Seeed Studio XIAO nRF52840 Plus

Seeed Studio XIAO nRF52840 Plus builds on the standard XIAO nRF52840 with an updated castellation design and pad layout on the back, adding 9 extra SMD pins for boards that need more I/O. It keeps the same Nordic nRF52840 chip with FPU running at up to 64 MHz, and remains fully compatible with Arduino, CircuitPython, and MicroPython.

Expanded I/O for Advanced Builds

The Plus variant offers 20 GPIOs in total, up from 11 on the standard board, via 9 additional 1.27mm pitch SMD castellation pins. This makes it a better fit for advanced Bluetooth projects that need more digital I/O available through board-to-board soldering, while the backside layout, including aligned battery and debugger pads, stays consistent with future XIAO expansion boards.

Wireless Connectivity and Low Power Design

Bluetooth Low Energy 5.4 with a built-in antenna and NFC support carry over from the standard board, along with the same efficient power management, including 5 μA deep sleep consumption and integrated Li-ion battery charging.

Classic XIAO Form Factor

Despite the extra I/O, the board keeps the familiar 21 x 17.8mm XIAO footprint with 2.54mm pin headers and single-sided mounting, and remains natively compatible with the full range of XIAO accessory add-ons, including connectivity modules, sensors, and actuators.

Specifications

Pinout

Resources

• Seeed Studio Wiki, full setup guides, pinout diagrams, and project examples
• nRF52840 Datasheet
• Browse our full range of XIAO Expansion & Breakout Boards

Don't need the extra I/O? The standard XIAO nRF52840 covers most projects. Need onboard sensors as well? See the XIAO nRF52840 Sense Plus.

This product can be found here:

• Boards
• Development Boards
• ESP8266 & Other
• Espressif
• Wireless Development Boards