WiFi signals can measure heart rate—no wearables needed, #PulseFi

“Computer Science and Engineering Ph.D. student Nayan Bhatia demonstrates Pulse-Fi, technology that uses WiFi signals to measure a person’s heart rate. Photos by Erika Cardema/UC Santa Cruz” Image source News.UCSC.edu;

 

 

Pardon my tinfoil hat but it can be a little unsettling to acknowledge all the electromagnetic waves passing through us; you might as well make extra use of them. Researches at UC Santa Cruz have developed techniques to measure heart beats with Wi-fi. They call the system Pulse-Fi and they captured the readings with a variety of chips, including ESP32, and Raspberry Pi.

Via News at UC Santa Cruz

WiFi devices push out radio frequency waves into physical space around them and toward a receiving device, typically a computer or phone. As the waves pass through objects in space, some of the wave is absorbed into those objects, causing mathematically detectable changes in the wave.

Pulse-Fi uses a WiFi transmitter and receiver, which runs Pulse-Fi’s signal processing and machine learning algorithm. They trained the algorithm to distinguish even the faintest variations in signal caused by a human heart beat by filtering out all other changes to the signal in the environment or caused by activity like movement.

Learn more!

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Use a Pulse Sensor Amped and NeoPixel Ring to display your heart rate with the Adafruit Learning System

 

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