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/utilities.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: Helper 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 #ifndef __UTILITIES_H__
ubhat 0:42863a11464a 16 #define __UTILITIES_H__
ubhat 0:42863a11464a 17
ubhat 0:42863a11464a 18 /*!
ubhat 0:42863a11464a 19 * \brief Returns the minimum value betwen a and b
ubhat 0:42863a11464a 20 *
ubhat 0:42863a11464a 21 * \param [IN] a 1st value
ubhat 0:42863a11464a 22 * \param [IN] b 2nd value
ubhat 0:42863a11464a 23 * \retval minValue Minimum value
ubhat 0:42863a11464a 24 */
ubhat 0:42863a11464a 25 #define MIN( a, b ) ( ( ( a ) < ( b ) ) ? ( a ) : ( b ) )
ubhat 0:42863a11464a 26
ubhat 0:42863a11464a 27 /*!
ubhat 0:42863a11464a 28 * \brief Returns the maximum value betwen a and b
ubhat 0:42863a11464a 29 *
ubhat 0:42863a11464a 30 * \param [IN] a 1st value
ubhat 0:42863a11464a 31 * \param [IN] b 2nd value
ubhat 0:42863a11464a 32 * \retval maxValue Maximum value
ubhat 0:42863a11464a 33 */
ubhat 0:42863a11464a 34 #define MAX( a, b ) ( ( ( a ) > ( b ) ) ? ( a ) : ( b ) )
ubhat 0:42863a11464a 35
ubhat 0:42863a11464a 36 /*!
ubhat 0:42863a11464a 37 * \brief Returns 2 raised to the power of n
ubhat 0:42863a11464a 38 *
ubhat 0:42863a11464a 39 * \param [IN] n power value
ubhat 0:42863a11464a 40 * \retval result of raising 2 to the power n
ubhat 0:42863a11464a 41 */
ubhat 0:42863a11464a 42 #define POW2( n ) ( 1 << n )
ubhat 0:42863a11464a 43
ubhat 0:42863a11464a 44 /*!
ubhat 0:42863a11464a 45 * \brief Initializes the pseudo ramdom generator initial value
ubhat 0:42863a11464a 46 *
ubhat 0:42863a11464a 47 * \param [IN] seed Pseudo ramdom generator initial value
ubhat 0:42863a11464a 48 */
ubhat 0:42863a11464a 49 void srand1( uint32_t seed );
ubhat 0:42863a11464a 50
ubhat 0:42863a11464a 51 /*!
ubhat 0:42863a11464a 52 * \brief Computes a random number between min and max
ubhat 0:42863a11464a 53 *
ubhat 0:42863a11464a 54 * \param [IN] min range minimum value
ubhat 0:42863a11464a 55 * \param [IN] max range maximum value
ubhat 0:42863a11464a 56 * \retval random random value in range min..max
ubhat 0:42863a11464a 57 */
ubhat 0:42863a11464a 58 int32_t randr( int32_t min, int32_t max );
ubhat 0:42863a11464a 59
ubhat 0:42863a11464a 60 /*!
ubhat 0:42863a11464a 61 * \brief Copies size elements of src array to dst array
ubhat 0:42863a11464a 62 *
ubhat 0:42863a11464a 63 * \remark STM32 Standard memcpy function only works on pointers that are aligned
ubhat 0:42863a11464a 64 *
ubhat 0:42863a11464a 65 * \param [OUT] dst Destination array
ubhat 0:42863a11464a 66 * \param [IN] src Source array
ubhat 0:42863a11464a 67 * \param [IN] size Number of bytes to be copied
ubhat 0:42863a11464a 68 */
ubhat 0:42863a11464a 69 void memcpy1( uint8_t *dst, const uint8_t *src, uint16_t size );
ubhat 0:42863a11464a 70
ubhat 0:42863a11464a 71 /*!
ubhat 0:42863a11464a 72 * \brief Copies size elements of src array to dst array reversing the byte order
ubhat 0:42863a11464a 73 *
ubhat 0:42863a11464a 74 * \param [OUT] dst Destination array
ubhat 0:42863a11464a 75 * \param [IN] src Source array
ubhat 0:42863a11464a 76 * \param [IN] size Number of bytes to be copied
ubhat 0:42863a11464a 77 */
ubhat 0:42863a11464a 78 void memcpyr( uint8_t *dst, const uint8_t *src, uint16_t size );
ubhat 0:42863a11464a 79
ubhat 0:42863a11464a 80 /*!
ubhat 0:42863a11464a 81 * \brief Set size elements of dst array with value
ubhat 0:42863a11464a 82 *
ubhat 0:42863a11464a 83 * \remark STM32 Standard memset function only works on pointers that are aligned
ubhat 0:42863a11464a 84 *
ubhat 0:42863a11464a 85 * \param [OUT] dst Destination array
ubhat 0:42863a11464a 86 * \param [IN] value Default value
ubhat 0:42863a11464a 87 * \param [IN] size Number of bytes to be copied
ubhat 0:42863a11464a 88 */
ubhat 0:42863a11464a 89 void memset1( uint8_t *dst, uint8_t value, uint16_t size );
ubhat 0:42863a11464a 90
ubhat 0:42863a11464a 91 /*!
ubhat 0:42863a11464a 92 * \brief Converts a nibble to an hexadecimal character
ubhat 0:42863a11464a 93 *
ubhat 0:42863a11464a 94 * \param [IN] a Nibble to be converted
ubhat 0:42863a11464a 95 * \retval hexChar Converted hexadecimal character
ubhat 0:42863a11464a 96 */
ubhat 0:42863a11464a 97 int8_t Nibble2HexChar( uint8_t a );
ubhat 0:42863a11464a 98
ubhat 0:42863a11464a 99 #endif // __UTILITIES_H__