DISSERTATION COORDINATOR XBEE PART

#include <CmdMessenger.h>

// Mustnt conflict / collide with our message payload data. Fine if we use base64 library ^^ above
char field_separator = '-';
char command_separator = ';';

// Attach a new CmdMessenger object to the default Serial port
CmdMessenger cmdMessenger = CmdMessenger(Serial, field_separator, command_separator);

String messageReceived;
int led = 13;
int intervalCoordinatorCheck = 5000;
 
enum
{
  kACK              = 1,
  kDATAREQUEST      = 2,
  kDATAANSWER       = 3,
  kNOTIFYAWAKE      = 5,
  kSEND_CMDS_END,
};


 // ------------------ C A L L B A C K  M E T H O D S -------------------------
 void DataCallback()
{
  alert();
  cmdMessenger.sendCmd(kACK, "Data received on coordinator");
  delay(100);
   while ( cmdMessenger.available() )
  {
    char buf[350] = { '\0' };
    cmdMessenger.copyString(buf, 350);
    if(buf[0])
    {
      messageReceived = buf;
      Serial.println(messageReceived);
      delay(100);
    }
  }
}

 void AwakeRequestCallback()
{
  cmdMessenger.sendCmd(kACK, "Nodes awaked");
  cmdMessenger.sendCmd(kDATAREQUEST,"Ask for data");
}

// ------------------ D E F A U L T  C A L L B A C K S -----------------------
 
void Ack_root()
{
  // In response to ping. We just send a throw-away Acknowledgement to say "im alive"
  while ( cmdMessenger.available() )
  {
    char buf[350] = { '\0' };
    cmdMessenger.copyString(buf, 350);
    if(buf[0])
    {
       Serial.println(buf);
       delay(100);
    }
  }
}
 
void unknownCmd()
{ 
  //discard potential wrong messages ( logs? )
}
 
// ------------------ E N D  C A L L B A C K  M E T H O D S ------------------

 void hello_coordinator_device()
{
  cmdMessenger.sendCmd(kACK, "Hello from coordinator");
  delay(100);
}
 
 
void setup() {
pinMode(led, OUTPUT);
Serial.begin(9600);

  cmdMessenger.attach(kACK, Ack_root);
  cmdMessenger.attach(unknownCmd);
  cmdMessenger.attach(kDATAANSWER, DataCallback);
  cmdMessenger.attach(kNOTIFYAWAKE, AwakeRequestCallback);
  
  hello_coordinator_device();
}
 
 
void loop() {
cmdMessenger.feedinSerialData();
delay(intervalCoordinatorCheck);
}

 
 
void alert()
{
  digitalWrite(led, HIGH);
delay(100);
digitalWrite(led, LOW);    
delay(100);     
digitalWrite(led, HIGH);
delay(100);
digitalWrite(led, LOW);    
delay(100);     
}