#include <WiFi.h>
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#include <DNSServer.h>
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const byte DNS_PORT = 53;
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IPAddress apIP(192, 168, 1, 1);
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DNSServer dnsServer;
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WiFiServer server(80);
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String responseHTML = ""
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"<!DOCTYPE html><html><head><title>CaptivePortal</title></head><body>"
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"<h1>Hello World!</h1><p>This is a captive portal example. All requests will "
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"be redirected here.</p></body></html>";
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void setup() {
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WiFi.mode(WIFI_AP);
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WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0));
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WiFi.softAP("DNSServer CaptivePortal example");
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// if DNSServer is started with "*" for domain name, it will reply with
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// provided IP to all DNS request
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dnsServer.start(DNS_PORT, "*", apIP);
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server.begin();
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}
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void loop() {
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dnsServer.processNextRequest();
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WiFiClient client = server.available(); // listen for incoming clients
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if (client) {
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String currentLine = "";
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while (client.connected()) {
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if (client.available()) {
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char c = client.read();
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if (c == '\n') {
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if (currentLine.length() == 0) {
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client.println("HTTP/1.1 200 OK");
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client.println("Content-type:text/html");
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client.println();
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client.print(responseHTML);
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break;
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} else {
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currentLine = "";
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}
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} else if (c != '\r') {
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currentLine += c;
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}
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}
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}
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client.stop();
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}
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}
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