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Hey everyone, welcome back to Arduino intro
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Today we're diving into the world of temperature and humidity sensors with the DHT11 in Arduino
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We'll explain what the DHT11 sensor is and show you how to use it to display temperature and humidity readings on the serial monitor
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Let's get started. The DHT11 is a basic low cost digital temperature and humidity sensor
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It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and it spits out a digital signal on the data pin
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It's simple to use, but requires careful timing to grab data. The DHT11 temperature and humidity sensor module we're using
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has three pins, VCC, data and ground. Now let's wire the DHT11 sensor to the Arduino
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Here's how to connect it. DHT11 sensor VCC to 5V on Arduino, GND to GND on Arduino
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data pin to digital pin 5 on Arduino. Next, we'll need to install the DHT library in the Arduino IDE
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This library simplifies the process of reading data from the sensor. To install it, you need to download it first
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I'll be posting the link to the library in the description. After downloading, open your Arduino IDE, go to sketch
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include library, add zip library, locate the downloaded zip file and click open to install
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With the library installed, it's time to write some code. This code will read the temperature and humidity from the DHT11 sensor
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and print it to the serial monitor. Let's break down the code. First, we include the necessary library DHT.H for the DHT11 sensor
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We create an instance of the DHT class for the DHT11 sensor
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We define the pin the DHT11 is connected to with hash define DHT11 underscore pin 5
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In the setup function, we initialize serial communication with serial dot begin 9600
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In the loop function, we read the temperature and humidity using DHT11 dot read 11 DHT11 underscore pin
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We then print the temperature and humidity values to the serial monitor with serial dot print and serial dot print line
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Finally, we add a delay of 2000 milliseconds, two seconds between each reading to allow the sensor to stabilize
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Now let's upload the code to the Arduino and see it in action. Open the serial monitor to see the temperature and humidity
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readings every two seconds. As you can see, the temperature and humidity readings
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are now displayed on the serial monitor. This simple project is a great starting point for more advanced weather stations
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or environmental monitoring systems. And there you have it. A straightforward way to read temperature and humidity
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using the DHT11 sensor and an Arduino. If you enjoyed this video, please give it a thumbs up
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and subscribe to Arduino intro for more exciting projects. Leave a comment below if you have any questions or suggestions
