Wiring
Check pinout, power supply, common GND and voltage levels before connecting the module.
Full code
#include <WiFi.h>
#include <WebServer.h>
WebServer server(80);
void handleRoot() {
server.send(200, "text/plain", "Hello from ESP32");
}
void setup() {
WiFi.begin("YOUR_WIFI", "YOUR_PASSWORD");
while (WiFi.status() != WL_CONNECTED) delay(500);
server.on("/", handleRoot);
server.begin();
}
void loop() {
server.handleClient();
}How it works
This lesson matches the page title and gives a clean starting point for this exact example.
Common mistakes
Check board selection, wiring, libraries, power supply and serial monitor baud rate.