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

app/LoRaEventProc.h@6:c5f2da0de0b0, 2018-07-18 (annotated)

Committer:
ubhat
Date:
Wed Jul 18 22:26:26 2018 +0000
Revision:
6:c5f2da0de0b0
Parent:
0:42863a11464a 
Add Channel Block option in Config.h; Fix board specific DevEUI allocation

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: Define events during Join, Tx & Rx
ubhat 0:42863a11464a 10 Prepare TX packet by appending with appropriate application data
ubhat 0:42863a11464a 11
ubhat 0:42863a11464a 12 License: Revised BSD License, see LICENSE.TXT file include in the project
ubhat 0:42863a11464a 13
ubhat 0:42863a11464a 14 Maintainer: Uttam Bhat
ubhat 0:42863a11464a 15 */
ubhat 0:42863a11464a 16
ubhat 0:42863a11464a 17 #ifndef __LORA_EVENT_PROC_H__
ubhat 0:42863a11464a 18 #define __LORA_EVENT_PROC_H__
ubhat 0:42863a11464a 19
ubhat 0:42863a11464a 20 #include "board.h"
ubhat 0:42863a11464a 21 #include "LoRaApp.h"
ubhat 0:42863a11464a 22 #include "LoRaDeviceStateProc.h"
ubhat 0:42863a11464a 23
ubhat 0:42863a11464a 24 #define APP_TX_DUTYCYCLE_RND 1000000
ubhat 0:42863a11464a 25
ubhat 0:42863a11464a 26 /*!
ubhat 0:42863a11464a 27 * \brief Prepares the payload of the frame specific to the application port
ubhat 0:42863a11464a 28 *
ubhat 0:42863a11464a 29 * \param [IN] port application port
ubhat 0:42863a11464a 30 */
ubhat 0:42863a11464a 31 void PrepareLoRaFrame( uint8_t port );
ubhat 0:42863a11464a 32
ubhat 0:42863a11464a 33 /*!
ubhat 0:42863a11464a 34 * \brief Prepares the payload of the frame based on application port
ubhat 0:42863a11464a 35 */
ubhat 0:42863a11464a 36 void InitNextTxInterrupt( uint8_t port );
ubhat 0:42863a11464a 37
ubhat 0:42863a11464a 38 /*!
ubhat 0:42863a11464a 39 * \brief Define action during the Network Join process: Blink, Toggle or Set LED ON
ubhat 0:42863a11464a 40 */
ubhat 0:42863a11464a 41 void JoinEvent( void );
ubhat 0:42863a11464a 42
ubhat 0:42863a11464a 43 /*!
ubhat 0:42863a11464a 44 * \brief Define action during the Transmit process: Blink, Toggle or Set LED ON
ubhat 0:42863a11464a 45 */
ubhat 0:42863a11464a 46 void TxEvent( void );
ubhat 0:42863a11464a 47
ubhat 0:42863a11464a 48 /*!
ubhat 0:42863a11464a 49 * \brief Define action when downlink received: Blink, Toggle or Set LED ON
ubhat 0:42863a11464a 50 */
ubhat 0:42863a11464a 51 void RxEvent( void );
ubhat 0:42863a11464a 52
ubhat 0:42863a11464a 53 #endif // __LORA_EVENT_PROC_H__