XIAO nRF52840 – Tiny Arduino-Compatible Bluetooth Development Board

A compact wireless development board powered by the Nordic nRF52840. It is built for Bluetooth, wearable, sensor, and battery-powered projects. Features: Nordic nRF52840 microcontroller ARM Cortex-M4 processor with FPU Clock speed up to 64MHz Bluetooth Low Energy 5.4 Supports Bluetooth Mesh and NFC 256KB RAM 1MB internal Flash 2MB onboard Flash 11 GPIO / PWM pins 6 ADC inputs Supports I2C, SPI, UART, NFC, and SWD Built-in lithium battery charging support Standby power below 5µA Compact size: 21 × 17.8mm Supports Arduino, MicroPython, and CircuitPython Applications: Bluetooth devices Wearable electronics Wireless sensors IoT projects Battery-powered builds Robotics Arduino projects Compact prototypes