stmievac lampa led

#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>

const char* ssid = "ntw";
const char* password = "pwd";

ESP8266WebServer server(80);

int pwmPin = D2; // PWM pin
int pwmValue = 0; // PWM hodnota
bool pwmEnabled = false; // Stav PWM

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to WiFi. IP address: ");
  Serial.println(WiFi.localIP());

  pinMode(pwmPin, OUTPUT);
  analogWriteFreq(5000); // Nastavenie frekvencie PWM na 5 kHz
  analogWrite(pwmPin, pwmValue);

  server.on("/", HTTP_GET, []() {
    String html = "<h1>Ovladanie PWM</h1>"
                  "<form action=\"/increase\" method=\"POST\"><input type=\"submit\" value=\"Zvysit PWM\" style=\"height:50px; width:100px\"></form>"
                  "<form action=\"/decrease\" method=\"POST\"><input type=\"submit\" value=\"Znizit PWM\" style=\"height:50px; width:100px\"></form>"
                  "<form action=\"/toggle\" method=\"POST\"><input type=\"submit\" value=\"Zapnut/Vypnut PWM\" style=\"height:50px; width:100px\"></form>";
    server.send(200, "text/html", html);
  });

  server.on("/increase", HTTP_POST, []() {
    pwmValue = min(pwmValue + 100, 1023); // Zvýšenie PWM hodnoty s ochranou proti pretečeniu
    analogWrite(pwmPin, pwmEnabled ? pwmValue : 0);
    Serial.println("Aktuálna hodnota PWM: " + String(pwmValue));
    server.sendHeader("Location", "/");
    server.send(303);
  });

  server.on("/decrease", HTTP_POST, []() {
    pwmValue = max(pwmValue - 100, 0); // Zníženie PWM hodnoty s ochranou proti podtečeniu
    analogWrite(pwmPin, pwmEnabled ? pwmValue : 0);
    Serial.println("Aktuálna hodnota PWM: " + String(pwmValue));
    server.sendHeader("Location", "/");
    server.send(303);
  });

  server.on("/toggle", HTTP_POST, []() {
    pwmEnabled = !pwmEnabled;
    analogWrite(pwmPin, pwmEnabled ? pwmValue : 0);
    Serial.println("PWM " + String(pwmEnabled ? "zapnuté" : "vypnuté"));
    server.sendHeader("Location", "/");
    server.send(303);
  });

  server.begin();
}

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