A great size board for creating wearable projects!
The XIAO RP2040 uses the Raspberry Pi RP2040 chip — the same chip as the Raspberry Pi Pico — in a tiny thumb-sized form factor (20 × 17.5 mm). Fully supports Arduino, MicroPython, and CircuitPython, so you can reuse libraries you already know.
The flat back (no components underneath) makes it breadboard-friendly and easy to mount on PCBs or stitch onto fabric carriers for e-textiles.
Features
Processor: Dual-core ARM Cortex-M0+, up to 133 MHz
Memory: 264 KB SRAM, 2 MB onboard flash
I/O: 11 digital pins, 4 analog inputs, 11 PWM channels
Interfaces: I2C, SPI, UART, SWD debug pads
Size: 20 × 17.5 mm
Breadboard-friendly, SMD design — no components on the back
