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132 lines
3.4 KiB
C++
132 lines
3.4 KiB
C++
/*
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Repeating Wifi Web Client
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This sketch connects to a a web server and makes a request
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using an Arduino Wifi shield.
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Circuit:
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* WiFi shield attached to pins SPI pins and pin 7
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created 23 April 2012
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modified 31 May 2012
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by Tom Igoe
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modified 13 Jan 2014
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by Federico Vanzati
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http://www.arduino.cc/en/Tutorial/WifiWebClientRepeating
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This code is in the public domain.
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*/
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#include <SPI.h>
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#include <WiFi.h>
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char ssid[] = "yourNetwork"; // your network SSID (name)
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char pass[] = "secretPassword"; // your network password
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int keyIndex = 0; // your network key Index number (needed only for WEP)
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int status = WL_IDLE_STATUS;
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// Initialize the Wifi client library
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WiFiClient client;
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// server address:
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char server[] = "www.arduino.cc";
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//IPAddress server(64,131,82,241);
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unsigned long lastConnectionTime = 0; // last time you connected to the server, in milliseconds
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const unsigned long postingInterval = 10L * 1000L; // delay between updates, in milliseconds
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void setup() {
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//Initialize serial and wait for port to open:
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Serial.begin(9600);
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while (!Serial) {
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; // wait for serial port to connect. Needed for Leonardo only
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}
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// check for the presence of the shield:
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if (WiFi.status() == WL_NO_SHIELD) {
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Serial.println("WiFi shield not present");
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// don't continue:
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while (true);
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}
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String fv = WiFi.firmwareVersion();
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if (fv != "1.1.0") {
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Serial.println("Please upgrade the firmware");
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}
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// attempt to connect to Wifi network:
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while (status != WL_CONNECTED) {
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Serial.print("Attempting to connect to SSID: ");
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Serial.println(ssid);
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// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
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status = WiFi.begin(ssid, pass);
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// wait 10 seconds for connection:
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delay(10000);
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}
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// you're connected now, so print out the status:
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printWifiStatus();
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}
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void loop() {
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// if there's incoming data from the net connection.
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// send it out the serial port. This is for debugging
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// purposes only:
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while (client.available()) {
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char c = client.read();
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Serial.write(c);
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}
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// if ten seconds have passed since your last connection,
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// then connect again and send data:
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if (millis() - lastConnectionTime > postingInterval) {
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httpRequest();
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}
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}
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// this method makes a HTTP connection to the server:
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void httpRequest() {
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// close any connection before send a new request.
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// This will free the socket on the WiFi shield
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client.stop();
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// if there's a successful connection:
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if (client.connect(server, 80)) {
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Serial.println("connecting...");
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// send the HTTP PUT request:
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client.println("GET /latest.txt HTTP/1.1");
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client.println("Host: www.arduino.cc");
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client.println("User-Agent: ArduinoWiFi/1.1");
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client.println("Connection: close");
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client.println();
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// note the time that the connection was made:
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lastConnectionTime = millis();
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} else {
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// if you couldn't make a connection:
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Serial.println("connection failed");
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}
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}
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void printWifiStatus() {
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// print the SSID of the network you're attached to:
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Serial.print("SSID: ");
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Serial.println(WiFi.SSID());
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// print your WiFi shield's IP address:
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IPAddress ip = WiFi.localIP();
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Serial.print("IP Address: ");
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Serial.println(ip);
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// print the received signal strength:
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long rssi = WiFi.RSSI();
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Serial.print("signal strength (RSSI):");
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Serial.print(rssi);
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Serial.println(" dBm");
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}
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