBA service