Development

Communication / ZigBee:

» ZB 02b: Join unkown network

This program shows how to search for a new coordinator when network parameters are unknown. It is necessary to scan a new coordinator setting different channels to be scanned

Required Materials

1 x Waspmote
1 x Battery
1 x MiniUSB wire
1 x XBee-ZigBee module

Notes

- The coordinator must be turned on
- To store parameter changes after power cycles, it is needed to execute the "writeValues" function. If not, when the XBee is powered off, values do not remain in the module's memory.

Code

/*
    ------ [ZB_02b] - router joins an unknown coordinator --------

    Explanation: This program shows how to search for a new coordinator
    when network parameters are unknown. It is necessary to scan a new
    coordinator setting different channels to be scanned

    Copyright (C) 2016 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:           0.2
    Design:            David Gascón
    Implementation:    Yuri Carmona
*/

#include <WaspXBeeZB.h>

// PAN ID to set in order to search a new coordinator
uint8_t  PANID[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};


void setup()
{
  // init USB port
  USB.ON();
  USB.println(F("ZB_02b example"));


  ///////////////////////////////////////////////
  // Init XBee
  ///////////////////////////////////////////////
  xbeeZB.ON();


  ///////////////////////////////////////////////
  // 1. Disable Coordinator mode
  ///////////////////////////////////////////////

  /*************************************
    WARNING: Only XBee ZigBee S2C and
    XBee ZigBee S2D are able to use
    this function properly
  ************************************/
  xbeeZB.setCoordinator(DISABLED);

  // check at command flag
  if (xbeeZB.error_AT == 0)
  {
    USB.println(F("1. Coordinator mode disabled"));
  }
  else
  {
    USB.println(F("1. Error while disabling Coordinator mode"));
  }


  ///////////////////////////////////////////////
  // 2. Dissociation process
  ///////////////////////////////////////////////
    
  /////////////////////////////////////
  // 2.1. Set PANID: 0x0000000000000000
  /////////////////////////////////////
  xbeeZB.setPAN(PANID);

  // check at command flag
  if (xbeeZB.error_AT == 0)
  {
    USB.println(F("2.1. PANID set OK"));
  }
  else
  {
    USB.println(F("2.1. Error while setting PANID"));
  }

  
  /////////////////////////////////////
  // 2.2. set all possible channels to scan
  /////////////////////////////////////
  // channels from 0x0B to 0x18 (0x19 and 0x1A are excluded)
  /* Range:[0x0 to 0x3FFF]
    Channels are scpedified as a bitmap where depending on
    the bit a channel is selected --> Bit (Channel):
     0 (0x0B)  4 (0x0F)  8 (0x13)   12 (0x17)
     1 (0x0C)  5 (0x10)  9 (0x14)   13 (0x18)
     2 (0x0D)  6 (0x11)  10 (0x15)
     3 (0x0E)  7 (0x12)	 11 (0x16)    */
  xbeeZB.setScanningChannels(0x3F, 0xFF);

  // check AT command flag
  if ( xbeeZB.error_AT == 0 )
  {
    USB.println(F("2.2. Scanning channels set OK"));
  }
  else
  {
    USB.println(F("2.2. Error while setting 'Scanning channels'"));
  }


  /////////////////////////////////////
  // 2.3. Set channel verification JV=1 
  // in order to make the module to scan 
  // a new coordinator
  /////////////////////////////////////
  xbeeZB.setChannelVerification(1);

  // check AT command flag
  if ( xbeeZB.error_AT == 0 )
  {
    USB.println(F("2.3. Verification channel set OK"));
  }
  else
  {
    USB.println(F("2.3. Error while setting verification channel"));
  }


  ///////////////////////////////////////////////
  // Save values
  ///////////////////////////////////////////////
  xbeeZB.writeValues();


  ///////////////////////////////////////////////
  // Reboot XBee module
  ///////////////////////////////////////////////
  xbeeZB.OFF();
  delay(3000);
  xbeeZB.ON();

  delay(3000);



  /////////////////////////////////////
  // 3. Wait for Association
  /////////////////////////////////////

  // Wait for association indication
  xbeeZB.getAssociationIndication();

  while ( xbeeZB.associationIndication != 0 )
  {
    delay(2000);

    // get operating 64-b PAN ID
    xbeeZB.getOperating64PAN();

    USB.print(F("Operating 64-b PAN ID: "));
    USB.printHex(xbeeZB.operating64PAN[0]);
    USB.printHex(xbeeZB.operating64PAN[1]);
    USB.printHex(xbeeZB.operating64PAN[2]);
    USB.printHex(xbeeZB.operating64PAN[3]);
    USB.printHex(xbeeZB.operating64PAN[4]);
    USB.printHex(xbeeZB.operating64PAN[5]);
    USB.printHex(xbeeZB.operating64PAN[6]);
    USB.printHex(xbeeZB.operating64PAN[7]);
    USB.println();

    xbeeZB.getAssociationIndication();
  }


  USB.println(F("\n\nJoined a coordinator!"));

  // 2.2. When XBee is associated print all network
  // parameters unset channel verification JV=0
  xbeeZB.setChannelVerification(0);
  xbeeZB.writeValues();

  // 2.3. get network parameters
  xbeeZB.getOperating16PAN();
  xbeeZB.getOperating64PAN();
  xbeeZB.getChannel();

  USB.print(F("Operating 16-b PAN ID: "));
  USB.printHex(xbeeZB.operating16PAN[0]);
  USB.printHex(xbeeZB.operating16PAN[1]);
  USB.println();

  USB.print(F("Operating 64-b PAN ID: "));
  USB.printHex(xbeeZB.operating64PAN[0]);
  USB.printHex(xbeeZB.operating64PAN[1]);
  USB.printHex(xbeeZB.operating64PAN[2]);
  USB.printHex(xbeeZB.operating64PAN[3]);
  USB.printHex(xbeeZB.operating64PAN[4]);
  USB.printHex(xbeeZB.operating64PAN[5]);
  USB.printHex(xbeeZB.operating64PAN[6]);
  USB.printHex(xbeeZB.operating64PAN[7]);
  USB.println();

  USB.print(F("Channel: "));
  USB.printHex(xbeeZB.channel);
  USB.println();

}


void loop()
{
  // Do nothing
}

Output

E#
ZB_02b example
PANID set OK
scanning channels set OK
verification channel set OK
operating 64-b PAN ID: 0000000000000000
operating 64-b PAN ID: 0000000000000000
operating 64-b PAN ID: 1122334455667788


Joined a coordinator!
operating 16-b PAN ID: 7C7A
operating 64-b PAN ID: 1122334455667788
channel: 0E

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