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Seeed XIAO BLE nRF52840 Sense - TinyML/TensorFlow Lite- IMU / Microphone - Bluetooth5

Seeed XIAO BLE nRF52840 Sense is a tiny Bluetooth LE development board designed for IoT and AI applications. It features an onboard antenna, 6 Dof IMU, microphone, all of which make it an ideal board to run AI using TinyML and TensorFlow Lite.

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PRODUCT DETAILS

Note

This product is limited to one unit per customer.

Features

  • Powerful CPU: Nordic nRF52840, ARM® Cortex™-M4 32-bit processor with FPU operating at 64 MHz
  • Wireless capabilities: Bluetooth 5.0, NFC, and ZigBee module with onboard Bluetooth antenna
  • Ultra-small size: 21 x 17.5mm, Seeed Xiao series classic form-factor for wearable devices
  • Ultra-low sleep power: 5 μA, deep sleep model
  • Battery charging chip: BQ25101 chip supported lithium battery charge management
  • Rich interface: 1x Reset button, Ix UART, 1x IIC, 1x SPI, 1x NFC, 1x SWD, 11x GPIO, 6x ADC, 1x Three-in-one LED,1x User LED
  • Onboard 2 MB flash
  • Onboard microphone
  • Onboard 6-axis IMU
  • Single-sided components, surface mounting design
  • Corresponded to TinyML AI project: Sensing, Processing, Communication 3 in 1 Node

Description

As the advanced version of the board XIAO BLE, Seeed XIAO BLE Sense has equipped a powerful Nordic nRF52840 MCU which is designed in a Bluetooth 5.0 module, built around 32-bit ARM® Cortex™-M4 CPU with Floating-Point Unit(FPU) operating at 64Mhz. With the capabilities of wireless connection, it still remains the Seeed XIAO series classic form-factor of small and exquisite which can be used for wearable devices and Internet of Things projects. Furthermore, it only costs 5 μA in the deep sleep model and it supports battery charge management because of the BQ25101 chip. 

 

In addition, it carries two extra onboard sensors. One of them is a digital microphone created through Pulse Density Modulation(PDM) module on the nRF52840 chip. It can receive audio data in real-time which allows it can be used for audio recognition. The board not only receives audio data but also can speak through the MSM261D3526H1CPM microphone. The other one is 6-axis Inertial Measurement Unit(IMU) which can be applied in TinyML projects like gesture recognition. These onboard sensors provide a great convenience for users and the ultra-small size feature of the board has still remained. 

 

Same as XIAO BLE, Seeed XIAO BLE Sense contains a wealthy interface. The first thing to note is that the Near Field Communication(NFC) is functional on the board. Secondly, there is a tiny and elegant reset button on one side of the Type-C interface. On the other side, it is designed in a three-in-one LED along with a power LED. There are 11 digital i/o that can be used as PWM pins and 6 analog i/o that can be used as ADC pins. It supports UART, IIC, and SPI all three common serial ports. Same as Seeed XIAO RP2040, it has an onboard 2 MB flash which means it can also be programmed by Arduino, MicroPython, CircuitPython, or other program languages. 

 

As XIAO form factor, XIAO BLE Sense supports both Grove Shield for XIAO and XIAO Expansion board. There is a slight difference between the pins and refer to the Pinout it is easy to manage. If you are interested in programming embedded machine learning, we have Codecraft graphic programming that can help you quickly start your own TinyML project. And we have set up a #tinyml channel on our Discord server, please click to join for 24/7 making, sharing, discussing, and helping each other out. We can do this all day.

Specification

Item

Seeed XIAO BLE - nRF52840

Seeed XIAO BLE Sense - nRF52840

  Processor

  Nordic nRF52840

  The same as XIAO BLE

  ARM® Cortex®-M4 with FPU run up to 64 MHz

  Wireless

  Bluetooth 5.0/NFC/Zigbee

  The same as XIAO BLE

  On-chip Memory

  1 MB flash and 256 kB RAM

  The same as XIAO BLE

  Onboard Memory

  2 MB QSPI flash

  The same as XIAO BLE

  Interface

  1xUART, 1xIIC, 1xSPI, 1xNFC, 1xSWD,

  The same as XIAO BLE

  11xGPIO(PWM), 6xADC

  Sensors

 

  Onboard PDM digital microphone

  Onboard 6-axis IMU

  Dimensions

  21 x 17.5mm

  The same as XIAO BLE

   Power

  Circuit operating voltage: [email protected]

  The same as XIAO BLE

  Charging current: 50mA/100mA

  Input voltage (VIN): 5V

  Standby power consumption:  <5μA

Application

  • Wearable devices
  • Wireless connect
  • Embedded machine learning projects
  • IoT and TinyML AI application
  • Perfect for mini Arduino projects

Hardware Pinout

Seeed XIAO series


Attention:

All the I/O pins are 3.3V, please do not input more than 3.3V, otherwise, the CPU may be damaged.


Part List

Seeed XIAO BLE Sense - nRF52840x1
7 Pins Header x2

ECCN/HTS

HSCODE 8543709990
UPC
FCC 1
CE 1

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