Uttam Bhat / LoRaWAN-SX1276-Application-Demo

SX1276 Shield based Applications

Dependencies:   X_NUCLEO_IKS01A1 LoRaWAN-lib SX1276Lib mbed

LoRaWAN-SX1276-Application Demo uses SX1276MB1LAS mbed component shield on a nucleo board platform to demonstrate a Class-A LoRaWAN device in the 915MHz ISM band for North American region. It uses the LoRaWAN-lib and SX1276Lib libraries.

Comissioning.h (LoRaWAN Network Configuration)

The end-device can be activated in one of the two ways:

Over the Air (OTA) activation can be enabled as shown in the figure below. /media/uploads/ubhat/ota_enable.png

The end-device must be configured with the following parameters:

  • LORAWAN_DEVICE_EUI (8 Bytes) : Fist 3 Bytes is the Organizationally Unique Identifier (OUI) followed by 5 bytes of unique ID. If not defined by user, then the firmware automatically assigns one to the end-device
  • LORAWAN_APPLICATION_EUI (8 Bytes)
  • LORAWAN_APPLICATION_KEY (or DEVKEY) (16 Bytes)

/media/uploads/ubhat/ota_eui.png

Activation by Personalization (ABP) can be enabled as shown in the figure below. /media/uploads/ubhat/abp_enable.png

The end-device must be configured with the following parameters:

  • LORAWAN_DEVICE_ADDRESS (4 Bytes) : If not defined by user, then the firmware automatically assigns one to the end-device
  • LORAWAN_NWKSKEY (16 Bytes)
  • LORAWAN_APPSKEY (16 Bytes)

/media/uploads/ubhat/abp_key.png

Config.h (LoRaWAN Communication Parameters)

  • Mode of Operation : Hybrid If the end-device needs to be configured to operate over 8-channels, then Hybrid Mode needs to be enabled /media/uploads/ubhat/hybridenable.png
  • Mode of Operation : Frequency Hop If the end-device needs to be configured to operate over 64-channels, then Hybrid Mode needs to be disabled
  • Delay between successive JOIN REQUESTs : The delay between successive Join Requests (until the end-device joins the network) can be configured using the parameter OVER_THE_AIR_ACTIVATION_DUTYCYCLE
  • Inter-Frame Delay : One can change the delay between each frame transmission using APP_TX_DUTYCYCLE It is advisable that APP_TX_DUTYCYCLE is greater than or equal to 3sec.
  • Data Rate : The data rate can be configured as per LoRaWAN specification using the paramter LORAWAN_DEFAULT_DATARATE. The range of values are DR_0, DR_1, DR_2, DR_3 and DR_4
  • Confirmed/Unconfirmed Messages : The uplink message or payload can be chosen to be confirmed or unconfirmed using the parameter LORAWAN_CONFIRMED_MSG_ON. When set to 1, the transmitted messages need to be confirmed with an ACK by the network server in the subsequent RX window. When set to 0, no ACK is requested.
  • ADR ON/OFF : The ADR can be enabled or disabled using the parameter LORAWAN_ADR_ON. When set to 1, ADR is enabled and disabled when set to 0.
  • Application Port : The application port can be set using parameter LORAWAN_APP_PORT. A few examples are associated to specific Application Port, and are defined in Config.h
  • Payload Length : The lenght of the payload (in bytes) to be transmitted can be configured using LORAWAN_APP_DATA_SIZE
  • Transmit Power : The transmit power can be configured using LORAWAN_TX_POWER (LoRaMAC verifies if the set power is compliant with the LoRaWAN spec and FCC guidelines)

/media/uploads/ubhat/loraconfig.png

The baud-rate for serial terminal display is 115200

board/board.cpp@0:42863a11464a, 2016-08-26 (annotated)

Committer:
ubhat
Date:
Fri Aug 26 19:36:35 2016 +0000
Revision:
0:42863a11464a
Child:
1:80c1daf19aa4
SX1276 Shield based Applications

