DHT11 is one of the most used Temperature and Humidity Sensor. It is cheap, compact and provides a reliable data, it is best for a DIY electronics projects. The DHT11 can measure Temperature between 0 to 50° C with ±2 °C accuracy. It can measure Humidity between 20 to 80% with ±5% accuracy. DHT11 interfacing with arduino and weather station DHT11 sensor is used to measure the temperature and humidity. It has a resistive humidity sensing component and a negative temperature coefficient (NTC). An 8 bit MCU is also connected in it which is.

Robo India presents tutorial on how to read temperature and humidity data through DHT11 sensor using ESP8266 wifi module on NODEMCU LUA platform.

1. Introduction:

The DHT11 is chosen because it is lab calibrated, accurate and stable and its signal output is digital. Most important of all, it is relatively inexpensive for the given performance. Below is the pinout of the sensor.

2. Understanding DHT11 sensor

DHT11 sensor gives humidity and temperature data. It has got following pin interface.

3. Circuit

Make the following connections –

4. Library File

Following two libraries will be required to run this code. Download the zip file extract the same and copy this to your Arduino library folder.

This library file should be placed at the install folder of Arduino. I have a 64 bit Win7 OS and my arduino library folder address is located at

C:Program Files (x86)Arduinolibraries

Library 2: You may download library file from here.

5. Programming
You may download this Arduino Sketch from here.

6. Output

Upload the above code to the NodeMCU and open serial monitor. Following output should be shown on the serial monitor.

If you have any query please write us at support@roboindia.com

Thanks and Regards
Content Development Team
Robo India
https://roboindia.com

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