BasicHttpsClient.ino

/****************************************************************************************************************************
  BasicHttpsClient.ino - Simple Arduino web server sample for Ethernet shield

  For Ethernet shields using WT32_ETH01 (ESP32 + LAN8720)

  WebServer_WT32_ETH01 is a library for the Ethernet LAN8720 in WT32_ETH01 to run WebServer

  Based on and modified from ESP8266 https://github.com/esp8266/Arduino/releases
  Built by Khoi Hoang https://github.com/khoih-prog/WebServer_WT32_ETH01
  Licensed under MIT license
 *****************************************************************************************************************************/

#define DEBUG_ETHERNET_WEBSERVER_PORT       Serial

// Debug Level from 0 to 4
#define _ETHERNET_WEBSERVER_LOGLEVEL_       3

#include <WebServer_WT32_ETH01.h>
#include <HTTPClient.h>

#include <WiFiClientSecure.h>

// Select the IP address according to your local network
IPAddress myIP(192, 168, 2, 232);
IPAddress myGW(192, 168, 2, 1);
IPAddress mySN(255, 255, 255, 0);

// Google DNS Server IP
IPAddress myDNS(8, 8, 8, 8);

// This is GandiStandardSSLCA2.pem, the root Certificate Authority that signed
// the server certifcate for the demo server https://jigsaw.w3.org in this
// example. This certificate is valid until Sep 11 23:59:59 2024 GMT
const char* rootCACertificate =
  "-----BEGIN CERTIFICATE-----\n" \
  "MIIF6TCCA9GgAwIBAgIQBeTcO5Q4qzuFl8umoZhQ4zANBgkqhkiG9w0BAQwFADCB\n" \
  "iDELMAkGA1UEBhMCVVMxEzARBgNVBAgTCk5ldyBKZXJzZXkxFDASBgNVBAcTC0pl\n" \
  "cnNleSBDaXR5MR4wHAYDVQQKExVUaGUgVVNFUlRSVVNUIE5ldHdvcmsxLjAsBgNV\n" \
  "BAMTJVVTRVJUcnVzdCBSU0EgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwHhcNMTQw\n" \
  "OTEyMDAwMDAwWhcNMjQwOTExMjM1OTU5WjBfMQswCQYDVQQGEwJGUjEOMAwGA1UE\n" \
  "CBMFUGFyaXMxDjAMBgNVBAcTBVBhcmlzMQ4wDAYDVQQKEwVHYW5kaTEgMB4GA1UE\n" \
  "AxMXR2FuZGkgU3RhbmRhcmQgU1NMIENBIDIwggEiMA0GCSqGSIb3DQEBAQUAA4IB\n" \
  "DwAwggEKAoIBAQCUBC2meZV0/9UAPPWu2JSxKXzAjwsLibmCg5duNyj1ohrP0pIL\n" \
  "m6jTh5RzhBCf3DXLwi2SrCG5yzv8QMHBgyHwv/j2nPqcghDA0I5O5Q1MsJFckLSk\n" \
  "QFEW2uSEEi0FXKEfFxkkUap66uEHG4aNAXLy59SDIzme4OFMH2sio7QQZrDtgpbX\n" \
  "bmq08j+1QvzdirWrui0dOnWbMdw+naxb00ENbLAb9Tr1eeohovj0M1JLJC0epJmx\n" \
  "bUi8uBL+cnB89/sCdfSN3tbawKAyGlLfOGsuRTg/PwSWAP2h9KK71RfWJ3wbWFmV\n" \
  "XooS/ZyrgT5SKEhRhWvzkbKGPym1bgNi7tYFAgMBAAGjggF1MIIBcTAfBgNVHSME\n" \
  "GDAWgBRTeb9aqitKz1SA4dibwJ3ysgNmyzAdBgNVHQ4EFgQUs5Cn2MmvTs1hPJ98\n" \
  "rV1/Qf1pMOowDgYDVR0PAQH/BAQDAgGGMBIGA1UdEwEB/wQIMAYBAf8CAQAwHQYD\n" \
  "VR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMCIGA1UdIAQbMBkwDQYLKwYBBAGy\n" \
  "MQECAhowCAYGZ4EMAQIBMFAGA1UdHwRJMEcwRaBDoEGGP2h0dHA6Ly9jcmwudXNl\n" \
  "cnRydXN0LmNvbS9VU0VSVHJ1c3RSU0FDZXJ0aWZpY2F0aW9uQXV0aG9yaXR5LmNy\n" \
  "bDB2BggrBgEFBQcBAQRqMGgwPwYIKwYBBQUHMAKGM2h0dHA6Ly9jcnQudXNlcnRy\n" \
  "dXN0LmNvbS9VU0VSVHJ1c3RSU0FBZGRUcnVzdENBLmNydDAlBggrBgEFBQcwAYYZ\n" \
  "aHR0cDovL29jc3AudXNlcnRydXN0LmNvbTANBgkqhkiG9w0BAQwFAAOCAgEAWGf9\n" \
  "crJq13xhlhl+2UNG0SZ9yFP6ZrBrLafTqlb3OojQO3LJUP33WbKqaPWMcwO7lWUX\n" \
  "zi8c3ZgTopHJ7qFAbjyY1lzzsiI8Le4bpOHeICQW8owRc5E69vrOJAKHypPstLbI\n" \
  "FhfFcvwnQPYT/pOmnVHvPCvYd1ebjGU6NSU2t7WKY28HJ5OxYI2A25bUeo8tqxyI\n" \
  "yW5+1mUfr13KFj8oRtygNeX56eXVlogMT8a3d2dIhCe2H7Bo26y/d7CQuKLJHDJd\n" \
  "ArolQ4FCR7vY4Y8MDEZf7kYzawMUgtN+zY+vkNaOJH1AQrRqahfGlZfh8jjNp+20\n" \
  "J0CT33KpuMZmYzc4ZCIwojvxuch7yPspOqsactIGEk72gtQjbz7Dk+XYtsDe3CMW\n" \
  "1hMwt6CaDixVBgBwAc/qOR2A24j3pSC4W/0xJmmPLQphgzpHphNULB7j7UTKvGof\n" \
  "KA5R2d4On3XNDgOVyvnFqSot/kGkoUeuDcL5OWYzSlvhhChZbH2UF3bkRYKtcCD9\n" \
  "0m9jqNf6oDP6N8v3smWe2lBvP+Sn845dWDKXcCMu5/3EFZucJ48y7RetWIExKREa\n" \
  "m9T8bJUox04FB6b9HbwZ4ui3uRGKLXASUoWNjDNKD/yZkuBjcNqllEdjB+dYxzFf\n" \
  "BT02Vf6Dsuimrdfp5gJ0iHRc2jTbkNJtUQoj1iM=\n" \
  "-----END CERTIFICATE-----\n";

