KHF Web Server

/********* Board: ESP32vn IoT UNO Web-Server dimmt LED #2 mit Schieberegler Einstellungen: https://arduino.esp8266.com/stable/package_esp8266com_index.json https://dl.espressif.com/dl/package_esp32_index.json http://dan.drown.org/stm32duino/package_STM32duino_index.json https://dl.espressif.com/dl/package_esp32_index.json *********/ // Import required libraries #include #include #include // Replace with your network credentials const char* ssid = "xxx"; const char* password = "xxx"; const int output = 2; String sliderValue = "0"; // setting PWM properties const int freq = 5000; const int ledChannel = 0; const int resolution = 8; const char* PARAM_INPUT = "value"; // Create AsyncWebServer object on port 80 AsyncWebServer server(80); const char index_html[] PROGMEM = R"rawliteral( KHF Web Server

KHF Web Server

LED GPIO2 dimmen

Dimmwert 0-255

%SLIDERVALUE%

)rawliteral"; // Replaces placeholder with button section in your web page String processor(const String& var){ //Serial.println(var); if (var == "SLIDERVALUE"){ return sliderValue; } return String(); } void setup(){ // Serial port for debugging purposes Serial.begin(115200); // configure LED PWM functionalitites ledcSetup(ledChannel, freq, resolution); // attach the channel to the GPIO to be controlled ledcAttachPin(output, ledChannel); ledcWrite(ledChannel, sliderValue.toInt()); // Connect to Wi-Fi WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(1000); Serial.println("Connecting to WiFi.."); } // Print ESP Local IP Address Serial.println(WiFi.localIP()); // Route for root / web page server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){ request->send_P(200, "text/html", index_html, processor); }); // Send a GET request to /slider?value= server.on("/slider", HTTP_GET, [] (AsyncWebServerRequest *request) { String inputMessage; // GET input1 value on /slider?value= if (request->hasParam(PARAM_INPUT)) { inputMessage = request->getParam(PARAM_INPUT)->value(); sliderValue = inputMessage; ledcWrite(ledChannel, sliderValue.toInt()); } else { inputMessage = "No message sent"; } Serial.println(inputMessage); request->send(200, "text/plain", "OK"); }); // Start server server.begin(); } void loop() { }