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.

In this study, a flexible capacitive pressure sensor based on filter paper substrate is proposed. The electric double layer (EDL) structure was constructed through the introduction of ionic liquid (IL ...

A new blood pressure (BP) sensor, also named sphygmomanometer, is developed in this paper for estimating BPs accurately from fingertips. The hardware of the sensor is a low-cost optical CMOS imaging ...

Learn how to interface ESP32 thermal printer with complete tutorial. Includes PNP-500 wiring, Arduino code, circuit diagrams, and projects for receipt printing, barcodes, and QR codes. Perfect for ...

Bosch Sensortec BMP180, BMP280, BME280, BMP388 temperature, atmospheric pressure and humidity sensors BMP180 (pdf reference), BMP280 (pdf reference) and BME280 (pdf reference) are populare sensors ...