This example shows how to configure the SX1272 module in LoRa mode and then send packets with Waspmote Frames within the payload
Required Materials
1 x Waspmote PRO
1 x Battery
1 x MiniUSB wire
1 x SX1272 module (LoRa)
1 x Receiver module with SX_05b example
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_05a] - TX LoRa with Waspmote Frame --------
*
* Explanation: This example shows how to configure the semtech
* module in LoRa mode and then send packets with Waspmote Frames
* within the payload
*
* 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 .
*
* Version: 0.1
* Design: David Gascón
* Implementation: Covadonga Albiñana, Yuri Carmona
*/
// Include these libraries to transmit frames with sx1272
#include <WaspSX1272.h>
#include <WaspFrame.h>
// Define private key to encrypt message
char nodeID[] = "node_001";
// define the destination address to send packets
uint8_t rx_address = 5;
// status variable
int8_t e;
void setup()
{
// Init USB port
USB.ON();
USB.println(F("SX_05a example"));
USB.println(F("Semtech SX1272 module. TX LoRa with Waspmote Frame"));
// set the node ID
frame.setID(nodeID);
USB.println(F("----------------------------------------"));
USB.println(F("Setting configuration:"));
USB.println(F("----------------------------------------"));
// Init SX1272 module
sx1272.ON();
// Select frequency channel
e = sx1272.setChannel(CH_11_868);
USB.print(F("Setting Channel CH_11_868.\t state "));
USB.println(e);
// Select implicit (off) or explicit (on) 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(1);
USB.print(F("Setting Mode '1'.\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(4);
USB.print(F("Setting Node Address to '4'.\t state "));
USB.println(e);
USB.println();
delay(1000);
USB.println(F("----------------------------------------"));
USB.println(F("Sending:"));
USB.println(F("----------------------------------------"));
}
void loop()
{
////////////////////////////////////////////////
// 1. Create a new Frame with sensor fields
////////////////////////////////////////////////
USB.println(F("Create new Frame:"));
// Creating frame to send
frame.createFrame(ASCII);
// Adding sensor battery
frame.addSensor(SENSOR_BAT, (uint8_t) PWR.getBatteryLevel());
// Show frame via USB port
frame.showFrame();
////////////////////////////////////////////////////////////////
// 2. Send Frame to another Waspmote
////////////////////////////////////////////////////////////////
// Sending packet
sx1272.sendPacketTimeout( rx_address, frame.buffer, frame.length);
// Check sending status
if( e == 0 )
{
USB.println(F("Packet sent OK"));
}
else
{
USB.println(F("Error sending the packet"));
USB.print(F("state: "));
USB.println(e, DEC);
}
USB.println();
delay(1000);
}
Output
H#
SX_05a example
Semtech SX1272 module. TX LoRa with Waspmote Frame
----------------------------------------
Setting configuration:
----------------------------------------
Setting Channel CH_11_868. state 0
Setting Header ON. state 0
Setting Mode '1'. state 0
Setting CRC ON. state 0
Setting Power to 'H'. state 0
Setting Node Address to '4'. state 0
----------------------------------------
Sending:
----------------------------------------
Create new Frame:
===============================
Current ASCII Frame:
Length: 34
Frame Type: 128
frame (HEX): 3C3D3E800123333837323536303030236E6F64655F3030312330234241543A393823
frame (STR): <=>#387256000#node_001#0#BAT:98#
===============================
Packet sent OK
Create new Frame:
===============================
Current ASCII Frame:
Length: 34
Frame Type: 128
frame (HEX): 3C3D3E800123333837323536303030236E6F64655F3030312331234241543A393923
frame (STR): <=>#387256000#node_001#1#BAT:99#
===============================
Packet sent OK
Create new Frame:
===============================
Current ASCII Frame:
Length: 34
Frame Type: 128
frame (HEX): 3C3D3E800123333837323536303030236E6F64655F3030312332234241543A393923
frame (STR): <=>#387256000#node_001#2#BAT:99#
===============================
Packet sent OK
...