Connected IoT devices and wireless sensor nodes
On-board radio: Bluetooth Low Energy 5.x / Mesh; NFC.
Engineering inference
Seeed Studio
Seeed Studio XIAO nRF52840 Sense
Thumb-sized (21×17.8 mm) nRF52840 board (64 MHz Cortex-M4F, 1 MB flash + 2 MB QSPI flash, 256 KB RAM, Bluetooth 5 / NFC) with 6-DoF IMU (LSM6DS3TR-C) and PDM microphone, Li-ion charger (BQ25101), USB-C, RGB LED, 11 GPIO / 6 ADC castellated pads + SWD/NFC/battery back pads; <5 µA standby.
102010469Development boardPrice$15.90Seeed Studio · unknown
Buy at Seeed Studio Board essentials
Facts about the complete product. Unknown values remain open design questions.
- Exposed GPIO
- 11
- Board I/O voltage
- 3.3 V
- Board flash capacity
- 1 MiB
- Board SRAM capacity
- 256 KiB
A good fit for
Guidance to help you shortlist. The basis is shown for each recommendation.
Battery-powered and portable builds
On-board LiPo charger (Texas Instruments BQ25101YFPT) — run from a cell and charge over USB.
Engineering inferenceSensor fusion and on-device ML (TinyML)
On-board imu, microphone alongside the MCU — motion and audio data without extra wiring.
Engineering inferenceCustom USB devices (HID, MIDI, serial)
USB is on the main chip (nRF52840), so the board can enumerate as a keyboard, MIDI device or CDC serial port.
Engineering inferenceSpace-constrained and embedded builds
21.0 × 17.8 mm footprint.
Engineering inferenceLearning and fast prototyping
Programs from Arduino, MicroPython, CircuitPython.
Engineering inferenceInside this board
The board is the parent product. Each chip has its own memory, pins, capabilities and thermal limits.
main processor
nRF52840-QIAA
Nordic Semiconductor
a9738595-460f-5e6b-890e-4787635efade--mcu- Architecture
- Arm Cortex-M4 with FPU
- Documented clock
- 64 MHz
- Chip / in-package flash
- 1 MiB
- On-chip SRAM
- 256 KiB
imu
LSM6DS3TR-C
STMicroelectronics
a9738595-460f-5e6b-890e-4787635efade--u3microphone
MSM261D3526H1CPM
MEMSensing
a9738595-460f-5e6b-890e-4787635efade--mic1battery charger
BQ25101YFPT
Texas Instruments
a9738595-460f-5e6b-890e-4787635efade--u2ldo regulator
SGM2040-3.3YUDH4G/TR
SG Micro
a9738595-460f-5e6b-890e-4787635efade--u6flash memory
P25Q16H-UXH-IR
Puya
a9738595-460f-5e6b-890e-4787635efade--u7FAQ
Seeed Studio XIAO nRF52840 Sense questions
What microcontroller does the Seeed Studio XIAO nRF52840 Sense use?
The Seeed Studio XIAO nRF52840 Sense is built around the nRF52840-QIAA, alongside LSM6DS3TR-C, MSM261D3526H1CPM, BQ25101YFPT, SGM2040-3.3YUDH4G/TR.
How many GPIO pins does the Seeed Studio XIAO nRF52840 Sense have?
11 GPIO pins are exposed. Xirkit documents 22 board pins, 14 of them with pin-level electrical limits.
Are the Seeed Studio XIAO nRF52840 Sense I/O pins 5 V tolerant?
No. The I/O pins are not 5 V tolerant — they run at 3.3 V logic; use a level shifter for 5 V signals. Input-high threshold: 2.31–3.3 V.
How much current can a Seeed Studio XIAO nRF52840 Sense GPIO pin source?
Documented output-high current per pin: 1–4 mA. Values are traced to the chip datasheet; see the pinout table for per-pin limits and conditions.
What voltage powers the Seeed Studio XIAO nRF52840 Sense?
Supply range 5–5 V. Power inputs: 5V, BAT+.
How much does the Seeed Studio XIAO nRF52840 Sense cost?
From $15.9 at Seeed Studio. Prices are observed unit prices before tax and shipping.
What are the Seeed Studio XIAO nRF52840 Sense dimensions?
21 × 17.8 × 1.6 mm. A STEP model is available for enclosure fit checks.
Which interfaces does the Seeed Studio XIAO nRF52840 Sense support?
gpio, pwm, adc, pin_select, i2c, uart, spi, nfc, debug, control, usb.
How do I program the Seeed Studio XIAO nRF52840 Sense?
Supported frameworks: Arduino, MicroPython, CircuitPython.
Where does this Seeed Studio XIAO nRF52840 Sense data come from?
Every value in this record is traced to a source — 2 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed.
Data & sources