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Seeed XIAO Expansion board

Seeed Studio

6 in stock


Seeed Studio XIAO nRF52840 Sense - TinyML/TensorFlow Lite- IMU / Microphone - Bluetooth5


6 in stock

A powerful functional expansion board for the Seeed range of Xiao boards.. It enables building prototypes and projects in an easy and quick way. With its rich peripherals including OLED, RTC, expandable memory, passive buzzer, RESET/User button, 5V servo connector, multiple data interfaces… you could explore infinite possibilities. Circuit python is also well supported by this board.

Note this board does NOT include a Seeed Xiao board. For prototyping, a Seeed Xiao board is required. Click here to see our range of Xiao products. Search our shop for available Xiao boards.

As XIAO form factor, all XIAO boards support both Grove Shield for XIAO and XIAO Expansion board. There is a slight difference between the pins and refer to the Pinout it is easy to manage.

This board can be used with any of our LiPo batteries with a JST-PH 2 pin connector.

This board can be used with any of our LiPo batteries with a JST-PH 2 pin connector. Search our shop for our range of LiPo batteries.

For details on Seeed Studio Wiki page, click here.see this page:


  • Quick Prototyping: Easy debug and Reset with RESET button and SWD pin led out to male header. 0.96”OLED, enables visual data display without PC serial monitor; Convenient plug and play Grove connectors support multiple data protocols, including IIC, Uart, Analog/Digital; No soldering needed with all pin led out.
  • Rich peripherals: OLED display, RTC, expandable memory space, passive buzzer, user button, on board battery management chip.
  • No Soldering Needed: All pin led out. Convenient plug and play Grove connectors support multiple data protocols, including IIC, Uart, Analog/Digital.
  • Circuit Python Supported: Well supports circuit python. MicroSD card slot enables memory space expand, making it possible to allocate more libraries needed in prototyping and project building.
  • Mini Size: Compact and elegant with only half Raspberry Pi 4 size, especially suitable for projects require mini size.
  • Circuit Operating Voltage: 5V / 3.7V Lithium Battery


  • Charging current 460mA (Max)
  • RTC timer precision ± 1.5S/DAY(25°C)
  • RTC battery CR1220
  • Display 0.96" OLED display
  • Expandable memory MicroSD card
  • Grove Interface Grove IIC*2, Grove UART*1, A0/D0 Grove*1
  • Other External Equipment Passive buzzer, user button, 5V servo connector

On board peripherals

  • OLED display: Visual data display without connecting to PC, which enables debug in a more efficient way, and builds application such as a sensor hub, data monitor system, etc.
  • RESET button: No more jumper wire and short circuit, easy reset with just one click.
  • SWD debug: SWD pin led out as male pin header, making debugger connection and firmware download much easier.
  • High precision RTC: High precision real-time clock with battery backup, enable maintain accurate time when the main power is turned off.
  • Expandable memory: With a MicroSD card slot on the back, no worry on memory limit any more when adding libraries and using circuit python.
  • User button: Besides the RESET button, also provide with another user-defined button.
  • Passive buzzer: Same passive buzzer on Wio Terminal, with which you could change the PMW frequency to award different beep sound to get a "buzzer music".
  • Grove connectors: All pin led out, plug and play grove connectors support common data protocols (Grove IIC*2, Grove UART*1, A0/D0 Grove*1)
  • Lipo Battery Charging: JST2.0mm standard lipo battery connector and battery management system, supports both USB and lipo battery power supply, and easy onboard battery recharge.
  • 5V servo connector: 5V output led out to male header for 5V servo and sensor connection.

Package Includes

1 x Seeed Studio XIAO Expansion Board

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Weight10 g