Description:
This is the pre-soldered version of XIAO SAMD21, a mini Arduino compatible board built on Microchip SAMD21G18 MCU. As the flagship model in Seeed Studio XIAO series, this thumb-sized board offers professional-grade performance in an ultra-compact form factor with a SMD design. With comprehensive support for Arduino IDE, MicroPython, and PlatformIO, along with extensive learning courses and tutorials, it's an excellent platform for beginners entering the world of open-source electronics.
Features:
The Perfect Arduino Board for Electronics Beginners: XIAO SAMD21 (aka. Seeeduino XIAO) is your ideal gateway to electronics and programming, featuring native Arduino IDE compatibility and a complete beginner-friendly ecosystem. With comprehensive free courses, step-by-step tutorials, and extensive community projects as references, your learning journey is fully guided. The compatible XIAO Starter Kit, Grove expansion boards for XIAO, and Grove system (400+ compatible modules) enable quick prototyping without prior electronics knowledge or soldering skills. Progress naturally from basic concepts to creating complex projects like wearables and IoT devices. Whether you're new to electronics or expanding your maker skills, XIAO's combination of plug-and-play hardware and rich learning resources makes it the perfect platform to bring your creative ideas to life.
Solder-Free for Instant Creation: The pre-soldered headers mean you can start creating immediately - just unbox and plug into your breadboard. No soldering iron, no waiting, no hassle. Perfect for rapid prototyping, educational workshops, beginner-friendly projects, and time-sensitive development. Because great ideas shouldn't wait for solder to cool.
Classic Form Factor and Extensive Seeed Studio XIAO Ecosystem: First launched in 2019, XIAO SAMD21's compact 21 x 17.8mm design set the standard for miniature development boards. Its native compatibility with the comprehensive XIAO Add-on ecosystem - from expansion boards, sensors and displays to connectivity modules and actuators (Grove Expansion, CAN-Bus, LoRa module, LED Matrix, Vision AI Sensor, Round Display, L76K GSP module, 2-Mic Array, ePaper Displays, mmWave sensor, AC relay, Bus Servo Driver and many more) - makes it versatile for any project, no matter how simple or complex.
Specifications:
Product Name: Seeed Studio XIAO SAMD21
Processor: ARM Cortex-M0+ processor running at up to 48 MHz.
RAM: 32KB SRAM
Flash: 256KB Flash
Interface
GPIO Pin x14
Digital Pin x11
Analog Pin x11
DAC x1
I2C x1
UART x1
SPI x1
Onboard
User LED x1
Power LED x1
Status LEDs for Serial Communication (TX/RX Indicators) x2
Wireless Connectivity: /
Power
Input voltage (Type-C): 5V
Input voltage (BAT): 5V
Software Compatibility
Arduino, PlatformIO, MicroPython, CircuitPython, Zephyr, and more to come
Working Temperature: -40 to 85°C
Dimensions: 21x17.8mm
Hardware Overview:
Top:
Bottom:
Pinout Diagram:
Application:
-
Learning & Education (Arduino, MicroPython, basic electronics and prototyping)
-
Wearable devices (health monitoring, interactive clothing, compact fitness trackers)
-
IoT & Sensor Projects (Environmental monitoring, data collection devices, smart home sensors, small automation systems)
-
Space-Constrained Mini Arduino Projects (Miniature robots, portable devices, small electronics gadgets, embedded control systems)
-
Rapid prototyping (Quick proof-of-concept builds, hardware testing, product prototypes, embedded system development)
-
HID devices (DIY keyboard, USB to multi-channel TTL/USB host mode, etc.)
Documents:
Part List:
1x Seeed Studio XIAO SAMD21 (Pre-Soldered)
