Seeed Studio XIAO nRF52840 - Soldered

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. Solder-Free for Instant Creation This version comes with headers already soldered on, so there's no soldering iron required. Just unbox it and plug straight into a breadboard, ideal for rapid prototyping, workshops, and beginner-friendly builds. Wireless Connectivity and Low Power Design The board includes Bluetooth Low Energy 5.4 with an onboard antenna, along with NFC connectivity. 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 VIN, 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 to solder your own headers? Grab the unsoldered XIAO nRF52840 instead. Need onboard sensors for machine learning projects? Check out the XIAO nRF52840 Sense (Soldered).