If you want to measure humidity (and temperature, and maybe even barometric pressure) in a device that you’re building, have a look at this comprehensive test of seven different options. We&#… ...

DHT22 humidity sensor 1 Articles . Coin-Op Weather. July 8, 2015 by Dan Maloney 1 Comment ... temperature and humidity sensors, an RTC, and a Bluetooth module for uploading data to a phone.

It comes with a built-in DHT22/AM2302 temperature and humidity sensor and has slots for a mini OLED display, waterproof DS18B20 temperature sensor, ...

The circuit shown in the figure measures relative humidity in air at the low temperatures found in applications like cold storage of food items and greenhouses.