Build your own temperature and humidity sensor

Temperature and humidity sensors are important for quite a lot of functions, from monitoring the surroundings in your house to controlling industrial processes. Whereas there are various business sensors accessible, it may be enjoyable and rewarding to construct your individual.

On this article, we are going to present you find out how to construct a easy however efficient temperature and humidity sensor utilizing an Arduino microcontroller and a DHT22 sensor module. The DHT22 is a low-cost and easy-to-use sensor that may measure each temperature and humidity with good accuracy.


To construct your individual temperature and humidity sensor, you will want the next elements:

  • Arduino microcontroller (such because the Arduino Uno or Arduino Nano)
  • DHT22 temperature and humidity sensor module
  • Breadboard
  • Jumper wires
  • Energy provide (equivalent to a 9V battery or a USB adapter)
  • Enclosure (optionally available)


The meeting of the sensor may be very easy. Merely join the DHT22 sensor module to the Arduino microcontroller as follows:

  • DHT22 sensor module VCC pin to Arduino 5V pin
  • DHT22 sensor module GND pin to Arduino GND pin
  • DHT22 sensor module DATA pin to Arduino pin 2

As soon as the sensor is related, you may energy up the Arduino microcontroller and begin studying the temperature and humidity information.


If you wish to use your temperature and humidity sensor in a everlasting location, you may construct an enclosure for it. This may defend the sensor from mud and moisture.

You should use any kind of enclosure you want, however you will need to be sure that it has holes for the sensor probe and the ability provide connector. You may additionally wish to embody a show within the enclosure so to simply see the temperature and humidity information.


Temperature and humidity sensors can be utilized in quite a lot of functions. Listed here are just a few examples:

  • Residence automation: Temperature and humidity sensors can be utilized to automate your property. For instance, you might use a temperature sensor to activate the air conditioner when the temperature will get too excessive, or use a humidity sensor to activate the dehumidifier when the humidity will get too excessive.
  • Gardening: Temperature and humidity sensors can be utilized to watch the circumstances in your backyard. This data can assist you to water your vegetation on the proper time and defend them from excessive temperatures.
  • Industrial automation: Temperature and humidity sensors are utilized in quite a lot of industrial functions, equivalent to controlling the temperature and humidity in manufacturing services and warehouses.


Constructing your individual temperature and humidity sensor is a enjoyable and rewarding mission. Additionally it is a good way to find out about electronics and programming. With only a few easy elements, you may construct a sensor that can be utilized in quite a lot of functions.

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