Description
Seeed Studio XIAO nRF52840 – Bluetooth 5.0 BLE Development Board
The Seeed Studio XIAO nRF52840 (102010448) is an ultra-compact, low-power Bluetooth development board designed for wearable electronics, wireless sensor networks, smart devices, and embedded IoT applications. Powered by the Nordic Semiconductor nRF52840 SoC, it features a 32-bit ARM Cortex-M4 processor with Floating Point Unit (FPU), operating at up to 64MHz for efficient embedded processing.
Featuring Bluetooth 5.0 Low Energy (BLE), NFC support, and an onboard antenna, the XIAO nRF52840 enables wireless communication for connected sensors, smart home devices, BLE beacons, and portable electronic projects.
The board includes 1MB internal Flash, 256KB RAM, and an additional 2MB QSPI Flash, providing memory resources for firmware, data storage, and embedded applications. Its compact 21 × 17.5mm form factor makes it ideal for space-constrained and battery-powered designs.
With 11 GPIO pins, six ADC channels, UART, I2C, SPI, and SWD interfaces, the XIAO nRF52840 offers flexible connectivity for sensors and peripheral devices. It also features an integrated BQ25101 lithium battery charging management IC and USB Type-C connectivity for power and programming.
Supporting Arduino IDE, CircuitPython, and MicroPython development, the Seeed Studio XIAO nRF52840 is suitable for students, makers, and professional embedded developers building Bluetooth-enabled applications.
Key Features
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Nordic nRF52840 Processor: Features a 32-bit ARM Cortex-M4 CPU with FPU operating at up to 64MHz.
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Bluetooth 5.0 Low Energy: Supports BLE wireless communication for IoT devices, wearables, and sensor networks.
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NFC Connectivity: Enables NFC-based applications using a suitable external antenna arrangement.
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1MB Flash and 256KB RAM: Provides onboard memory for embedded firmware and applications.
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2MB External QSPI Flash: Offers additional nonvolatile memory for application data.
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Ultra-Low Power Consumption: Supports deep-sleep current as low as approximately 5µA under specified conditions.
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Compact XIAO Form Factor: Measures just 21 × 17.5mm for miniature embedded projects.
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11 GPIO Pins: Supports digital input/output and PWM functionality for external components.
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Six ADC Channels: Enables analog sensor interfacing and measurements.
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Multiple Communication Interfaces: Includes UART, I2C, SPI, NFC, and SWD connectivity.
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Lithium Battery Charging Management: Integrated BQ25101 charging IC supports rechargeable battery applications.
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USB Type-C Interface: Provides a convenient connection for programming and power.
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Onboard BLE Antenna: Supports wireless communication without a separate Bluetooth antenna.
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Multi-Platform Development: Compatible with Arduino IDE, CircuitPython, and MicroPython.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Seeed Studio |
| Product Name | XIAO nRF52840 |
| Manufacturer Part Number | 102010448 |
| Product Type | Bluetooth BLE Development Board |
| Microcontroller | Nordic nRF52840 |
| Processor Architecture | 32-bit ARM Cortex-M4 with FPU |
| Maximum Clock Frequency | 64MHz |
| Internal Flash Memory | 1MB |
| SRAM | 256KB |
| External QSPI Flash | 2MB |
| Wireless Connectivity | Bluetooth 5.0 Low Energy |
| NFC Support | Yes |
| Bluetooth Antenna | Onboard |
| GPIO Pins | 11 |
| ADC Channels | 6 |
| Communication Interfaces | UART, I2C, SPI |
| Additional Interfaces | NFC, SWD |
| PWM Support | Yes |
| USB Interface | USB Type-C |
| USB Input Voltage | 5V DC |
| Circuit Operating Voltage | 3.3V |
| Charging Current | 50mA / 100mA |
| Battery Charger IC | BQ25101 |
| Deep-Sleep Current | As low as approximately 5µA |
| Board Dimensions | 21 × 17.5mm |
| Programming Support | Arduino IDE, CircuitPython, MicroPython |
Applications
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Wearable Electronics: Develop compact wearable devices and wireless monitoring systems.
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Bluetooth IoT Devices: Build wireless sensor nodes and BLE-connected embedded applications.
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BLE Beacons: Create proximity-based notification and identification systems.
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Smart Home Automation: Develop wireless switches, controls, and monitoring devices.
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Health and Fitness Prototypes: Interface external sensors for activity and environmental monitoring.
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Wireless Sensor Networks: Transmit measurements from compatible sensors using Bluetooth Low Energy.
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Battery-Powered Devices: Develop energy-efficient portable electronic products.
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Human Interface Devices: Build BLE keyboards, controllers, and other input devices using suitable firmware.
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Embedded Machine Learning: Explore TinyML applications using the ARM Cortex-M4 processor.
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Educational Projects: Learn Bluetooth communication, microcontroller programming, and embedded electronics.
Package Contents
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1 × Seeed Studio XIAO nRF52840 Development Board
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2 × 7-Pin Male Headers (Unsoldered)
Additional Information
The XIAO nRF52840 is the standard Bluetooth development board, not the XIAO nRF52840 Sense variant. The standard board does not include the Sense version's onboard microphone or 6-axis IMU.
This board supports Bluetooth Low Energy but does not include WiFi connectivity. A suitable external battery is required for standalone battery-powered operation.
For setup instructions, pinout diagrams, programming examples, and technical guidance, refer to the Seeed Studio XIAO nRF52840 Official Wiki.