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.

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.

Production-Ready Design with Fusion PCBA Support

All Seeed Studio XIAO dev boards feature a production-optimized SMD (Surface Mount Device) design with standardized stamp holes, making it perfect for commercial PCBA (Printed Circuit Board Assembly) integration. Through our Fusion PCBA Sponsorship program, you can not only enjoy the lowest unit prices for all XIAO modules from our Fusion Open Parts Library, but also fabricate and scale your XIAO-based PCBA designs at low cost (30% off) with FREE Design for Manufacturing consulting services, streamlining your journey from prototype to production.

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• 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.)