When you enter a URL into a web browser, it sends an HTTP request (also known as a GET request) to a web server. We’re going to control things by visiting a specific URL. So you might be wondering, “How do I control things from a web server that only processes and serves web pages?”. Wiring LEDs to ESP8266 NodeMCU The Idea Behind Using an ESP8266 Web Server to Control Things In Station (STA) mode, the ESP8266 connects to an existing WiFi network (the one created by your wireless router). This is possible because the ESP8266 can operate in three modes: Station (STA) mode, Soft Access Point (AP) mode, and both simultaneously. One of the most useful features of the ESP8266 is its ability to not only connect to an existing WiFi network and act as a Web Server, but also to create its own network, allowing other devices to connect directly to it and access web pages. The server then sends back the content of that web page or an error message if it can’t find it (like the famous 404 Error). In this protocol, a client starts a conversation by sending an HTTP request for a specific web page. A web client and a web server communicate using a special protocol known as Hypertext Transfer Protocol (HTTP). A web client is just a web browser that we use on our computers and phones. What exactly is a Web server and how does it work?Ī web server is a place where web pages are stored, processed, and served to web clients.
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