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.

Processor	64 MHz core_m
RAM	Bluetooth
Wireless Type	Bluetooth
Brand	seeed studio
Series	nRF52840
Operating System	FreeRTOS
Item Weight	0.634 ounces
Product Dimensions	0.83 x 0.83 x 0.83 inches
Item Dimensions LxWxH	0.83 x 0.83 x 0.83 inches
Processor Brand	Nordic
Number of Processors	1
Manufacturer	seeed studio
ASIN	B09T94SZ8K
Date First Available	February 24, 2022

Seeed Studio XIAO nRF52840 Sense - Supports Arduino/CircuitPython - Bluetooth5.0 NFC with Onboard Antenna, MCU with 6-axis IMU Works with Amazon Sidewalk

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