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

system/timer.h@0:42863a11464a, 2016-08-26 (annotated)

Committer:
ubhat
Date:
Fri Aug 26 19:36:35 2016 +0000
Revision:
0:42863a11464a
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)2013 Semtech
ubhat 0:42863a11464a 8
ubhat 0:42863a11464a 9 Description: Timer objects and scheduling management
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 #ifndef __TIMER_H__
ubhat 0:42863a11464a 16 #define __TIMER_H__
ubhat 0:42863a11464a 17
ubhat 0:42863a11464a 18 #include "mbed.h"
ubhat 0:42863a11464a 19
ubhat 0:42863a11464a 20 /*!
ubhat 0:42863a11464a 21 * \brief Timer object description
ubhat 0:42863a11464a 22 */
ubhat 0:42863a11464a 23 typedef struct TimerEvent_s
ubhat 0:42863a11464a 24 {
ubhat 0:42863a11464a 25 uint32_t value;
ubhat 0:42863a11464a 26 void ( *Callback )( void );
ubhat 0:42863a11464a 27 Ticker Timer;
ubhat 0:42863a11464a 28 }TimerEvent_t;
ubhat 0:42863a11464a 29
ubhat 0:42863a11464a 30 /*!
ubhat 0:42863a11464a 31 * \brief Timer time variable definition
ubhat 0:42863a11464a 32 */
ubhat 0:42863a11464a 33 #ifndef TimerTime_t
ubhat 0:42863a11464a 34 typedef uint32_t TimerTime_t;
ubhat 0:42863a11464a 35 #endif
ubhat 0:42863a11464a 36
ubhat 0:42863a11464a 37 /*!
ubhat 0:42863a11464a 38 * \brief Inializes the timer used to get current time.
ubhat 0:42863a11464a 39 *
ubhat 0:42863a11464a 40 * \remark Current time corresponds to the time since system startup
ubhat 0:42863a11464a 41 */
ubhat 0:42863a11464a 42 void TimerTimeCounterInit( void );
ubhat 0:42863a11464a 43
ubhat 0:42863a11464a 44 /*!
ubhat 0:42863a11464a 45 * \brief Initializes the timer object
ubhat 0:42863a11464a 46 *
ubhat 0:42863a11464a 47 * \remark TimerSetValue function must be called before starting the timer.
ubhat 0:42863a11464a 48 * this function initializes timestamp and reload value at 0.
ubhat 0:42863a11464a 49 *
ubhat 0:42863a11464a 50 * \param [IN] obj Structure containing the timer object parameters
ubhat 0:42863a11464a 51 * \param [IN] callback Function callback called at the end of the timeout
ubhat 0:42863a11464a 52 */
ubhat 0:42863a11464a 53 void TimerInit( TimerEvent_t *obj, void ( *callback )( void ) );
ubhat 0:42863a11464a 54
ubhat 0:42863a11464a 55 /*!
ubhat 0:42863a11464a 56 * \brief Starts and adds the timer object to the list of timer events
ubhat 0:42863a11464a 57 *
ubhat 0:42863a11464a 58 * \param [IN] obj Structure containing the timer object parameters
ubhat 0:42863a11464a 59 */
ubhat 0:42863a11464a 60 void TimerStart( TimerEvent_t *obj );
ubhat 0:42863a11464a 61
ubhat 0:42863a11464a 62 /*!
ubhat 0:42863a11464a 63 * \brief Stops and removes the timer object from the list of timer events
ubhat 0:42863a11464a 64 *
ubhat 0:42863a11464a 65 * \param [IN] obj Structure containing the timer object parameters
ubhat 0:42863a11464a 66 */
ubhat 0:42863a11464a 67 void TimerStop( TimerEvent_t *obj );
ubhat 0:42863a11464a 68
ubhat 0:42863a11464a 69 /*!
ubhat 0:42863a11464a 70 * \brief Resets the timer object
ubhat 0:42863a11464a 71 *
ubhat 0:42863a11464a 72 * \param [IN] obj Structure containing the timer object parameters
ubhat 0:42863a11464a 73 */
ubhat 0:42863a11464a 74 void TimerReset( TimerEvent_t *obj );
ubhat 0:42863a11464a 75
ubhat 0:42863a11464a 76 /*!
ubhat 0:42863a11464a 77 * \brief Set timer new timeout value
ubhat 0:42863a11464a 78 *
ubhat 0:42863a11464a 79 * \param [IN] obj Structure containing the timer object parameters
ubhat 0:42863a11464a 80 * \param [IN] value New timer timeout value
ubhat 0:42863a11464a 81 */
ubhat 0:42863a11464a 82 void TimerSetValue( TimerEvent_t *obj, uint32_t value );
ubhat 0:42863a11464a 83
ubhat 0:42863a11464a 84 /*!
ubhat 0:42863a11464a 85 * \brief Read the current time
ubhat 0:42863a11464a 86 *
ubhat 0:42863a11464a 87 * \retval time returns current time
ubhat 0:42863a11464a 88 */
ubhat 0:42863a11464a 89 TimerTime_t TimerGetCurrentTime( void );
ubhat 0:42863a11464a 90
ubhat 0:42863a11464a 91 /*!
ubhat 0:42863a11464a 92 * \brief Return the Time elapsed since a fix moment in Time
ubhat 0:42863a11464a 93 *
ubhat 0:42863a11464a 94 * \param [IN] savedTime fix moment in Time
ubhat 0:42863a11464a 95 * \retval time returns elapsed time
ubhat 0:42863a11464a 96 */
ubhat 0:42863a11464a 97 TimerTime_t TimerGetElapsedTime( TimerTime_t savedTime );
ubhat 0:42863a11464a 98
ubhat 0:42863a11464a 99 /*!
ubhat 0:42863a11464a 100 * \brief Return the Time elapsed since a fix moment in Time
ubhat 0:42863a11464a 101 *
ubhat 0:42863a11464a 102 * \param [IN] eventInFuture fix moment in the future
ubhat 0:42863a11464a 103 * \retval time returns difference between now and future event
ubhat 0:42863a11464a 104 */
ubhat 0:42863a11464a 105 TimerTime_t TimerGetFutureTime( TimerTime_t eventInFuture );
ubhat 0:42863a11464a 106
ubhat 0:42863a11464a 107 #endif // __TIMER_H__