A wireless heart rate monitor powered by Raspberry Pi and Wi-Fi - how it works

A group of researchers have developed a wireless heart rate monitoring system powered by a Raspberry Pi and Wi-Fi. The system utilizes radio frequency (RF) signals to measure heart rate without the need for physical contact with the body. The device works by transmitting a low-power radio signal towards the user, which is then reflected off the user's body. Changes in the reflected signal, caused by the user's heartbeat, are detected and used to calculate the heart rate. This data is then transmitted wirelessly to a nearby device, such as a smartphone or laptop, using Wi-Fi. The researchers claim that this approach is more cost-effective and energy-efficient compared to traditional heart rate monitoring wearables, which often require bulky sensors and batteries. Additionally, the wireless nature of the system eliminates the need for physical contact, making it more comfortable and convenient for users. The researchers believe that this technology could have various applications, from healthcare monitoring to fitness tracking, and could potentially replace traditional wearable devices in the future.