Can NodeMCU Act as a Web Server Yes Then How?


Scott Campbell

Can NodeMCU Act as a Web Server? Yes, It Can!

NodeMCU is a popular development board based on the ESP8266 WiFi module. While it is commonly used for IoT projects, it also has the capability to act as a web server.

In this tutorial, we will explore how you can set up NodeMCU as a web server and use it to serve web pages and handle HTTP requests.

Setting Up NodeMCU as a Web Server

To begin with, you need to have the Arduino IDE installed on your computer. If you haven’t already done so, head over to the official Arduino website and download the latest version.

Once you have the Arduino IDE set up, follow these steps to configure NodeMCU as a web server:

  • Step 1: Connect your NodeMCU board to your computer using a USB cable.
  • Step 2: Open the Arduino IDE and go to File > Examples > ESP8266WiFi > WiFiWebServer.
  • Step 3: In the code editor window, you will see an example sketch for a simple web server. Take some time to understand the code.
  • Step 4: Modify the code according to your needs.

    You can change the HTML content that is being served or add additional functionality.

  • Step 5: Make sure that you have selected the correct board and port in the Arduino IDE.
  • Step 6: Click on “Upload” to compile and upload the sketch to your NodeMCU board.
  • Step 7: Once the upload is complete, open the Serial Monitor in the Arduino IDE. You should see the IP address assigned to your NodeMCU board.

Accessing the Web Server

Now that you have set up NodeMCU as a web server, you can access it using any web browser on devices connected to the same network. Simply enter the IP address displayed in the Serial Monitor into the address bar of your browser.

By default, the web server serves a simple HTML page with buttons that allow you to control an LED connected to one of the GPIO pins on your NodeMCU board. You can customize this page and add more functionality by modifying the code in the sketch.

Handling HTTP Requests

NodeMCU’s web server is capable of handling various types of HTTP requests such as GET and POST. You can use these requests to interact with other devices or services over HTTP.

For example, you can use AJAX requests from a web page served by NodeMCU to send data to a remote server or fetch data from an API. This opens up endless possibilities for building interactive IoT applications using NodeMCU.


In this tutorial, we learned how NodeMCU can act as a web server and serve web pages. We explored how to set up NodeMCU as a web server using Arduino IDE and how to handle HTTP requests.

By leveraging its WiFi capabilities, we can build powerful IoT applications that interact with other devices and services over HTTP.

So go ahead, experiment with NodeMCU’s web server functionality, and unleash its full potential in your IoT projects!

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