🌐 ماموریت ۸۹: کلید LED در صفحه‌ی وب

سیم‌کشی

1. ESP32 DevKit (D4) ⟷ مقاومت 220Ω (PIN1)
2. مقاومت 220Ω (PIN2) ⟷ LED (Red) (ANODE)
3. LED (Red) (CATHODE) ⟷ ESP32 DevKit (GND1)

کد

// ESP32 web server: /on and /off switch the LED on GPIO4
#include <WiFi.h>
#include <WebServer.h>

WebServer server(80);
const int LED = 4;

void setup() {
  Serial.begin(115200);
  pinMode(LED, OUTPUT);
  WiFi.begin("MyHome", "12345678");
  while (WiFi.status() != WL_CONNECTED) delay(200);
  Serial.println(WiFi.localIP());

  server.on("/", []() {
    server.send(200, "text/html", "<h2>LED</h2><a href='/on'>ON</a> | <a href='/off'>OFF</a>");
  });
  server.on("/on", []() {
    digitalWrite(LED, HIGH);
    server.send(200, "text/html", "LED is ON <a href='/'>back</a>");
  });
  server.on("/off", []() {
    digitalWrite(LED, LOW);
    server.send(200, "text/html", "LED is OFF <a href='/'>back</a>");
  });
  server.begin();
}

void loop() {
  server.handleClient();
}