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Seeed Studio XIAO nRF52840 Sense Plus
Seeed Studio XIAO nRF52840 Sense Plus, powered by Nordic chipset with FPU, brings more SMD pins to this tiny Bluetooth senor dev board. While maintaining all the capabilities of the standard version including onboard IMU and PDM microphone, Bluetooth Low Energy 5.4, NFC, and low power consumption, this Plus variant features redesigned castellations and pad layout on the back, offering 9 additional GPIOs specifically for advanced Bluetooth projects requiring expanded I/Os via SMD board-to-board soldering. With native TensorFlow Lite, it's your ideal development platform for advanced embedded Machine Learning and AIoT projects.
User Manual / Datasheet / Example Codes Etc.
Features
- High-Performance MCU: Nordic Semiconductor‘s nRF52840 chip with FPU at 64 MHz, multiple development ports, compatible with Arduino/CircuitPython/MicroPython
- Onboard Sensing: Integrated 6-axis IMU and PDM microphone enable motion sensing and audio input, ideal for wearable devices and compact ML applications
- Advanced Wireless Connectivity: Bluetooth Low Energy 5.4 with built-in antenna and NFC support
- Efficient Power Management: 5 μA deep sleep consumption with integrated Li-ion battery charging
- Expanded 20 GPIOs: 9 extra 1.27mm pitch SMD castellation pins beyond standard XIAO nRF52840
- Universal Compatibility: Standard backside layout (with aligned battery pads, and debugger pads) for more to-be-released XIAO expansion boards
- Classic XIAO Form Factor: 21 x 17.8mm design with 2.54mm pin headers, single-sided mounting for wearables and space-constrained projects
- XIAO Accessory Add-ons Compatibility: Natively compatible with all the XIAO accessory add-ons of expansion, connectivity modules (LoRa, CAN_Bus, RS-485), sensors (2-Mic Array, Vision AI, mmWave Motion, Environmental sensing), and actuators (ePaper display, LED Matrix, relay and more).
Specifications
- Processor: Nordic nRF52840, ARM® Cortex®-M4 32-bit processor with FPU, 64 MHz
- Wireless Connectivity: Bluetooth Low Energy 5.4/Bluetooth Mesh/NFC
- Memory: 256KB RAM,1MB Flash 2MB onboard Flash
- Built-in Sensors
- 1x6 DOF IMU (LSM6DS3TR-C)
- 1xPDM Microphone
- Interfaces
- 1xI2C
- 2xUART
- 2xSPI
- 1xI2S
- PWM/Analog Pins: 20/6
- Onboard Buttons
- 1x Reset Button
- 1x User Button
- Onboard LEDs
- 1x 3-in-one LED
- 1x Charge LED
- Battery Charge Chip: BQ25101
- Programming Languages: Arduino/MicroPython/ CircuitPython
Applications
- Small and flexible wearable device
- Wifi/Bluetooth controlled wireless connection project
- Embedded Machine Learning Project
- IoT and TinyML AI applications
- Mini Arduino projects
Package Includes
- 1xSeeed Studio XIAO nRF52840 Sense Plus
PinOut
