WiFi Web Client Repeating

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1/*
2
3  Repeating Wifi Web Client
4
5 This sketch connects to a a web server and makes a request
6
7 using an Arduino Wifi shield.
8
9 Circuit:
10
11 * WiFi shield attached to pins SPI pins and pin 7
12
13 created 23 April 2012
14
15 modified 31 May 2012
16
17 by Tom Igoe
18
19 modified 13 Jan 2014
20
21 by Federico Vanzati
22
23 https://docs.arduino.cc/library-examples/wifi-library/WiFiWebClientRepeating
24
25 This code is in the public domain.
26
27 */
28
29#include <SPI.h>
30#include <WiFi.h>
31
32char ssid[] = "yourNetwork";      //  your network SSID (name)
33char pass[] = "secretPassword";   // your network password
34int keyIndex = 0;            // your network key Index number (needed only for WEP)
35
36int status = WL_IDLE_STATUS;
37
38// Initialize the Wifi client library
39
40WiFiClient client;
41
42// server address:
43char server[] = "www.arduino.cc";
44//IPAddress server(64,131,82,241);
45
46unsigned long lastConnectionTime = 0;            // last time you connected to the server, in milliseconds
47
48const unsigned long postingInterval = 10L * 1000L; // delay between updates, in milliseconds
49
50void setup() {
51
52  //Initialize serial and wait for port to open:
53
54  Serial.begin(9600);
55
56  while (!Serial) {
57
58    ; // wait for serial port to connect. Needed for native USB port only
59
60  }
61
62  // check for the presence of the shield:
63
64  if (WiFi.status() == WL_NO_SHIELD) {
65
66    Serial.println("WiFi shield not present");
67
68    // don't continue:
69
70    while (true);
71
72  }
73
74  String fv = WiFi.firmwareVersion();
75
76  if (fv != "1.1.0") {
77
78    Serial.println("Please upgrade the firmware");
79
80  }
81
82  // attempt to connect to Wifi network:
83
84  while (status != WL_CONNECTED) {
85
86    Serial.print("Attempting to connect to SSID: ");
87
88    Serial.println(ssid);
89
90    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
91
92    status = WiFi.begin(ssid, pass);
93
94    // wait 10 seconds for connection:
95
96    delay(10000);
97
98  }
99
100  // you're connected now, so print out the status:
101
102  printWifiStatus();
103}
104
105void loop() {
106
107  // if there's incoming data from the net connection.
108
109  // send it out the serial port.  This is for debugging
110
111  // purposes only:
112
113  while (client.available()) {
114
115    char c = client.read();
116
117    Serial.write(c);
118
119  }
120
121  // if ten seconds have passed since your last connection,
122
123  // then connect again and send data:
124
125  if (millis() - lastConnectionTime > postingInterval) {
126
127    httpRequest();
128
129  }
130
131}
132
133// this method makes a HTTP connection to the server:
134void httpRequest() {
135
136  // close any connection before send a new request.
137
138  // This will free the socket on the WiFi shield
139
140  client.stop();
141
142  // if there's a successful connection:
143
144  if (client.connect(server, 80)) {
145
146    Serial.println("connecting...");
147
148    // send the HTTP PUT request:
149
150    client.println("GET /latest.txt HTTP/1.1");
151
152    client.println("Host: www.arduino.cc");
153
154    client.println("User-Agent: ArduinoWiFi/1.1");
155
156    client.println("Connection: close");
157
158    client.println();
159
160    // note the time that the connection was made:
161
162    lastConnectionTime = millis();
163
164  } else {
165
166    // if you couldn't make a connection:
167
168    Serial.println("connection failed");
169
170  }
171}
172
173void printWifiStatus() {
174
175  // print the SSID of the network you're attached to:
176
177  Serial.print("SSID: ");
178
179  Serial.println(WiFi.SSID());
180
181  // print your WiFi shield's IP address:
182
183  IPAddress ip = WiFi.localIP();
184
185  Serial.print("IP Address: ");
186
187  Serial.println(ip);
188
189  // print the received signal strength:
190
191  long rssi = WiFi.RSSI();
192
193  Serial.print("signal strength (RSSI):");
194
195  Serial.print(rssi);
196
197  Serial.println(" dBm");
198}