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- #include <Arduino.h>
- #include <WiFi.h>
- // Replace with your network credentials
- const char* ssid = "********";
- const char* password = "**********";
- // Set web server port number to 80
- WiFiServer server(80);
- // Variable to store the HTTP request
- String header;
- // Current time
- unsigned long currentTime = millis();
- // Previous time
- unsigned long previousTime = 0;
- // Define timeout time in milliseconds (example: 2000ms = 2s)
- const long timeoutTime = 2000;
- void setup() {
- Serial.begin(9600);
- // 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,
- currentTime = millis();
- previousTime = currentTime;
- 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() && currentTime - previousTime <= timeoutTime) { // loop while the client's connected
- currentTime = millis();
- 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();
- client.println("<!DOCTYPE html>");
- client.println("<html lang=\"pt-br\">");
- client.println("<head>");
- client.println("<meta charset=\"UTF-8\">");
- client.println("<meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\">");
- client.println("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">");
- client.println("<title>Document</title>");
- client.println("</head>");
- client.println("<body>");
- client.println("Olá, mundo!<br/>");
- client.println("<a href=\"/dados.txt\" download=\"doc\">Clique Aqui para baixar o arquivo</a>");
- client.println("</body>");
- client.println("</html>");
- // 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("");
- }
- }
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