XIAO nRF52840 Sense
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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
Section titled “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
Section titled “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)
Section titled “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.