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ubhat 0:42863a11464a 1 /*
ubhat 0:42863a11464a 2 / _____) _ | |
ubhat 0:42863a11464a 3 ( (____ _____ ____ _| |_ _____ ____| |__
ubhat 0:42863a11464a 4 \____ \| ___ | (_ _) ___ |/ ___) _ \
ubhat 0:42863a11464a 5 _____) ) ____| | | || |_| ____( (___| | | |
ubhat 0:42863a11464a 6 (______/|_____)_|_|_| \__)_____)\____)_| |_|
ubhat 0:42863a11464a 7 (C)2015 Semtech
ubhat 0:42863a11464a 8
ubhat 0:42863a11464a 9 Description: Target board general functions implementation
ubhat 0:42863a11464a 10
ubhat 0:42863a11464a 11 License: Revised BSD License, see LICENSE.TXT file include in the project
ubhat 0:42863a11464a 12
ubhat 0:42863a11464a 13 Maintainer: Miguel Luis and Gregory Cristian
ubhat 0:42863a11464a 14 */
ubhat 0:42863a11464a 15 #include "mbed.h"
ubhat 0:42863a11464a 16 #include "board.h"
ubhat 0:42863a11464a 17
ubhat 0:42863a11464a 18 MoteVersion_t BoardGetVersion( void );
ubhat 0:42863a11464a 19
ubhat 0:42863a11464a 20 DigitalIn I2cInterrupt( PB_4 );
ubhat 0:42863a11464a 21 I2C I2c(I2C_SDA, I2C_SCL);
ubhat 0:42863a11464a 22
ubhat 0:42863a11464a 23 DigitalOut Pc7( PC_7 );
ubhat 0:42863a11464a 24 DigitalIn Pc1( PC_1 );
ubhat 0:42863a11464a 25
ubhat 0:42863a11464a 26 #define AIN_VREF 3.3 // STM32 internal refernce
ubhat 0:42863a11464a 27 #define AIN_VBAT_DIV 2 // Resistor divider
ubhat 0:42863a11464a 28
ubhat 0:42863a11464a 29 SX1276MB1xAS Radio( NULL );
ubhat 0:42863a11464a 30
ubhat 0:42863a11464a 31 void BoardInit( void )
ubhat 0:42863a11464a 32 {
ubhat 0:42863a11464a 33 TimerTimeCounterInit( );
ubhat 0:42863a11464a 34 }
ubhat 0:42863a11464a 35
ubhat 0:42863a11464a 36
ubhat 0:42863a11464a 37 uint8_t BoardGetBatteryLevel( void )
ubhat 0:42863a11464a 38 {
ubhat 0:42863a11464a 39 return 0xFE;
ubhat 0:42863a11464a 40 }
ubhat 0:42863a11464a 41
ubhat 0:42863a11464a 42 uint32_t BoardGetRandomSeed( void )
ubhat 0:42863a11464a 43 {
ubhat 0:42863a11464a 44 return ( ( *( uint32_t* )ID1 ) ^ ( *( uint32_t* )ID2 ) ^ ( *( uint32_t* )ID3 ) );
ubhat 0:42863a11464a 45 }
ubhat 0:42863a11464a 46
ubhat 0:42863a11464a 47 void BoardGetDevEUI( uint8_t *id )
ubhat 0:42863a11464a 48 {
ubhat 0:42863a11464a 49 uint32_t *pDevEuiHWord = ( uint32_t* )&id[4];
ubhat 0:42863a11464a 50
ubhat 0:42863a11464a 51 if( *pDevEuiHWord == 0 )
ubhat 0:42863a11464a 52 {
ubhat 0:42863a11464a 53 *pDevEuiHWord = BoardGetRandomSeed( );
ubhat 0:42863a11464a 54 }
ubhat 0:42863a11464a 55
ubhat 0:42863a11464a 56 }
ubhat 0:42863a11464a 57
ubhat 0:42863a11464a 58 void BoardGetUniqueId( uint8_t *id )
ubhat 0:42863a11464a 59 {
ubhat 0:42863a11464a 60 id[7] = ( ( *( uint32_t* )ID1 )+ ( *( uint32_t* )ID3 ) ) >> 24;
ubhat 0:42863a11464a 61 id[6] = ( ( *( uint32_t* )ID1 )+ ( *( uint32_t* )ID3 ) ) >> 16;
ubhat 0:42863a11464a 62 id[5] = ( ( *( uint32_t* )ID1 )+ ( *( uint32_t* )ID3 ) ) >> 8;
ubhat 0:42863a11464a 63 id[4] = ( ( *( uint32_t* )ID1 )+ ( *( uint32_t* )ID3 ) );
ubhat 0:42863a11464a 64 id[3] = ( ( *( uint32_t* )ID2 ) ) >> 24;
ubhat 0:42863a11464a 65 id[2] = ( ( *( uint32_t* )ID2 ) ) >> 16;
ubhat 0:42863a11464a 66 id[1] = ( ( *( uint32_t* )ID2 ) ) >> 8;
ubhat 0:42863a11464a 67 id[0] = ( ( *( uint32_t* )ID2 ) );
ubhat 0:42863a11464a 68 }
ubhat 0:42863a11464a 69