1  // SPDX-FileCopyrightText: 2015 Arturo Guadalupi
  2  // SPDX-FileCopyrightText: 2020 Brent Rubell for Adafruit Industries
  3  //
  4  // SPDX-License-Identifier: MIT
  5  
  6  /*
  7  This example creates a client object that connects and transfers
  8  data using always SSL.
  9  
 10  It is compatible with the methods normally related to plain
 11  connections, like client.connect(host, port).
 12  
 13  Written by Arturo Guadalupi
 14  last revision November 2015
 15  
 16  */
 17  
 18  #include <WiFiClientSecure.h>
 19  
 20  // Enter your WiFi SSID and password
 21  char ssid[] = "YOUR_SSID";             // your network SSID (name)
 22  char pass[] = "YOUR_SSID_PASSWORD";    // your network password (use for WPA, or use as key for WEP)
 23  int keyIndex = 0;                      // your network key Index number (needed only for WEP)
 24  
 25  int status = WL_IDLE_STATUS;
 26  // if you don't want to use DNS (and reduce your sketch size)
 27  // use the numeric IP instead of the name for the server:
 28  //IPAddress server(74,125,232,128);  // numeric IP for Google (no DNS)
 29  
 30  #define SERVER "cdn.syndication.twimg.com"
 31  #define PATH   "/widgets/followbutton/info.json?screen_names=adafruit"
 32  
 33  // Initialize the SSL client library
 34  // with the IP address and port of the server
 35  // that you want to connect to (port 443 is default for HTTPS):
 36  WiFiClientSecure client;
 37  
 38  void setup() {
 39    //Initialize serial and wait for port to open:
 40    Serial.begin(115200);
 41    while (!Serial) {
 42      ; // wait for serial port to connect. Needed for native USB port only
 43    }
 44  
 45    // attempt to connect to Wifi network:
 46    Serial.print("Attempting to connect to SSID: ");
 47    Serial.println(ssid);
 48  
 49    WiFi.begin(ssid, pass);
 50    while (WiFi.status() != WL_CONNECTED) {
 51        delay(500);
 52        Serial.print(".");
 53    }
 54  
 55    Serial.println("");
 56    Serial.println("Connected to WiFi");
 57    printWifiStatus();
 58  
 59    client.setInsecure(); // don't use a root cert
 60  
 61    Serial.println("\nStarting connection to server...");
 62    // if you get a connection, report back via serial:
 63    if (client.connect(SERVER, 443)) {
 64      Serial.println("connected to server");
 65      // Make a HTTP request:
 66      client.println("GET " PATH " HTTP/1.1");
 67      client.println("Host: " SERVER);
 68      client.println("Connection: close");
 69      client.println();
 70    }
 71  }
 72  
 73  uint32_t bytes = 0;
 74  
 75  void loop() {
 76    // if there are incoming bytes available
 77    // from the server, read them and print them:
 78    while (client.available()) {
 79      char c = client.read();
 80      Serial.write(c);
 81      bytes++;
 82    }
 83  
 84    // if the server's disconnected, stop the client:
 85    if (!client.connected()) {
 86      Serial.println();
 87      Serial.println("disconnecting from server.");
 88      client.stop();
 89      Serial.print("Read "); Serial.print(bytes); Serial.println(" bytes");
 90  
 91      // do nothing forevermore:
 92      while (true);
 93    }
 94  }
 95  
 96  
 97  void printWifiStatus() {
 98    // print the SSID of the network you're attached to:
 99    Serial.print("SSID: ");
100    Serial.println(WiFi.SSID());
101  
102    // print your board's IP address:
103    IPAddress ip = WiFi.localIP();
104    Serial.print("IP Address: ");
105    Serial.println(ip);
106  
107    // print the received signal strength:
108    long rssi = WiFi.RSSI();
109    Serial.print("signal strength (RSSI):");
110    Serial.print(rssi);
111    Serial.println(" dBm");
112  }