/*|----------------------------------------------------------|*/
/*|WORKING EXAMPLE FOR HTTP/HTTPS CONNECTION                 |*/
/*|TESTED BOARDS: Devkit v1 DOIT, Devkitc v4                 |*/
/*|CORE: June 2018                                           |*/
/*|----------------------------------------------------------|*/
#include <WiFi.h>
#include <HTTPClient.h>
#if __has_include ("esp_eap_client.h")
#include "esp_eap_client.h"
#else
#include "esp_wpa2.h"
#endif
#include <Wire.h>
#define EAP_IDENTITY "identity" //if connecting from another corporation, use identity@organisation.domain in Eduroam 
#define EAP_PASSWORD "password" //your Eduroam password
const char* ssid = "eduroam"; // Eduroam SSID
int counter = 0;
const char* test_root_ca= \
"-----BEGIN CERTIFICATE-----\n" \
"MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBh\n" \
"MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3\n" \
"d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBD\n" \
"QTAeFw0wNjExMTAwMDAwMDBaFw0zMTExMTAwMDAwMDBaMGExCzAJBgNVBAYTAlVT\n" \
"MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5j\n" \
"b20xIDAeBgNVBAMTF0RpZ2lDZXJ0IEdsb2JhbCBSb290IENBMIIBIjANBgkqhkiG\n" \
"9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4jvhEXLeqKTTo1eqUKKPC3eQyaKl7hLOllsB\n" \
"CSDMAZOnTjC3U/dDxGkAV53ijSLdhwZAAIEJzs4bg7/fzTtxRuLWZscFs3YnFo97\n" \
"nh6Vfe63SKMI2tavegw5BmV/Sl0fvBf4q77uKNd0f3p4mVmFaG5cIzJLv07A6Fpt\n" \
"43C/dxC//AH2hdmoRBBYMql1GNXRor5H4idq9Joz+EkIYIvUX7Q6hL+hqkpMfT7P\n" \
"T19sdl6gSzeRntwi5m3OFBqOasv+zbMUZBfHWymeMr/y7vrTC0LUq7dBMtoM1O/4\n" \
"gdW7jVg/tRvoSSiicNoxBN33shbyTApOB6jtSj1etX+jkMOvJwIDAQABo2MwYTAO\n" \
"BgNVHQ8BAf8EBAMCAYYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUA95QNVbR\n" \
"TLtm8KPiGxvDl7I90VUwHwYDVR0jBBgwFoAUA95QNVbRTLtm8KPiGxvDl7I90VUw\n" \
"DQYJKoZIhvcNAQEFBQADggEBAMucN6pIExIK+t1EnE9SsPTfrgT1eXkIoyQY/Esr\n" \
"hMAtudXH/vTBH1jLuG2cenTnmCmrEbXjcKChzUyImZOMkXDiqw8cvpOp/2PV5Adg\n" \
"06O/nVsJ8dWO41P0jmP6P6fbtGbfYmbW0W5BjfIttep3Sp+dWOIrWcBAI+0tKIJF\n" \
"PnlUkiaY4IBIqDfv8NZ5YBberOgOzW6sRBc4L0na4UU+Krk2U886UAb3LujEV0ls\n" \
"YSEY1QSteDwsOoBrp+uvFRTp2InBuThs4pFsiv9kuXclVzDAGySj4dzp30d8tbQk\n" \
"CAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4=\n" \
"-----END CERTIFICATE-----\n";
void setup() {
  Serial.begin(115200);
  delay(10);
  Serial.println();
  Serial.print("Connecting to network: ");
  Serial.println(ssid);
  WiFi.disconnect(true);  //disconnect form wifi to set new wifi connection
  WiFi.mode(WIFI_STA); //init wifi mode
#if __has_include ("esp_eap_client.h")
  esp_eap_client_set_identity((uint8_t *)EAP_IDENTITY, strlen(EAP_IDENTITY)); //provide identity
  esp_eap_client_set_username((uint8_t *)EAP_IDENTITY, strlen(EAP_IDENTITY)); //provide username
  esp_eap_client_set_password((uint8_t *)EAP_PASSWORD, strlen(EAP_PASSWORD)); //provide password
  esp_wifi_sta_enterprise_enable();
#else
  esp_wifi_sta_wpa2_ent_set_identity((uint8_t *)EAP_IDENTITY, strlen(EAP_IDENTITY)); //provide identity
  esp_wifi_sta_wpa2_ent_set_username((uint8_t *)EAP_IDENTITY, strlen(EAP_IDENTITY)); //provide username --> identity and username is same
  esp_wifi_sta_wpa2_ent_set_password((uint8_t *)EAP_PASSWORD, strlen(EAP_PASSWORD)); //provide password
  esp_wifi_sta_wpa2_ent_enable();
#endif
  WiFi.begin(ssid); //connect to wifi
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
    counter++;
    if(counter>=60){ //after 30 seconds timeout - reset board
      ESP.restart();
    }
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address set: "); 
  Serial.println(WiFi.localIP()); //print LAN IP
}
void loop() {
  if (WiFi.status() == WL_CONNECTED) { //if we are connected to Eduroam network
    counter = 0; //reset counter
    Serial.println("Wifi is still connected with IP: "); 
    Serial.println(WiFi.localIP());   //inform user about his IP address
  }else if (WiFi.status() != WL_CONNECTED) { //if we lost connection, retry
    WiFi.begin(ssid);      
  }
  while (WiFi.status() != WL_CONNECTED) { //during lost connection, print dots
    delay(500);
    Serial.print(".");
    counter++;
    if(counter>=60){ //30 seconds timeout - reset board
    ESP.restart();
    }
  }
  Serial.print("Connecting to website: ");
    HTTPClient http;
    http.begin("https://arduino.php5.sk/rele/rele1.txt", test_root_ca); //HTTPS example connection
    //http.begin("http://www.arduino.php5.sk/rele/rele1.txt"); //HTTP example connection
    //if uncomment HTTP example, you can comment root CA certificate too!
    int httpCode = http.GET();
    if(httpCode > 0) {
      Serial.printf("[HTTP] GET... code: %d\n", httpCode);
      //file found at server --> on unsucessful connection code will be -1
      if(httpCode == HTTP_CODE_OK) {
        String payload = http.getString();
        Serial.println(payload);
      }
     }else{
      Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
      }
  http.end();  
  delay(2000);
}
