/* XRF Arduino Test Sketch - Beacon Client Relay
 *
 * Full details of this example: http://bit.ly/sPPN8a 
 * 
 * Simple sketch to test a pair of XRF modules are working. Listens
 * for the letter "H" (Hello) on the serial line, and sends the letter
 * "K" (OK) in response.
 * 
 * I'm using 2 x XRF modules and 2 x Xbee sheilds from Ciseco, and an
 * Arduino Uno and Arduino Ethernet. The default XRF baud rate in 9600.
 *
 * This sketch (2 of 2) is running on the Arduino Ethernet which
 * doesn't have a built in LED, so there's nothing for us to blink by
 * way of acknowledgement.
 *
 *  Created 4 Dec 2011
 *  by Mark Sweeting - www.sweeting.org/mark
 */
 
int XbeeEnable = 8;

void setup()
{
  pinMode(XbeeEnable, OUTPUT); 
  
  // Turn XRF on
  digitalWrite(XbeeEnable, HIGH);
  Serial.begin(9600); 
}

void loop()
{
  // listen out for the letter "H", and send a "K" if we get one.
  if(Serial.available() > 0)
  {
    if(Serial.read() == 'H')
    {
      Serial.print('K');
    }
  }
}