With Raspberry Pi and Wi-Fi, researchers built a wireless heart rate monitor - here's how

Here is a 180-word summary of the news article: Researchers have developed a wireless heart rate monitoring system using a Raspberry Pi and Wi-Fi. The system utilizes Wi-Fi signals to measure changes in the human body and detect heartbeats, eliminating the need for physical contact sensors. The device works by analyzing the disturbances in Wi-Fi signals caused by the movement of the chest during breathing and heartbeats. A Raspberry Pi computer processes this data and translates it into heart rate measurements. Tests showed the system can accurately detect heart rates, even at distances of up to 8 meters. The wireless heart rate monitor offers several advantages over traditional wearable devices. It is completely contactless, more comfortable for the user, and does not require batteries or recharging. Researchers believe this technology could eventually replace traditional heart rate monitors in medical settings and consumer wearables. Further development is needed to improve accuracy and reliability, but the initial results demonstrate the potential of using ubiquitous Wi-Fi signals for health monitoring applications.