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.

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

Specifications:

• Processor:
• Nordic nRF52840
• ARM Cortex-M4 with FPU run up to 64 MHz
• Wireless: Bluetooth 5.0/NFC/Zigbee
• On-chip Memory: 1 MB flash and 256 kB RAM
• Onboard Memory: 2 MB QSPI flash
• Interface:
• 1xUART, 1xIIC, 1xSPI, 1xNFC, 1xSWD,
• 11xGPIO(PWM), 6xADC
• Sensors:
• Onboard PDM digital microphone
• Onboard 6-axis IMU
• Dimensions: 1 x 17.5mm
• Power:
• Circuit operating voltage: 3.3V@200mA
• The same as XIAO BLE
• Charging current: 50mA/100mA
• Input voltage (VIN): 5V
• Standby power consumption:  <5μA

Applications:

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

Documents:

• BQ25101 Datasheet
• ST LSM6DS3TR Datasheet
• mic-MSM261D3526H1CPM
• Nano BLE MCU-nRF52840 PS v1.1
• Bottom-pad-positioning
• Seeed XIAO nRF52840 v1.0 SCH
• Flash_P25Q16H-UXH-IR_Datasheet

Package Includes:

• 1 x Seeed XIAO BLE Sense - nRF52840
• 2 x 7 Pins Header