.

ESP-IDF_Robot/tutorial/docs/build/html/data.html

@@ -62,6 +62,13 @@ It’s intended to be sent from a transmitting device (like a remote control or
 <p>When used with communication protocols like ESP-NOW, this struct is <strong>encoded</strong> into a byte stream, then
 <strong>transmitted</strong> at regular intervals or in response to user input, and finally
 <strong>decoded</strong> on the receiving end to control hardware.</p>
+<div class="admonition-what-is-struct admonition">
+<p class="admonition-title">What is struct?</p>
+<p>In C programming, a struct (short for structure) is a user-defined data type that lets you group multiple variables of different types together under a
+single name. It’s like a container that holds related information — perfect for organizing data that logically belongs together. Structs are especially
+powerful in systems programming, embedded projects, and when dealing with raw binary data — like parsing sensor input or transmitting control packets over
+ESP-NOW.</p>
+</div>
 <section id="data-payload">
 <h2>Data Payload<a class="headerlink" href="#data-payload" title="Link to this heading">¶</a></h2>
 <p><em>x_axis</em> and <em>y_axis</em> fields capture analog input from a joystick, determining direction and speed.