// Not sure if WiFiClientSecure checks the validity date of the certificate.
// Setting clock just to be sure...
void setClock()
{
  configTime(0, 0, "pool.ntp.org");

  Serial.print(F("Waiting for NTP time sync: "));
  time_t nowSecs = time(nullptr);

  while (nowSecs < 8 * 3600 * 2)
  {
    delay(500);
    Serial.print(F("."));
    yield();
    nowSecs = time(nullptr);
  }

  Serial.println();
  struct tm timeinfo;
  gmtime_r(&nowSecs, &timeinfo);
  Serial.print(F("Current time: "));
  Serial.print(asctime(&timeinfo));
}

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

  while (!Serial);

  // Using this if Serial debugging is not necessary or not using Serial port
  //while (!Serial && (millis() < 3000));

  Serial.print("\nStarting BasicHttpsClient on " + String(ARDUINO_BOARD));
  Serial.println(" with " + String(SHIELD_TYPE));
  Serial.println(WEBSERVER_WT32_ETH01_VERSION);

  // To be called before ETH.begin()
  WT32_ETH01_onEvent();

  //bool begin(uint8_t phy_addr=ETH_PHY_ADDR, int power=ETH_PHY_POWER, int mdc=ETH_PHY_MDC, int mdio=ETH_PHY_MDIO,
  //           eth_phy_type_t type=ETH_PHY_TYPE, eth_clock_mode_t clk_mode=ETH_CLK_MODE);
  //ETH.begin(ETH_PHY_ADDR, ETH_PHY_POWER, ETH_PHY_MDC, ETH_PHY_MDIO, ETH_PHY_TYPE, ETH_CLK_MODE);
  ETH.begin(ETH_PHY_ADDR, ETH_PHY_POWER);

  // Static IP, leave without this line to get IP via DHCP
  //bool config(IPAddress local_ip, IPAddress gateway, IPAddress subnet, IPAddress dns1 = 0, IPAddress dns2 = 0);
  ETH.config(myIP, myGW, mySN, myDNS);

  WT32_ETH01_waitForConnect();

  setClock();
}

void loop()
{
  if (WT32_ETH01_isConnected())
  {
    WiFiClientSecure *client = new WiFiClientSecure;

    if (client)
    {
      client -> setCACert(rootCACertificate);

      {
        // Add a scoping block for HTTPClient https to make sure it is destroyed before WiFiClientSecure *client is
        HTTPClient https;

        Serial.print("[HTTPS] begin...\n");

        if (https.begin(*client, "https://jigsaw.w3.org/HTTP/connection.html"))
        {
          // HTTPS
          Serial.print("[HTTPS] GET...\n");
          // start connection and send HTTP header
          int httpCode = https.GET();

          // httpCode will be negative on error
          if (httpCode > 0)
          {
            // HTTP header has been send and Server response header has been handled
            Serial.printf("[HTTPS] GET... code: %d\n", httpCode);

            // file found at server
            if (httpCode == HTTP_CODE_OK || httpCode == HTTP_CODE_MOVED_PERMANENTLY)
            {
              String payload = https.getString();
              Serial.println(payload);
            }
          }
          else
          {
            Serial.printf("[HTTPS] GET... failed, error: %s\n", https.errorToString(httpCode).c_str());
          }

          https.end();
        }
        else
        {
          Serial.printf("[HTTPS] Unable to connect\n");
        }

        // End extra scoping block
      }

      delete client;
    }
    else
    {
      Serial.println("Unable to create client");
    }

    Serial.println();
    Serial.println("Waiting 10s before the next round...");
    delay(10000);
  }
}