source: rtos_arduino/trunk/arduino_lib/libraries/Bridge/examples/SpacebrewYun/spacebrewString/spacebrewString.ino@ 136

/*
  Spacebrew String
 
 Demonstrates how to create a sketch that sends and receives strings
 to and from Spacebrew. Every time string data is received it 
 is output to the Serial monitor.

 Make sure that your Y炭n is connected to the internet for this example
 to function properly.
 
 The circuit:
 - No circuit required
 
 created 2013
 by Julio Terra
 
 This example code is in the public domain.
 
 More information about Spacebrew is available at: 
 http://spacebrew.cc/
 
 */

#include <Bridge.h>
#include <SpacebrewYun.h>

// create a variable of type SpacebrewYun and initialize it with the constructor
SpacebrewYun sb = SpacebrewYun("spacebrewYun Strings", "String sender and receiver");

// create variables to manage interval between each time we send a string
long last_time = 0;
int interval = 2000;

void setup() { 

        // start the serial port
        Serial.begin(57600);

        // for debugging, wait until a serial console is connected
        delay(4000);
        while (!Serial) { ; }

        // start-up the bridge
        Bridge.begin();

        // configure the spacebrew object to print status messages to serial
        sb.verbose(true);

        // configure the spacebrew publisher and subscriber
        sb.addPublish("speak", "string");
        sb.addSubscribe("listen", "string");

        // register the string message handler method 
        sb.onStringMessage(handleString);

        // connect to cloud spacebrew server at "sandbox.spacebrew.cc"
        sb.connect("sandbox.spacebrew.cc"); 
} 


void loop() { 
        // monitor spacebrew connection for new data
        sb.monitor();

        // connected to spacebrew then send a string every 2 seconds
        if ( sb.connected() ) {

                // check if it is time to send a new message
                if ( (millis() - last_time) > interval ) {
                        sb.send("speak", "is anybody out there?");
                        last_time = millis();
                }
        }
} 

// handler method that is called whenever a new string message is received 
void handleString (String route, String value) {
        // print the message that was received
        Serial.print("From ");
        Serial.print(route);
        Serial.print(", received msg: ");
        Serial.println(value);
}