IP Configuration
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Gašper Dobrovoljc
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/*
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WiFi Web Server
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A simple web server that shows the value of the analog input pins.
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using a WiFi shield.
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This example is written to configure the WiFi settings using provisioning mode.
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It also sets up an mDNS server so the IP address of the board doesn't have to
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be obtained via the serial monitor.
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Circuit:
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WiFi shield attached
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Analog inputs attached to pins A0 through A5 (optional)
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created 13 July 2010
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by dlf (Metodo2 srl)
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modified 31 May 2012
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by Tom Igoe
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*/
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#include <SPI.h>
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#include <WiFi101.h>
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#include <WiFiMDNSResponder.h>
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const int ledPin = 6; // LED pin for connectivity status indicator
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char mdnsName[] = "wifi101"; // the MDNS name that the board will respond to
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// after WiFi settings have been provisioned
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// Note that the actual MDNS name will have '.local' after
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// the name above, so "wifi101" will be accessible on
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// the MDNS name "wifi101.local".
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WiFiServer server(80);
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// Create a MDNS responder to listen and respond to MDNS name requests.
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WiFiMDNSResponder mdnsResponder;
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void setup() {
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//Initialize serial:
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Serial.begin(9600);
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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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// configure the LED pin for output mode
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pinMode(ledPin, OUTPUT);
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// Start in provisioning mode:
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// 1) This will try to connect to a previously associated access point.
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// 2) If this fails, an access point named "wifi101-XXXX" will be created, where XXXX
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// is the last 4 digits of the boards MAC address. Once you are connected to the access point,
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// you can configure an SSID and password by visiting http://wifi101/
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WiFi.beginProvision();
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while (WiFi.status() != WL_CONNECTED) {
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// wait while not connected
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// blink the led to show an unconnected status
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digitalWrite(ledPin, HIGH);
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delay(500);
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digitalWrite(ledPin, LOW);
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delay(500);
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}
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// connected, make the LED stay on
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digitalWrite(ledPin, HIGH);
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server.begin();
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// Setup the MDNS responder to listen to the configured name.
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// NOTE: You _must_ call this _after_ connecting to the WiFi network and
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// being assigned an IP address.
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if (!mdnsResponder.begin(mdnsName)) {
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Serial.println("Failed to start MDNS responder!");
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while(1);
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}
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Serial.print("Server listening at http://");
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Serial.print(mdnsName);
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Serial.println(".local/");
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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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// Call the update() function on the MDNS responder every loop iteration to
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// make sure it can detect and respond to name requests.
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mdnsResponder.poll();
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// listen for incoming clients
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WiFiClient client = server.available();
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if (client) {
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Serial.println("new client");
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// an http request ends with a blank line
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boolean currentLineIsBlank = true;
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while (client.connected()) {
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if (client.available()) {
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char c = client.read();
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Serial.write(c);
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// if you've gotten to the end of the line (received a newline
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// character) and the line is blank, the http request has ended,
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// so you can send a reply
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if (c == '\n' && currentLineIsBlank) {
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// send a standard http response header
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client.println("HTTP/1.1 200 OK");
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client.println("Content-Type: text/html");
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client.println("Connection: close"); // the connection will be closed after completion of the response
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client.println("Refresh: 5"); // refresh the page automatically every 5 sec
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client.println();
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client.println("<!DOCTYPE HTML>");
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client.println("<html>");
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// output the value of each analog input pin
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for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
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int sensorReading = analogRead(analogChannel);
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client.print("analog input ");
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client.print(analogChannel);
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client.print(" is ");
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client.print(sensorReading);
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client.println("<br />");
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}
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client.println("</html>");
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break;
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}
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if (c == '\n') {
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// you're starting a new line
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currentLineIsBlank = true;
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}
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else if (c != '\r') {
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// you've gotten a character on the current line
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currentLineIsBlank = false;
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}
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}
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}
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// give the web browser time to receive the data
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delay(1);
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// close the connection:
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client.stop();
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Serial.println("client disonnected");
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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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