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DHT11 Temperature and Humidity Sensor with an Arduino Uno

Posted by AlexChu, 16/09/2017

Here we’ll introduce how to get started with a DHT11 sensor so you can incorporate it into your projects. It’s super simple to start-up and will get you moving onto adding components in no time.
The DHT11 sensor is an easy way to quickly measure surrounding air temperature and humidity. It’s a great little device to slip into environmental control systems, weather stations, and garden monitoring systems. For this introduction, a DHT11 sensor pre-mounted to a PCB was used which eliminates the need to manually place a 10k Ohm resistor and an additional unused pin.

Hardware

Firmware

First, let’s hook up the sensor to the Arduino Uno. You don’t have to use a breadboard, but we did here.

Connection:

DHT11Arduino Uno
GNDGND
VCCVCC
DataA0

{a picture for connection}

Next, let’s run an example code

Open the serial monitor:

We recommend downloading the DHT11 library for future use of the sensor.

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