// Load Wi-Fi library #include // Replace with your network credentials const char* ssid = "xxxxx"; const char* password = "xxxxx"; // Set web server port number to 80 WiFiServer server(80); // Variable to store the HTTP request String header; // Auxiliar variables to store the current output state String output5State = "vypnuto"; String output4State = "vypnuto"; String output3State = "vypnuto"; String output6State = "vypnuto"; // Assign output variables to GPIO pins const int output5 = D5; const int output4 = D4; const int output3 = D3; const int output6 = D6; void setup() { Serial.begin(115200); // Initialize the output variables as outputs pinMode(output5, OUTPUT); pinMode(output4, OUTPUT); pinMode(output3, OUTPUT); pinMode(output6, OUTPUT); // Set outputs to LOW digitalWrite(output5, LOW); digitalWrite(output4, LOW); digitalWrite(output3, LOW); digitalWrite(output6, LOW); // Connect to Wi-Fi network with SSID and password Serial.print("Connecting to "); Serial.println(ssid); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } // Print local IP address and start web server Serial.println(""); Serial.println("WiFi connected."); Serial.println("IP address: "); Serial.println(WiFi.localIP()); server.begin(); } void loop(){ WiFiClient client = server.available(); // Listen for incoming clients if (client) { // If a new client connects, Serial.println("New Client."); // print a message out in the serial port String currentLine = ""; // make a String to hold incoming data from the client while (client.connected()) { // loop while the client's connected if (client.available()) { // if there's bytes to read from the client, char c = client.read(); // read a byte, then Serial.write(c); // print it out the serial monitor header += c; if (c == '\n') { // if the byte is a newline character // if the current line is blank, you got two newline characters in a row. // that's the end of the client HTTP request, so send a response: if (currentLine.length() == 0) { // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK) // and a content-type so the client knows what's coming, then a blank line: client.println("HTTP/1.1 200 OK"); client.println("Content-type:text/html"); client.println("Connection: close"); client.println(); // turns the GPIOs on and off if (header.indexOf("GET /5/on") >= 0) { Serial.println("GPIO 5 on"); output5State = "zapnuto"; digitalWrite(output5, HIGH); } else if (header.indexOf("GET /5/off") >= 0) { Serial.println("GPIO 5 off"); output5State = "vypnuto"; digitalWrite(output5, LOW); } else if (header.indexOf("GET /4/on") >= 0) { Serial.println("GPIO 4 on"); output4State = "zapnuto"; digitalWrite(output4, HIGH); } else if (header.indexOf("GET /4/off") >= 0) { Serial.println("GPIO 4 off"); output4State = "vypnuto"; digitalWrite(output4, LOW); } else if (header.indexOf("GET /3/on") >= 0) { Serial.println("GPIO 3 on"); output3State = "zapnuto"; digitalWrite(output3, HIGH); } else if (header.indexOf("GET /3/off") >= 0) { Serial.println("GPIO 3 off"); output3State = "vypnuto"; digitalWrite(output3, LOW); } else if (header.indexOf("GET /6/on") >= 0) { Serial.println("GPIO 6 on"); output6State = "zapnuto"; digitalWrite(output6, HIGH); } else if (header.indexOf("GET /6/off") >= 0) { Serial.println("GPIO 6 off"); output6State = "vypnuto"; digitalWrite(output6, LOW); } // Display the HTML web page client.println(""); client.println(""); client.println(""); // CSS to style the on/off buttons // Feel free to change the background-color and font-size attributes to fit your preferences client.println(""); // Web Page Heading client.println("

ESP8266 4 relay

"); // Display current state, and ON/OFF buttons for GPIO 3 client.println("

GPIO 3 - " + output3State + " - "); // If the output3State is off, it displays the ON button if (output3State=="vypnuto") { client.println("

"); } else { client.println("

"); } // Display current state, and ON/OFF buttons for GPIO 4 client.println("

GPIO 4 - " + output4State + " - "); // If the output4State is off, it displays the ON button if (output4State=="vypnuto") { client.println("

"); } else { client.println("

"); } // Display current state, and ON/OFF buttons for GPIO 5 client.println("

GPIO 5 - " + output5State + " - "); // If the output5State is off, it displays the ON button if (output5State=="vypnuto") { client.println("

"); } else { client.println("

"); } // Display current state, and ON/OFF buttons for GPIO 6 client.println("

GPIO 6 - " + output6State + " - "); // If the output6State is off, it displays the ON button if (output6State=="vypnuto") { client.println("

"); } else { client.println("

"); } client.println(""); // The HTTP response ends with another blank line client.println(); // Break out of the while loop break; } else { // if you got a newline, then clear currentLine currentLine = ""; } } else if (c != '\r') { // if you got anything else but a carriage return character, currentLine += c; // add it to the end of the currentLine } } } // Clear the header variable header = ""; // Close the connection client.stop(); Serial.println("Client disconnected."); Serial.println(""); } }