REDES OFFLINE | juancortes

// Este código mezcla un captive portal con el
// servidor asincrónico de ESP32 y el modulo
// SD para cargar archivos de forma nativa.
// Hasta el momento he probado .mp3 / .png como formatos
// de stream para sonido e imagen. Requiere un index.html
// que cargue los archivos
// importante descargar las librerias AsyncTCP.h y "ESPAsyncWebServer.h"

#include <DNSServer.h>
#include <WiFi.h>
#include <AsyncTCP.h>
#include "ESPAsyncWebServer.h"
#include "FS.h"
#include "SD.h"
#include "SPI.h"

DNSServer dnsServer;
AsyncWebServer server(80);

String user_name;
String proficiency;
bool name_received = false;
bool proficiency_received = false;

void initSDCard(){
if(!SD.begin()){
Serial.println("Card Mount Failed");
return;
}
uint8_t cardType = SD.cardType();

if(cardType == CARD_NONE){
Serial.println("No SD card attached");
return;
}

Serial.print("SD Card Type: ");
if(cardType == CARD_MMC){
Serial.println("MMC");
} else if(cardType == CARD_SD){
Serial.println("SDSC");
} else if(cardType == CARD_SDHC){
Serial.println("SDHC");
} else {
Serial.println("UNKNOWN");
}
uint64_t cardSize = SD.cardSize() / (1024 * 1024);
Serial.printf("SD Card Size: %lluMB\n", cardSize);
}

//const char index_html[] PROGMEM = R"rawliteral(
//<!DOCTYPE HTML><html><head>
// <title>Captive Portal Demo</title>
// <meta name="viewport" content="width=device-width, initial-scale=1">
// </head><body>
// <h3>Captive Portal Demo</h3>
// <br><br>
// <form action="/get">
// <br>
// Name: <input type="text" name="name">
// <br>
// ESP32 Proficiency:
// <select name = "proficiency">
// <option value=Beginner>Beginner</option>
// <option value=Advanced>Advanced</option>
// <option value=Pro>Pro</option>
// </select>
// <input type="submit" value="Submit">
// </form>
//</body></html>)rawliteral";

class CaptiveRequestHandler : public AsyncWebHandler {
public:
CaptiveRequestHandler() {}
virtual ~CaptiveRequestHandler() {}

bool canHandle(AsyncWebServerRequest *request){
//request->addInterestingHeader("ANY");
return true;
}

void handleRequest(AsyncWebServerRequest *request) {
request->send(SD, "/index.html", "text/html");
}
};

void setupServer(){
Serial.begin(115200);

server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
request->send(SD, "/index.html", "text/html");
Serial.println("Client Connected");
});

server.serveStatic("/", SD, "/");

server.begin();

}

void setup(){
//your other setup stuff.

Serial.begin(115200);
initSDCard();
Serial.println();
Serial.println("Setting up AP Mode");
WiFi.mode(WIFI_AP);
WiFi.softAP("esp-captive");
Serial.print("AP IP address: ");Serial.println(WiFi.softAPIP());
Serial.println("Setting up Async WebServer");
setupServer();
Serial.println("Starting DNS Server");
dnsServer.start(53, "*", WiFi.softAPIP());
server.addHandler(new CaptiveRequestHandler()).setFilter(ON_AP_FILTER);//only when requested from AP
//more handlers...
server.begin();
Serial.println("All Done!");
}

void loop(){

}