tecno4

Today we are going to look at five different sensors that can be used to measure temperature with an Arduino.

El sensor de temperatura y humedad DHT22 o AM2302 se une a la familia de los sensores DHT, de los que hasta ahora solo conocíamos a su hermano pequeño el sensor de temperatura y humedad DHT11. El sensor DHT22 supone una mejora considerable en las características técnicas con respecto al DHT11 a cambio de un pequeño incremento en el precio.

This tutorial covers the low cost DHT temperature & humidity sensors. These sensors are very basic and slow, but are great for hobbyists who want to do some basic data logging. The DHT sensors are made of two parts, a capacitive humidity sensor and a thermistor. There is also a very basic chip inside that does some analog to digital conversion and spits out a digital signal with the temperature and humidity. The digital signal is fairly easy to read using any microcontroller.