Seeed XIAO nRF52840 Sense Plus

This is the XIAO nRF52840 Sense with a little bit extra on board! It has the same Nordic nRF52840 ARM Cortex-M4 32-bit processor with FPU at 64Mhz, Bluetooth 5.0 with built-in antenna and NFC support, 6-axis IMU and PDM microphone and 5 μA deep sleep power consumption. What's Been Added

* There are now 20 GPIO (PWM) pins instead of 11 for projects needing expanded I/Os via SMD board-to-board soldering

* An I2S and an extra SPI connection have been added

* The NFC pins have been exposed for easier integration into IoT and smart card projects

* The BAT pin has been repositioned for easier soldering

Note: The XIAO Sense Plus doesn't come with 7-pin headers as it's designed for SMD board-to-board soldering. If you'd still like some 7-pin headers, click here to see them in our store. Click here to see our other XIAO boards in the store. Features

* Nordic Semiconductor‘s nRF52840 chip with FPU at 64 MHz, multiple development ports, compatible with Arduino/CircuitPython/MicroPython

* Integrated 6-axis IMU and PDM microphone enable motion sensing and audio input, ideal for wearable devices and compact ML applications

* Bluetooth 5.0 with built-in antenna and NFC support

* 5 μA deep sleep consumption with integrated Li-ion battery charging

* 9 extra 1.27mm pitch SMD castellation pins beyond standard XIAO nRF52840

* Standard backside layout (with aligned battery pads, and debugger pads) for more to-be-released XIAO expansion boards

* 21 x 17.8mm design with 2.54mm pin headers, single-sided mounting for wearables and space-constrained projects

* Natively compatible with all the XIAO accessory add-ons of expansion, connectivity modules (LoRa, CANBus, RS-485), sensors (2-Mic Array, Vision AI, mmWave Motion, Environmental sensing), and actuators (ePaper display, LED Matrix, relay and more).

* Product Number: Seeed 102010694

What's on Board

Specifications

Processor Nordic nRF52840, ARM Cortex-M4 32-bit processor with FPU, 64 MHz

Wireless Connectivity Bluetooth 5.0/BLE/NFC

Memory 256KB RAM, 1MB Flash 2MB onboard Flash

Built-in Sensors 6 DOF IMU (LSM6DS3TR-C), PDM Microphone

Interfaces 1x I2C, 2x UART, 2x SPI, 1x I2S

PWM/Analogue Pins 20/6

Buttons Reset Button

LEDs 3-in-one LED/ Charge LED

Battery Charge Chip BQ25101

Programming Languages Arduino/MicroPython/ CircuitPython

Resources

* Product Wiki

* nRF52840 datasheet

* Schematic

* KiCAD file

Pinout

Package Contents

* 1x XIAO nRF52840 Sense Plus