Development v12

Warning - Product Update

All the resources present on this section belong to Waspmote v12, Waspmote Plug & Sense! v12 and Meshlium v3.8.

If you have a Waspmote v15, Waspmote Plug & Sense! v15 or Meshlium v4.0 please go to the new Development Section.

Check what is your version and what are the differences between the old and the new one in this document.

» 802 03: Receive packets

This program shows how to receive packets with XBee-802.15.4 modules.

Required Materials

1 x Waspmote PRO
1 x Battery
1 x MiniUSB wire
2 x XBee-802.15.4 modules (emitter & receiver)

Notes

- It is necessary to set a emitter Waspmote in order to receive packets with this example. The 802_02: Send packets can be used for this purpose.
- The battery has to be connected.
- This example can be executed in Waspmote v12 and Waspmote v15

Code

/*  
 *  ------ [802_03] - receive XBee packets -------- 
 *  
 *  Explanation: This program shows how to receive packets with 
 *  XBee-802.15.4 modules.
 *  
 *  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:           3.0
 *  Design:            David Gascón 
 *  Implementation:    Yuri Carmona
 */
 
#include <WaspXBee802.h>

// define variable
uint8_t error;


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

  // init XBee 
  xbee802.ON();
}


void loop()
{ 
  // receive XBee packet (wait for 10 seconds)
  error = xbee802.receivePacketTimeout( 10000 );

  // check answer  
  if( error == 0 ) 
  {
    // Show data stored in '_payload' buffer indicated by '_length'
    USB.print(F("Data: "));  
    USB.println( xbee802._payload, xbee802._length);
    
    // Show data stored in '_payload' buffer indicated by '_length'
    USB.print(F("Length: "));  
    USB.println( xbee802._length,DEC);
  }
  else
  {
    // Print error message:
    /*
     * '7' : Buffer full. Not enough memory space
     * '6' : Error escaping character within payload bytes
     * '5' : Error escaping character in checksum byte
     * '4' : Checksum is not correct	  
     * '3' : Checksum byte is not available	
     * '2' : Frame Type is not valid
     * '1' : Timeout when receiving answer   
    */
    USB.print(F("Error receiving a packet:"));
    USB.println(error,DEC);     
  }
} 

Output

H#
Receiving example
Data: <=>€#387245265#node_01#0#STR:new_sensor_frame#BAT:26#
Length: 54
Data: <=>€#387245265#node_01#1#STR:new_sensor_frame#BAT:27#
Length: 54
...

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