#Arduino temperature sensor how to#
#Arduino temperature sensor serial#

Due to better range and accuracy, DHT22 is costlier than DHT11.Įssentially a Barometric Pressure Sensor, the BMP180 by Bosch, can also measure temperature.

The pinout of DHT22 Sensor is same as that of DHT11. Often DHT11 is available in Blue coloured housing and DHT22 is available in White coloured housing. The DHT11 is a resistive type Relative Humidity Sensor while the DHT22 is a capacitive type Relative Humidity Sensor. DHT22 Temperature and Humidity SensorĪlthough both DHT11 and DHT22 appear to be same, there is one main difference between those two. Hence, the DHT22, which is also a Relative Humidity Sensor (hence, measures both Humidity and Temperature) is considered to be a better alternative. Though the DHT11 is a great choice for simple applications, its range and accuracy might be a limiting factor. They are LM34, which is calibrated for temperature in Fahrenheit and LM335, which is calibrated for temperature in Kelvin. There are two other Temperature Sensors similar to LM35. What the transfer function means is that for every degree Celsius rise in temperature, the output voltage increases by 10mV. V OUT = 10mV/ 0C x T, where V OUT is the output voltage, T is the temperature in 0C. The output analog voltage is linearly proportional to temperature in Centigrade. LM35 is an Analog Temperature Sensor which is calibrated directly in Celsius. It is one of the most popular temperature sensors available out there, which is being used even today.

But a few years ago, if we speak about temperature sensor, then LM35 is the only choice (at least for me). Today, there are a variety of Temperature Sensors that are marketed towards DIY and hobbyist community. So, if you are looking for the perfect Arduino Temperature Sensor for your DIY project, then go through the list and make the decision. These sensors can be used with other developments boards like STM32F103C8T6 Blue Pill Board, Raspberry Pi, ESP8266 or ESP32. I made a list of some commonly found Temperature Sensors for Arduino, with some basic specifications listed out for each sensor. Some are relatively cheap and easy to use while some are expensive with great accuracy. There are a bunch of Arduino compatible Temperature Sensors available in the market. You can continuously monitor the changes in temperature and log the data for further analysis. Measuring Temperature of an object or a room using Arduino is a very useful project. Since this article is all about Arduino Compatible Temperature Sensors, let us focus on them. Temperature Sensor and Humidity Sensor (often they come in a single package, but discreet components are also available) are the main ingredients of an Arduino Weather Station. It doesn’t have to predict rainfall or storms but simply measure the basic stuff like Temperature and Humidity.

#Arduino temperature sensor serial#

At the end we will print the temperature and the humidity values on the serial monitor.After Blinking LEDs and controlling Relays using Arduino, every hobbyist, who is actively making DIY projects, plans on building a Weather Station.

If you use the DHT11 sensor you will need to you the read11() function.

Using the read22() function we will read the data from the sensor and put the values of the temperature and the humidity into the t and h variables. In the setup section we need to initiate the serial communication because we will use the serial monitor to print the results.

#Arduino temperature sensor how to#

Related tutorial: Learn how to build an Arduino based Wireless Weather Station Source Codeįirst we need to included the DHT library which can be found from the Arduino official website, then define the pin number to which our sensor is connected and create a DHT object. However, we don’t have to worry much about these timing diagrams because we will use the DHT library which takes care of everything. This protocol requires precise timing and the timing diagrams for getting the data from the sensors can be found from the datasheets of the sensors. The DHTXX sensors have their own single wire protocol used for transferring the data.