Seeed Xiao BLE Nrf52840 Sense - Tinyml/Tensorflow Lite- Imu / Microphone - Bluetooth5

• Type: Development Board
• Trademark: seeed
• Origin: Gua
• Model NO.: BLE nRF52840

Product Description

Seeed XIAO BLE nRF52840

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.

 

Title goes here.

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.

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: 3.3V@200mA
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

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Attention:

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

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Part List
Seeed XIAO BLE Sense - nRF52840x1

7 Pins Headerx2