HTTPSTest.ino

/*
 *  HTTP over TLS (HTTPS) example sketch
 *
 *  This example demonstrates how to use
 *  WiFiClientSecure class to access HTTPS API.
 *  We fetch and display the status of
 *  esp8266/Arduino project continous integration
 *  build.
 *
 *  Created by Ivan Grokhotkov, 2015.
 *  This example is in public domain.
 */

#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>
#include <time.h>

const char* ssid = "            ";
const char* password = "              ";

const char* host = "api.github.com";
const int httpsPort = 443;

// Use web browser to view and copy
// SHA1 fingerprint of the certificate
const char* fingerprint = "CF 05 98 89 CA FF 8E D8 5E 5C E0 C2 E4 F7 E6 C3 C7 50 DD 5C";

void setup() {
  Serial.begin(115200);
  Serial.println();
  Serial.print("connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  configTime(3600, 0, "pool.ntp.org");
}

void loop() {
  // Use WiFiClientSecure class to create TLS connection
  WiFiClientSecure client;
  if (!client.connect(host, httpsPort)) {
    Serial.println("connection failed");
    return;
  }


  String url = "/repos/esp8266/Arduino/commits/esp8266/status";

  client.print(String("GET ") + url + " HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" +
               "User-Agent: BuildFailureDetectorESP8266\r\n" +
               "Connection: close\r\n\r\n");

//  Serial.println("waiting for connection to close");
  while (client.connected() || client.available()) {
    client.read();
  }
  time_t t = time(nullptr);
  Serial.printf("time: %s\tHeap: %d\n", ctime(&t), ESP.getFreeHeap());
  delay(5000);
}