This is an Arduino library for the calibrated AM2302/AM2303 digital temperature and relative humidity sensor on a DHT22 breakout PCB.

Note that the temperature and humidity values are recalculated on every call to getHumidity () and getTemperature (). If you're worried about the extra cycles, you should make sure to cache these ...

Most relative humidity sensors are resistive or capacitive sensors. It’s a fact that the resistance and capacitance of a vast majority of such sensors also depend on the surrounding temperature and a ...

The traditional cable data transmission is high cost and big interference. instead, the wireless data transmission has advantages like: low cost, better applicability and lower interference. So, a ...

There’s no lag, as there can be with point-and-shoots and mirrorless cameras as the sensor has to transfer what it is seeing to a separate digital display elsewhere on the camera.

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.

Installing your home security system yourself can save you hundreds of dollars. These are the best DIY options, with and without professional monitoring.

If you're thinking about buying or upgrading your camera, these are the best full-frame models we've tested.