Seeed XIAO BLE nRF52840 Sense

Reference: SEEED 102010469

12 Items

PRODUCT DETAILS

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: 3.3V@200mA	The same as XIAO BLE
Charging current: 50mA/100mA
Input voltage (VIN): 5V
Standby power consumption: <5μA