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

Revision:
0:42863a11464a
Child:
2:78df92a365c2
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/LoRaApp.h	Fri Aug 26 19:36:35 2016 +0000
@@ -0,0 +1,151 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+    (C)2015 Semtech
+
+Description: User-defined applications such as GPS, Temp, Accelerometer, LED indications etc.
+            Event based actions such as LED blink on Tx, LED toggle on downlink etc
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+
+Maintainer: Uttam Bhat
+*/
+
+#ifndef __APPLICATION_H__
+#define __APPLICATION_H__
+
+#include "board.h"
+#include "Common.h"
+#include "SerialDisplay.h"
+
+/*!
+ * LED ON/OFF definition
+ */
+#define LED_ON          0
+#define LED_OFF         1
+
+/*!
+ * LED types
+ */
+enum eLedType
+{
+    Red = 0,// Red LED
+    Yellow = 1, // Yellow LED
+    Green = 2, // Green LED
+    Usr = 3, // USR LED
+};
+
+/*!
+ * user-defined Application names
+ */
+enum eAppType
+{
+    AppGps = 0, // GPS application
+    AppTemp = 1, // Temperature measurement application
+    AppBat = 2, // Battery measurement application
+    AppRamp = 3, // Generate Ramp bytes
+    AppAccl = 4, // Accelerometer application
+    AppAcclSenet = 5, // Senet + M2X application example
+    AppPushButton = 6, // Push button application example
+};
+
+/*!
+ * Application
+ */
+class Application 
+{
+public:
+    /*!  
+     * \brief Initializes TX buffer address to private pointer
+     *
+     * \param [IN] memptr pointer to TX buffer
+     */
+    Application( uint8_t * memptr );
+
+    /*!
+     * \brief Application Destructor
+     */
+    ~Application( );
+    
+     /*!     
+     * \brief Call application type and append to application buffer
+     *
+     * \param [IN] AppType application type: GPS, Battery, Temp etc.
+     */
+    void ApplicationCall( eAppType AppType );
+     
+     /*!     
+     * \brief Append data to the TX buffer
+     *
+     * \param [IN] pData pointer to the data to be appended to TX buffer
+     * \param [IN] Len lenght of the data to be appended to TX buffer
+     */
+    void ApplicationAppendData( uint8_t *pData, uint8_t len );
+    
+     /*!     
+     * \brief Point the pointer corresponding to the TX buffer to specified index
+     *
+     * \param [IN] ptrPos index to where to point to in the TX buffer
+     */
+    void ApplicationPtrPos( uint8_t ptrPos );
+
+private:
+    /*!
+     * Index to the application buffer
+     */
+    uint8_t BuffPtr;
+    /*!
+     * Application buffer address pointer
+     */
+    uint8_t *BuffAddr;   
+};
+
+class TimerLed
+{
+public:
+    TimerEvent_t LedTimer;      
+    TimerLed( eLedType );
+    ~TimerLed( );
+};
+
+extern TimerLed RedLedTimer;
+
+extern TimerLed YellowLedTimer;
+
+extern TimerLed GreenLedTimer;
+
+extern Application LoRaApp;
+
+extern bool AppLed;
+
+extern bool VerticalStatus;
+
+/*!  
+* \brief Blink LED
+*
+* \param [IN] led Red, yellow or green LED
+* \param [IN] time time in usec for which the LED must be ON
+ */
+void BlinkLED( eLedType led, uint32_t time );
+
+/*!  
+* \brief Turn LED ON if OFF; OFF if ON
+*
+* \param [IN] led Red, yellow or green LED
+*/
+void ToggleLED( eLedType led );
+
+/*!  
+* \brief Control the State of the LED
+*
+* \param [IN] led Red, yellow or green LED
+* \param [IN] state ON or OFF
+*/
+void CtrlLED( eLedType led, uint8_t state );
+
+void CheckOrientation( void );
+
+#endif // __APPLICATION_H__
\ No newline at end of file