Development

Communication / 900:

» 900 10: Node search

This program shows how to search for a specific node inside the XBee's network. Once the node has been found a packet is sent to this node.

Required Materials

1 x Waspmote PRO
1 x Battery
1 x MiniUSB wire
1 x XBee-900

Notes

* It is recommended to turn on another XBee module in order to have some module to be scanned. It should have the same node identifier the code tries to seek: RECEIVER.

Code

/*  
 *  ------   [900_10] - node search     -------- 
 *  
 *  Explanation: This program shows how to search for a specific 
 *  node inside the XBee's network. Once the node has been found a 
 *  packet is sent to this node.
 *
 *  Copyright (C) 2012 Libelium Comunicaciones Distribuidas S.L. 
 *  http://www.libelium.com 
 *  
 *  This program is free software: you can redistribute it and/or modify 
 *  it under the terms of the GNU General Public License as published by 
 *  the Free Software Foundation, either version 3 of the License, or 
 *  (at your option) any later version. 
 *  
 *  This program is distributed in the hope that it will be useful, 
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of 
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 *  GNU General Public License for more details. 
 *  
 *  You should have received a copy of the GNU General Public License 
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>. 
 *  
 *  Version:           0.1 
 *  Design:            David Gascón 
 *  Implementation:    Yuri Carmona
 */
 
 #include <WaspXBee900.h>

// node Id to be searched
char* node="RECEIVER";

// variable to store searched Destination MAC Address
uint8_t mac[8]; 

// create packet to send
packetXBee* packet;


void setup()
{ 
  // init USB port
  USB.ON();
  USB.println(F("900_10 example"));

  //////////////////////////
  // 1. XBee set up
  //////////////////////////
  
  // 1.1. init XBee
  xbee900.ON();
      
  // 1.2. set NI (Node Identifier)
  xbee900.setNodeIdentifier("SENDER");
  
  // 1.3. save XBee values in memory
  xbee900.writeValues();
  
}

void loop()
{   
  ////////////////////////////////////////
  // 2. search node
  ////////////////////////////////////////
  
  if(!xbee900.nodeSearch(node, mac))
  {
    USB.print("\nmac:");
    USB.printHex(mac[0]);
    USB.printHex(mac[1]);
    USB.printHex(mac[2]);
    USB.printHex(mac[3]);
    USB.printHex(mac[4]);
    USB.printHex(mac[5]);
    USB.printHex(mac[6]);
    USB.printHex(mac[7]);
  }
  else USB.print("error");
  USB.println();
  
    
  ////////////////////////////////////////
  // 3. send a packet to the searched node
  ////////////////////////////////////////
   
  // 3.1. set packet parameters:
  packet=(packetXBee*) calloc(1,sizeof(packetXBee)); // memory allocation
  packet->mode=UNICAST; // set Unicast mode
  
  // 3.2. set Destination parameters
  xbee900.setDestinationParams(packet, mac, "This is a message"); 
  
  // 3.3. send data
  xbee900.sendXBee(packet); 
  
  // 3.4. check TX flag
  if( xbee900.error_TX == 0 ) 
  {
    USB.println(F("ok"));
  }
  else
  {
    USB.println(F("error"));
  }
  
  // 3.5. free memory
  free(packet);
  packet=NULL; 
  
  
  delay(3000);  

}  



Output

B#
900_10 example

mac:0013A2004066EF86
ok

mac:0013A2004066EF86
ok

mac:0013A2004066EF86
ok

mac:0013A2004066EF86
ok

...

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