Before you decide to click away, thinking we’re talking about some heart rate monitor that connects to a display using WiFi, wait! Pulse-Fi is a system that monitors heart rate using the ...

Thus, they entered a heart rate sensor to our 2025 One Hertz Challenge! The build is based around a Wemos D1 mini, a ESP8266 development board.

The type of band used can also impact heart rate monitoring. Some accessory bands, especially those that are loose-fitting, may not work well with the heart rate sensor.