main.cpp

#include <Arduino.h>
#include <WiFi.h>
#include <ESPAsyncWebServer.h>
#include <SPIFFS.h>

String v[2];
AsyncWebServer server(80);
const char* ssid;
const char* password;
 
void setup() {  
  Serial.begin(115200);
  delay(1000);
     
  if (!SPIFFS.begin(true)) {
    Serial.println("An Error has occurred while mounting SPIFFS");
    return;
  }
    //--- Read file
    File inputs = SPIFFS.open("/inputs.txt"); 
    if(!inputs){
        Serial.println("Failed to open file for reading");
        return;
    } 
    Serial.println("File Content: ");

    int i = 0;
    while(inputs.available()){
        String line= inputs.readStringUntil('\n');        
        v[i] = line;
        i++;        
        String string2 = String("Linia ") + i + ": " + line;
        Serial.println(string2);             
    }
 
    inputs.close();
    
    for(i = 0; i<2; i++) {
        Serial.println(v[i]);
      }

  WiFi.begin(v[0].c_str(),v[1].c_str());  

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.println("Connecting to WiFi..");
  }
  Serial.println((String)"Connected to " + v[0] + " with IP addres: " + WiFi.localIP().toString());
  
  //--- Check if files exist inside the Flash Memory
  Serial.println(SPIFFS.exists("/inputs.txt"));
  Serial.println(SPIFFS.exists("/back-image.jpg"));
  Serial.println(SPIFFS.exists("/index.html"));
  Serial.println(SPIFFS.exists("/index2.html"));
  Serial.println(SPIFFS.exists("/login.css"));
  Serial.println(SPIFFS.exists("/logo.png"));

  server.on("/url", HTTP_GET, [](AsyncWebServerRequest *request){
    request->send(SPIFFS, "/index2.html", "text/html");
  });
  server.on("/login", HTTP_GET, [](AsyncWebServerRequest *request){
    request->send(SPIFFS, "/index.html", "text/html");
  });
  server.on("/login.css", HTTP_GET, [](AsyncWebServerRequest *request) {
      request->send(SPIFFS, "/login.css", "text/css");
  });
  server.on("/back-image.jpg", HTTP_GET, [](AsyncWebServerRequest *request) {
      request->send(SPIFFS, "/back-image.jpg", "image/jpeg");
  });
  server.on("/logo.png", HTTP_GET, [](AsyncWebServerRequest *request) {
      request->send(SPIFFS, "/logo.png", "image/png");
  });

  server.on("/login", HTTP_POST, [](AsyncWebServerRequest *request) {
  if (!request->hasParam("networkName", true) || !request->hasParam("networkPassword", true)) {
    request->send(400, "Missing fields");
    return;
  }
  const char *networkName = request->getParam("networkName")->value().c_str();
  const char *networkPassword = request->getParam("networkPassword")->value().c_str();
  // Do stuff with networkName and networkPassword
  ssid = networkName;
  password = networkPassword;
  Serial.println(ssid);
  Serial.println(password); 

  // Redirect to new page
  request->redirect("/url");
  });

  server.begin();

  Serial.println(ssid);
  Serial.println(password);  

}

void loop() {}