Opis

Konektori, žice, protobord

Seeed XIAO BLE nRF52840 Sense is a tiny Bluetooth BLE 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.

PRODUCT DETAILS

Note

We have provided Grove Starter Kit for Seeed Studio XIAO with courses, supporting all Seeed Studio XIAO development boards, which will help new developers quickly to get started and then proceed to make interesting individual projects.

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 digital microphone, real-time acquisition suitable for audio recognition projects
• Onboard 6-axis IMU which can be applied in TinyML projects like gesture recognition
• Single-sided components, surface mounting design
• Ideal for IoT/wearable project
• 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 can receive audio data 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

XIAO BLE Sense is compatible to the XIAO expansion board.

Application

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

Hardware Pinout

Seeed XIAO Series

Seeeduino XIAO series product selection reference is provided here. The table compares Seeedino XIAO, Seeed XIAO RP2040, Seeed XIAO BLE, and Seeed XIAO BLE Sense in detail in terms of processor, memory, interface, etc.

Item	Seeeduino XIAO	Seeed XIAO RP2040	Seeed XIAO BLE	Seeed XIAO BLE Sense
Processor	SAMD21 M0+@48MHz	RP2040 Dual-core M0+@133Mhz	nRF52840 M4F@64MHz	nRF52840 M4F@64MHz
Wireless Connectivity	N/A	N/A	Bluetooth 5.0/BLE/NFC	Bluetooth 5.0/BLE/NFC
Memory	32 KB SRAM 256KB FLASH	264 KB SRAM 2MB onboard Flash	256 KB RAM, 1MB Flash 2MB onboard Flash	256 KB RAM,1MB Flash 2MB onboard Flash
Built-in Sensors	N/A	N/A	N/A	6 DOF IMU (LSM6DS3TR-C), PDM Microphone
Interfaces	I2C/UART/SPI	I2C/UART/SPI	I2C/UART/SPI	I2C/UART/SPI
PWM/Analog Pins	11/11	11/4	11/6	11/6
Onboard Buttons	N/A	Reset/ Boot Button	Reset Button	Reset Button
Onboard LEDs	N/A	Full-color RGB/ 3-in-one LED	3-in-one LED/ Charge LED	3-in-one LED/ Charge LED
Battery Charge Chip	N/A	N/A	BQ25101	BQ25101
Programming Languages	Arduino/ CircuitPython	Arduino/ MicroPython/ CircuitPython	Arduino/ MicroPython/ CircuitPython	Arduino/ MicroPython/ CircuitPython

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 – nRF52840	x1
7 Pins Header	x2

ECCN/HTS

HSCODE	8543709990
USHSCODE	8471490000
UPC

FCC	1
CE	1