Seeed Studio XIAO nRF52840 (XIAO BLE)

Seeed Studio XIAO nRF52840 (XIAO BLE) is a Bluetooth-enabled development board built around the Nordic nRF52840 chip, packed into the classic 21 x 17.8mm XIAO form factor. It runs an ARM Cortex-M4 with FPU at up to 64 MHz and is supported by Arduino, CircuitPython, and MicroPython, making it a solid choice for both wireless prototyping and low-power embedded projects. Wireless Connectivity and Low Power Design The board includes Bluetooth Low Energy 5.4 with an onboard antenna, along with NFC connectivity, all in a single compact module. Power design is equally considered, with deep sleep consumption as low as 5 μA and built-in lithium battery charge management, making it well suited to battery-powered and wearable applications. Thumb-Sized and Production-Ready At 21 x 17.8mm, it keeps the classic XIAO footprint, and its breadboard-friendly SMD design with no components on the back makes it easy to work with on the bench or integrate into a finished product. Specifications Processor Nordic nRF52840, ARM Cortex-M4 with FPU, up to 64 MHz Wireless Bluetooth Low Energy 5.4, Bluetooth Mesh, NFC On-chip Memory 1MB flash, 256KB RAM Onboard Memory 2MB QSPI flash Interface 1x UART, 1x I2C, 1x SPI, 1x NFC, 1x SWD, 11x GPIO (PWM), 6x ADC Dimensions 21 x 17.8mm Power 3.3V@200mA operating, 50mA/100mA charging current, 5V via Type-C, 3.7V via BAT, 5 μA standby Pinout Resources Seeed Studio Wiki, full setup guides, pinout diagrams, and project examples nRF52840 Datasheet Browse our full range of XIAO Expansion & Breakout Boards Prefer plug-and-play? Grab the pre-soldered XIAO nRF52840 instead. Need onboard sensors for machine learning projects? Check out the XIAO nRF52840 Sense.