SeeedStudio Seeed Studio XIAO SAMD21 - Arduino Microcontroller - SAMD21 Cortex M0+
Description
- SeeedStudio Seeed Studio XIAO SAMD21 - Arduino Microcontroller - SAMD21 Cortex M0+
- Offers professional-grade performance
- Suitable for complex wearables and IoT
- Facilitates rapid prototyping for beginners
- Ensures versatility with extensive ecosystem
- Supports seamless transition from prototype to production
The SeeedStudio Seeed Studio XIAO SAMD21 - Arduino Microcontroller - SAMD21 Cortex M0+ is a compact and versatile development board designed for both beginners and experienced makers in the field of open-source electronics. Built on the Microchip SAMD21G18 MCU, this microcontroller offers professional-grade performance within a miniature form factor, making it an ideal choice for projects where space is a constraint. Its compatibility with Arduino IDE, MicroPython, and PlatformIO ensures a wide range of programming options, supported by extensive learning resources and community projects.
This microcontroller serves as an excellent entry point for those new to electronics and programming, providing a comprehensive ecosystem that includes free courses, tutorials, and a variety of community-driven projects. The XIAO SAMD21 is part of a broader ecosystem that includes the XIAO Starter Kit and Grove expansion boards, which facilitate rapid prototyping without the need for prior electronics knowledge or soldering skills. This makes it particularly suitable for creating complex projects such as wearables and IoT devices.
Since its launch in 2019, the XIAO SAMD21 has set a standard for miniature development boards with its 21 x 17.8mm design. It is natively compatible with the extensive XIAO Add-on ecosystem, which includes a wide array of expansion boards, sensors, displays, and connectivity modules. This compatibility allows for versatility in project development, whether simple or complex, and supports a wide range of applications from environmental monitoring to smart home sensors.
The XIAO SAMD21 is designed for production readiness with its SMD design and standardized stamp holes, making it suitable for commercial PCBA integration. This feature streamlines the transition from prototype to production, offering a seamless path for scaling XIAO-based designs. The board's robust design and compatibility with various software platforms make it a reliable choice for rapid prototyping and embedded system development.
Note: Ensure proper handling and usage within the specified temperature range to avoid damage to the device.
- 1x SeeedStudio Seeed Studio XIAO SAMD21 - Arduino Microcontroller - SAMD21 Cortex M0+
- 7x Pin Header (2.54mm)
- 21 x 17.8 mm
- ARM Cortex-M0+ processor operating at up to 48 MHz
- 32 KB SRAM
- 256 KB Flash memory
- 14 GPIO pins
- 11 digital pins
- 11 analog pins
- 1 DAC
- 1 I2C interface
- 1 UART interface
- 1 SPI interface
- 1 user LED
- 1 power LED
- 2 status LEDs for serial communication (TX/RX indicators)
- Input voltage (Type-C): 5V
- Input voltage (BAT): 3.7V
- Compatible with Arduino, PlatformIO, MicroPython, CircuitPython, Zephyr
- Operating temperature: -40 to 85°C
While I really like the small form factor and the inexpensive price, what I didn't realize when I purchased the board was that Windows 7 is not supported. Seeedstudio do have an unsupported Windows 7 device driver available and with it my computer was able to recognize the new board in the Arduino IDE but when I tried to upload the "blink" sketch it dropped from the USB list and although I tried many things I was never able to get the board to work.
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Refund Policy
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
Please review the Return Conditions, Return Exceptions and the process on How to Request a Return Authorisation (RA) before initiating a return request.
United Kingdom consumers exercising their statutory Right of Cancellation are subject to different conditions. See the Statutory Right of Cancellation.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
- A valid Return Authorisation (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
- The RA number is valid for 30 days. The returned item must be received within that period.
- The RA number must be included with the return.
- Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
- Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RobotShop's troubleshooting process or of a verified shipping error by RobotShop.
- Refunds are processed within 7 days after receipt and inspection of the returned item.
- A £100 cleaning fee may apply to domestic robots returned in used or unclean condition.
- A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RobotShop's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
- Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
- Consumables * — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tyres, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
- Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
- Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odour-absorbing products). Not eligible for return once unsealed.
- Build-it-yourself products and items requiring customer assembly * — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
- Digital Goods, Software, and Apps * — Final sale only, due to licensing restrictions.
- Clearance Items * — Products identified as clearance or final sale, including end-of-life or discontinued items.
- Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
- On-Demand Items * — Standard catalogue products not stocked by RobotShop and ordered specifically to fulfil a customer request.
- Professional & Specialized Equipment — See the Professional & Specialized Equipment Warranty page and Professional & Institutional Buyers (B2B) section in the Terms & Conditions.
* United-Kingdom consumers retain their statutory Right of Cancellation on these items. Its exercise is subject to the conditions and exclusions set out in the Statutory Right of Cancellation, and any reimbursement may be reduced to reflect a loss in value resulting from handling beyond inspection.
How to Request a Return Authorisation (RA)
While the same return policy applies, these orders require a separate contact process for returns.
- RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
- Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".