Build IoT Health Trackers with Ease

Diving into biometric data collection has never been more accessible. The DFRobot Gravity Heart Rate Monitor Sensor is a micro-sized optical sensor designed to easily integrate with your favorite microcontrollers. Whether you are building a sleep monitor, an interactive art installation that responds to your heartbeat, or an IoT dashboard using the Blynk application, this sensor provides the raw pulse data you need to bring your code to life.

Optical PPG Technology Explained

This sensor utilizes Photoplethysmography (PPG), a simple yet highly effective optical technique. By shining a light into the skin and measuring the amount of light absorbed or reflected by the microvascular bed of tissues, it detects changes in blood volume. This allows the sensor to accurately map out the pulsatile component of your cardiac cycle. You can easily strap it to your finger, wrist, or earlobe using the included mounting holes and wrist belt.

Plug-and-Play Gravity Interface

Say goodbye to messy breadboards and confusing pinouts. This module features DFRobot's standardized Gravity Interface (PH2.0-3P). It is completely plug-and-play when used with a Gravity IO Sensor Shield. Operating on a wide 3.3V to 6V input range, it is natively compatible with 5V Arduino boards as well as 3.3V systems like the Raspberry Pi, Intel Edison, Joule, and Curie.

💡 Pro Tip from Our Technicians

"When working with this PPG sensor, stability is everything! This sensor is designed to work ONLY when the user is completely still. If you try to use it while walking or exercising, the optical readings will be highly inaccurate due to motion artifacts. Furthermore, please remember this is a DIY educational module, NOT a professional medical device, and should never be used for medical diagnosis. If you need help writing the Arduino code to filter out noise or sending the data to an IoT app, drop by our Sham Shui Po store! Our team at Sun Cheong Computer Co. Ltd. loves helping makers troubleshoot their STEM projects."