Our Arduino code:

 

#include <SoftwareSerial.h>
// XBee's DOUT (TX) is connected to pin 2 (Arduino's Software RX)
// XBee's DIN (RX) is connected to pin 3 (Arduino's Software TX)
SoftwareSerial XBee(2, 3); // RX, TX
bool closed = false;
void setup()
{
  // Set up both ports at 9600 baud. This value is most important
  // for the XBee. Make sure the baud rate matches the config
  // setting of your XBee.
  XBee.begin(9600);
  Serial.begin(9600);
  pinMode(13, OUTPUT);
}
void loop()
{
  if (XBee.available())
  { // If data comes in from XBee, send it out to serial monitor
    //char c = XBee.read();
    //Serial.write(c);
    if (XBee.read() != '0') {
      closed = true
    } else closed = false;
  }
  digitalWrite(13, closed ? HIGH : LOW);
}

 

Photos and great Starbuck for today!