| /* | |
| Chat Server | |
| A simple server that distributes any incoming messages to all | |
| connected clients. To use telnet to your device's IP address and type. | |
| You can see the client's input in the serial monitor as well. | |
| This example is written for a network using WPA encryption. For | |
| WEP or WPA, change the Wifi.begin() call accordingly. | |
| Circuit: | |
| * WiFi shield attached | |
| created 18 Dec 2009 | |
| by David A. Mellis | |
| modified 31 May 2012 | |
| by Tom Igoe | |
| */ | |
| char ssid[] = "yourNetwork"; // your network SSID (name) | |
| char pass[] = "secretPassword"; // your network password (use for WPA, or use as key for WEP) | |
| int keyIndex = 0; // your network key Index number (needed only for WEP) | |
| int status = WL_IDLE_STATUS; | |
| WiFiServer server(23); | |
| boolean alreadyConnected = false; // whether or not the client was connected previously | |
| void setup() { | |
| //Initialize serial and wait for port to open: | |
| Serial.begin(9600); | |
| while (!Serial) { | |
| ; // wait for serial port to connect. Needed for native USB port only | |
| } | |
| // check for the presence of the shield: | |
| if (WiFi.status() == WL_NO_SHIELD) { | |
| Serial.println("WiFi shield not present"); | |
| // don't continue: | |
| while (true); | |
| } | |
| String fv = WiFi.firmwareVersion(); | |
| if (fv != "1.1.0") { | |
| Serial.println("Please upgrade the firmware"); | |
| } | |
| // attempt to connect to Wifi network: | |
| while (status != WL_CONNECTED) { | |
| Serial.print("Attempting to connect to SSID: "); | |
| Serial.println(ssid); | |
| // Connect to WPA/WPA2 network. Change this line if using open or WEP network: | |
| status = WiFi.begin(ssid, pass); | |
| // wait 10 seconds for connection: | |
| delay(10000); | |
| } | |
| // start the server: | |
| server.begin(); | |
| // you're connected now, so print out the status: | |
| printWifiStatus(); | |
| } | |
| void loop() { | |
| // wait for a new client: | |
| WiFiClient client = server.available(); | |
| // when the client sends the first byte, say hello: | |
| if (client) { | |
| if (!alreadyConnected) { | |
| // clead out the input buffer: | |
| client.flush(); | |
| Serial.println("We have a new client"); | |
| client.println("Hello, client!"); | |
| alreadyConnected = true; | |
| } | |
| if (client.available() > 0) { | |
| // read the bytes incoming from the client: | |
| char thisChar = client.read(); | |
| // echo the bytes back to the client: | |
| server.write(thisChar); | |
| // echo the bytes to the server as well: | |
| Serial.write(thisChar); | |
| } | |
| } | |
| } | |
| void printWifiStatus() { | |
| // print the SSID of the network you're attached to: | |
| Serial.print("SSID: "); | |
| Serial.println(WiFi.SSID()); | |
| // print your WiFi shield's IP address: | |
| IPAddress ip = WiFi.localIP(); | |
| Serial.print("IP Address: "); | |
| Serial.println(ip); | |
| // print the received signal strength: | |
| long rssi = WiFi.RSSI(); | |
| Serial.print("signal strength (RSSI):"); | |
| Serial.print(rssi); | |
| Serial.println(" dBm"); | |
| } | |