118 lines
2.8 KiB
C++
Executable file
118 lines
2.8 KiB
C++
Executable file
/*
|
|
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
|
|
|
|
*/
|
|
|
|
#include <SPI.h>
|
|
#include <WiFi.h>
|
|
|
|
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");
|
|
}
|
|
|
|
|