XIAO nRF52840 Sense

The board as it appears on the Velxio canvas, with its full pin map read live from the simulator (regenerated by scripts/gen-boards.mjs, so it always matches what you can wire).

Family: Pro boards · Languages: Arduino C++

About this board

The Nordic nRF52840 in the XIAO footprint, Sense variant: a Cortex-M4F at 64 MHz with a 6-axis IMU (LSM6DS3TR-C) and a PDM microphone on board. It runs on an in-browser engine that boots the firmware Seeed’s own nRF52 core produces, so GPIO, ADC, PWM, Wire and SPI behave as they do over USB.

The IMU is live: press Sensors on the canvas toolbar and drag the Tilt pad, and the part reports that gravity at its real I2C address, 0x6A. Bluetooth is not emulated.

Start here

• Blink — the shortest check that the board and toolchain work.
• OLED over I2C — an SSD1306 on the header pins.
• Knob and button — analog in, digital in, an LED out.

Pins (25)

• 2
• D0
• 3
• D1
• 28
• D2
• 29
• D3
• 4
• D4
• 5
• D5
• 43
• D6
• 5V
• GND
• 3V3
• 47
• D10
• 46
• D9
• 45
• D8
• 44
• D7

Every pin above is clickable on the canvas — click one to start a wire. Board-level behavior, quirks and example links live on the family page.