Receiving modules:

ATID DEAF //pan id
ATDL 1 //destination address
ATIR 14 // sample rate
ATIT 1 // number of samples
ATIU 0 // no serial out
ATMY (2-4)(different for each receiving module) // address
ATD13 // pin 1 digital in high ->sets pin one to read on xbee and sends a logic 1 when pin goes high
ATD23 // pin 2 digital in high
ATD33 // pin 3 digital in high

End receiving modules

Sending module:

ATID DEAF // pan id
ATMY1 //local address
ATIA (2-4) // sets who to send to
ATGT // guard time has to be lower than 100 milliseconds

End sending

End xbee stuff

Arduino code:
#define pin1 2 // in pins
#define pin2 3
#define pin3 4
#define pin4 5 // output
#define pin5 6
#define ledPin 13
#define outputPin 10
boolean s1 =0; // pin states
boolean s2 =0;
boolean s3 =0;
boolean s4 =0;
long prevmilles =0;
long prevmilles2=0;
long prevmilles3 =0;
long prevmilles4 =0;
int beat = 1;
int tone = 0;


void setup () {


pinMode(pin1, INPUT);
pinMode(pin2, INPUT);
pinMode(pin3, INPUT);
pinMode(pin4, OUTPUT);
// set pins to input and output appropriately
pinMode(ledPin, OUTPUT);
pinMode(outputPin, OUTPUT);

// start up the serial connection with 9600-8-n-1-true (non-inverted):
Serial.begin(9600);

// blink the status LED
blinkLED(ledPin, 3);

}

void loop () {

if (millis() - prevmilles >=500){
beat++;
if (beat > 4) beat = 1;
prevmilles = millis();
}
change();
//void buzz(int targetPin, long frequency, long length)
if (s1 || s2 || s3 ){
tone(pin4, tone, 150); // buzz the buzzer on pin 4 at 2500Hz for 1000 milliseconds
}

}

void change(){

if (millis() - prevmilles2 >=150){
// put the XBee in command mode
Serial.print("+++");
// delay(1100);



if (returnedOK() == 'T') {

switch(beat){// see who to look at

case 1 : Serial.print("ATIA2,CN");
break;
case 2 : Serial.print("ATIA3,CN");
break;
case 3 : Serial.print("ATIA4,CN");
break;
case 4 : Serial.print("ATIA5,CN");
break;

}

s1 = digitalRead(pin1);
s2 = digitalRead(pin2);
s3 = digitalRead(pin3);

if (s1) tone = 500;
if (s2) tone = 400;
if (s3) tone = 250;
if (s1 && s2) tone = 100;
if (s1 && s3) tone = 70;
if (s2 && s3) tone = 50;
if (s1 && s2 && s3) tone = 20;



// debug
// Serial.println(s1);
// Serial.println(s2);
// Serial.println(s3);
// Serial.println(s4);
Serial.flush();//flush all oks

}else{Serial.flush();
// Serial.println("hello");
}
prevmilles2 = millis();
}
}

void tone(int _pin, long freq, long time) {
long delayValue = 1000000/freq/2;
long numCycles = freq * time/ 1000;
for (long i=0; i < numCycles; i++){

if (millis() - prevmilles3 >=delayValue){
digitalWrite(_pin,HIGH);
}
if (millis() - prevmilles4 >=delayValue){
digitalWrite(_pin,LOW);
}

}
}

void blinkLED(int targetPin, int numBlinks) {
// this function blinks the status LED light as many times as requested
for (int i=0; i<numBlinks; i++) {
digitalWrite(outputPin, HIGH); // sets the LED on
delay(250); // waits for a second
digitalWrite(outputPin, LOW); // sets the LED off
delay(250);
}
}

//from rob faludis code
char returnedOK () {
// this function checks the response on the serial port to see if it was an "OK" or not
char incomingChar[3];
char okString[] = "OK";
char result = 'n';
long startTime = millis();
while (millis() - startTime < 500 && result == 'n') { // use a timeout of .5 seconds
if (Serial.available() > 1) {
// read three incoming bytes which should be "O", "K", and a linefeed:
for (int i=0; i<3; i++) {
incomingChar[i] = Serial.read();
}
if ( strstr(incomingChar, okString) != NULL ) { // check to see if the respose is "OK"
// if (incomingChar[0] == 'O' && incomingChar[1] == 'K') { // check to see if the first two characters are "OK"
result = 'T'; // return T if "OK" was the response
}
else {

result = 'F'; // otherwise return F
}
}
}
return result;

}