Xbee Api connection

Using Arduino Networking, Protocols, and Devices
10

Ok,

I modified a bit my code, but it doesn't work yet. I need to send and receive a simple message, but I want to use API mode to check (ACK, like TCP) the receivement of the message, so sender can re-send the message in case the message will be loose.

I write my code below, so if somebody could check it and tell me a tip, it would be great.

SEND:

#include <XBee.h>

XBee xbee = XBee();

uint8_t payload[] = { "OK" };
int pin = 13;
//char sendMsg[] = "OK";

XBeeAddress64 addr64 = XBeeAddress64(0x0013A200, 0x10101010);    //@MAC coordinator
ZBTxRequest zbTx = ZBTxRequest(addr64, payload, sizeof(payload));
ZBTxStatusResponse txStatus = ZBTxStatusResponse();

void setup() {
  pinMode(pin, OUTPUT);

  xbee.begin(57600);
}

void loop() {   
  digitalWrite(pin, HIGH);
  
//  payload = (uint8_t)sendMsg;
//  Serial.print("Send Message: [");
//  Serial.print(payload);
//  Serial.println("]");
  
  xbee.send(zbTx);
  Serial.println("Sending TX packets.");

  if (xbee.readPacket(5000)) {
    Serial.println("\tHaving Response.");
    	
    if (xbee.getResponse().getApiId() == ZB_TX_STATUS_RESPONSE) {
      xbee.getResponse().getZBTxStatusResponse(txStatus);
      Serial.println("\t\tTX STATUS");
      
      if (txStatus.getDeliveryStatus() == SUCCESS) {
        Serial.println("\t\t\tSUCCESS");
      }
    }
  } 

  Serial.flush();
  delay(500);
  digitalWrite(pin, LOW);
  delay(5000);
}

RECEIVE:

#include <XBee.h>

XBee xbee = XBee();
XBeeResponse response = XBeeResponse();

ZBRxResponse rx = ZBRxResponse();

int pin = 13;
uint8_t *data;

void setup() {
  pinMode(pin, OUTPUT);

  xbee.begin(57600);
}

void loop() {
  digitalWrite(pin, HIGH);

  xbee.readPacket();
  Serial.println("Checking RX packets.");

  if (xbee.getResponse().isAvailable()) {
    Serial.println("There's some RX.");

    if (xbee.getResponse().getApiId() == ZB_RX_RESPONSE) {
      Serial.println("\tThere's RX packet.");
      xbee.getResponse().getZBRxResponse(rx);
      data = rx.getData();
    }
  }
  
  Serial.flush();
  delay(500);
  digitalWrite(pin, LOW);
  delay(5000);
}