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.

» SX 11: RX wACK from all nodes

This example shows how to configure the semtech module in LoRa mode and then receive packets from any node. When a packet is received, an ACK is sent back to the sender. This code works as a network sniffer because independently the packet is sent to, this module gets it and shows it.

Required Materials

1 x Waspmote PRO
1 x Battery
1 x MiniUSB wire
1 x SX1272 module (LoRa)
1 x At least one sender to check this receiving code

Notes

- The SX1272 module is provided with a special 4.5 dBi antenna, which enables maximum range. The only exception is Smart Parking; in this case the antenna is smaller, 0 dBi, to fit inside the enclosure.
- It is not recommended to work without an antenna screwed to the module. The module could be damaged due to RF reflections.
- The SX1272 module can only be used in special Waspmote units which have been modified to drive the SPI pins to SOCKET0. (only SOCKET0 is available for SX1272)
- This module does not save the configuration. So, the network settings as the mode or the channel MUST be configured every time it is switched on.
- This example can be executed in Waspmote v12 and Waspmote v15

Code

/*  
 *  ------ [SX_10] - RX LoRa from all Nodes with ACK -------- 
 *
 *  Explanation: This example shows how to configure the semtech 
 *  module in LoRa mode and then receive packets from any node. When a
 *  packet is received, an ACK is sent back to the sender. This
 *  code works as a network sniffer because independently the packet is
 *  sent to, this module gets it and shows it.
 *  
 *  Copyright (C) 2014 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/>.  
 */

// Put your libraries here (#include ...)
#include <WaspSX1272.h>

// status variable
int8_t e;


void setup() 
{
  // init USB port
  USB.ON();
  USB.println(F("Semtech SX1272 module RX in LoRa, complete example"));

  // init SX1272 module
  sx1272.ON();

  // select frequency channel
  e = sx1272.setChannel(CH_14_868);  
  USB.print(F("Setting Channel CH_14_868.\t state ")); 
  USB.println(e);

  // select implicit or explicit header mode
  e = sx1272.setHeaderON();
  USB.print(F("Setting Header ON.\t\t state "));  
  USB.println(e); 

  // Select mode: from 1 to 10
  e = sx1272.setMode(10);
  USB.print(F("Setting Mode '10'.\t\t state ")); 
  USB.println(e);  

  // Select CRC on or off
  e = sx1272.setCRC_ON();
  USB.print(F("Setting CRC ON.\t\t\t state "));
  USB.println(e);

  // Select output power (Max, High or Low)
  e = sx1272.setPower('H');
  USB.print(F("Setting Power to 'H'.\t\t state "));  
  USB.println(e); 

  // select the node address value: from 2 to 255
  e = sx1272.setNodeAddress(53);
  USB.print(F("Setting Node Address to '53'.\t state "));
  USB.println(e); 
  USB.println();

  delay(1000);  

  USB.println(F("--------------------------------------------------"));
  USB.println(F("Receiving from All Nodes (with ACK response):")); 
  USB.println(F("--------------------------------------------------"));
}


void loop()
{
  // Receive from all Nodes
  e = sx1272.receiveAll(10000);
  
  // check RX status
  if( e == 0 )
  {
    // if packet received then send ACK
    e = sx1272.setACK();
    if( e == 0 )
    {
      e = sx1272.sendWithTimeout();
      USB.print(F("ACK sent, state "));
      USB.println(e, DEC);
    }
    else
    {
      USB.println(F("There has been any error while setting ACK"));
    }
  }
  else
  {
    USB.println(F("There has been any error while receiving packet"));
  }
}

Output

H#
Semtech SX1272 module RX in LoRa, complete example
Setting Channel CH_14_868. state 0
Setting Header ON. state 0
Setting Mode '10'. state 0
Setting CRC ON. state 0
Setting Power to 'H'. state 0
Setting Node Address to '53'. state 0

--------------------------------------------------
Receiving from All Nodes (with ACK response):
--------------------------------------------------
ACK sent, state 0
ACK sent, state 0
ACK sent, state 0
ACK sent, state 0
ACK sent, state 0
ACK sent, state 0
ACK sent, state 0
ACK sent, state 0
ACK sent, state 0
ACK sent, state 0
ACK sent, state 0
ACK sent, state 0
...

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