Feature

Note:

We are introducing a new more durable packaging for all Seeed Studio XIAO boards (Un-Soldered, Pre-Soldered and Plus). During the transition period , you may receive XIAO boards in either the current or new packaging, while the product quality remains identical. Thanks for your understanding.

Inspired by the unique SMD pins design of the RICK TNY, we're now introducing the Seeed Studio XIAO Plus boards (available in XIAO nRF52840 Plus, XIAO nRF52840 Sense Plus, and XIAO ESP32S3 Plus) to include an updated design of more castellations and a new pad layout on the back.

Seeed Studio XIAO nRF52840 Sense Plus, powered by Nordic chipset with FPU, brings more SMD pins to this tiny Bluetooth senor dev board. While maintaining all the capabilities of the standard version including onboard IMU and PDM microphone, Bluetooth 5.0, NFC, and low power consumption, this Plus variant features redesigned castellations and pad layout on the back, offering 9 additional GPIOs specifically for advanced Bluetooth projects requiring expanded I/Os via SMD board-to-board soldering. With native TensorFlow Lite, it's your ideal development platform for advanced embedded Machine Learning and AIoT projects.

• High-Performance MCU: Nordic Semiconductor‘s nRF52840 chip with FPU at 64 MHz, multiple development ports, compatible with Arduino/CircuitPython/MicroPython
• Onboard Sensing: Integrated 6-axis IMU and PDM microphone enable motion sensing and audio input, ideal for wearable devices and compact ML applications
• Advanced Wireless Connectivity: Bluetooth 5.0 with built-in antenna and NFC support
• Efficient Power Management: 5 μA deep sleep consumption with integrated Li-ion battery charging
• Expanded 20 GPIOs: 9 extra 1.27mm pitch SMD castellation pins beyond standard XIAO nRF52840
• Universal Compatibility: Standard backside layout (with aligned battery pads, and debugger pads) for more to-be-released XIAO expansion boards
• Classic XIAO Form Factor: 21 x 17.8mm design with 2.54mm pin headers, single-sided mounting for wearables and space-constrained projects
• XIAO Accessory Add-ons Compatibility: Natively compatible with all the XIAO accessory add-ons of expansion, connectivity modules (LoRa, CAN_Bus, RS-485), sensors (2-Mic Array, Vision AI, mmWave Motion, Environmental sensing), and actuators (ePaper display, LED Matrix, relay and more).
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Production-Ready Design with Fusion PCBA Support

As a new addition to the Seeed Studio XIAO family, the XIAO nRF52840 Plus remains the classic XIAO design (thumb-size, SMD, stamp holes). All these features make it a perfect fit for either space-limited applications, or a production-ready System on Module (SoM) for your PCBA designs.  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.

Note

XIAO SoM User Manual open-sources all hardware and software materials of XIAO, providing professional product design guidelines to help you accelerate ideas off the ground, streamline product design, providing a seamless experience from module selection to mass production. You can check here to see more info. 

Specification

Hardware Overview

• Onboard
  
  
• PinOut
  
  
  
• XIAO nRF52840 back vs XIAO nRF52840 Plus back
  

Application

• Small and flexible wearable device
• Wifi/Bluetooth controlled wireless connection project
• Embedded Machine Learning Project
• IoT and TinyML AI applications
• Mini Arduino projects

Documents

• Getting Started with Seeed Studio XIAO nRF52840 Series | Seeed Studio Wiki
• Schematic

• PCN-XIAO Series Packaging Upgrade.pdf

ECCN/HTS

Part List

Please note Seeed Studio XIAO Plus doesn‘t come with 7-pin headers as it's designed for SMD board-to-board soldering. If you'd love to have the 7-pin headers, make sure to add them to the cart.