Seeed Studio XIAO Nordic nRF52840 Sense Module

The Seeed Studio XIAO Nordic nRF52840 Sense Module is a compact yet powerful development board designed for AIoT and sensor-rich applications.

Powered by the advanced Nordic nRF52840 chipset, it offers Bluetooth 5.0 connectivity with low energy consumption, making it highly efficient for IoT, wearables, and smart devices.

This versatile nRF52840 module integrates an onboard IMU and PDM microphone, enabling motion tracking and audio input for embedded Machine Learning projects.

Its small form factor, rich features, and low-power performance make it an excellent choice for developers working on next-generation AI and IoT solutions.

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Features:

• Versatile Microcontroller: Incorporates the Nordic nRF52840 chip with FPU, working up to 64 MHz, mounted several development ports, supported by Arduino and CircuitPython.
• Wireless Capabilities: Support Bluetooth 5.0, BLE functionalities with integrated antenna, and NFC connectivity.
• Elaborate Power Design: Uses only 5 μA in deep sleep mode and supports lithium battery charge management.
• Advanced onboard functionality: Add a digital microphone and a 6-axis IMU to the compact board for embedded machine learning applications.
• Thumb-sized Design: 21 x 17.8mm, Seeed Studio XIAO series classic form-factor, appropriate for wearable devices.

Built-in Sensors Overview

The XIAO Nordic nRF52840 Sense module comes loaded with essential onboard sensors, making it ideal for AIoT, wearables, and low-power smart projects. Here is a quick overview:

• 6-Axis IMU: Detects motion, orientation, gestures, and vibration patterns for robotics and wearables.
• PDM Microphone: Enables sound detection, keyword spotting, and always-on audio triggers.
• Low-Power Sensor Fusion: Efficiently processes motion + audio data without draining the battery.
• BLE 5.0 Connectivity: Streams sensor data wirelessly to phones, gateways, or nearby IoT hubs.

Applications:

• Small and flexible wearable gadget.
• Wi-Fi/Bluetooth wireless connection project
• Embedded Machine Learning Project
• IoT and TinyML AI applications.
• Perfect for mini-Arduino projects.

Real-World AIoT Use Cases

The onboard motion and audio sensors make the nRF52840 Sense perfect for compact and intelligent IoT systems. Here are practical real-world applications:

• Gesture-Controlled Wearables: Use the IMU to trigger actions such as switching modes, controlling lights, or navigating menus.
• Sound-Activated Devices: Build voice-triggered gadgets or noise-level monitors for smart homes and environmental sensing.
• Personal Fitness & Health Trackers: Track steps, detect fall events, or monitor activity levels using motion data.
• Asset & Vibration Monitoring: Deploy as a battery-powered sensor node to track machine vibration trends or detect anomalies.
• BLE Sensor Beaconing: Broadcast motion or audio events to nearby gateways for processing and cloud uploads.

XIAO Nordic nRF52840 Sense Module Pinout Diagram