The DFRobot heart rate sensor is a compact pulse monitor designed for Arduino microcontrollers, utilizing PPG (photoplethysmography) techniques to detect blood volume changes in tissues. It features two attachment holes for easy mounting on belts or other body parts like fingers, wrists, or earlobes. The sensor employs a Gravity Interface for plug-and-play functionality, with compatibility extended to Raspberry Pi, Intel Edison, Joule, and Curie using a 3.3V input voltage. However, it's important to note that this sensor is not a medical device and should not be used for diagnosing or treating medical conditions. Additionally, accurate readings require the user to remain stationary during measurement.

Features:

1. Compact design for Arduino microcontrollers.
2. Utilizes PPG techniques for pulse monitoring.
3. Can be attached to belts, fingers, wrists, or earlobes.
4. Supports plug-and-play functionality with a Gravity Interface.
5. Compatible with Raspberry Pi, Intel Edison, Joule, and Curie using 3.3V input voltage.

Specifications:

• Input Voltage (Vin): 3.3 - 6V (5V recommended)
• Output Voltage: 0 - Vin (Analog), 0/ Vin (Digital)
• Operating Current: <10mA
• Dimension: 28 x 24(mm), 1.102" x 0.945"(in)
• Interface Type: PH2.0-3P

IoT Based Heart Rate Monitoring System is a very basic project on sending the pulse rate to Blynk Application and monitoring it from anywhere.

Pinout: