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.
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-deviceLORAWAN_APPLICATION_EUI
(8 Bytes)LORAWAN_APPLICATION_KEY
(or DEVKEY) (16 Bytes)
Activation by Personalization (ABP) can be enabled as shown in the figure below.
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-deviceLORAWAN_NWKSKEY
(16 Bytes)LORAWAN_APPSKEY
(16 Bytes)
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
- 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 thatAPP_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 anACK
by the network server in the subsequent RX window. When set to 0, noACK
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)
The baud-rate for serial terminal display is 115200
app/LoRaMacLayerService.cpp
- Committer:
- ubhat
- Date:
- 2018-07-18
- Revision:
- 6:c5f2da0de0b0
- Parent:
- 0:42863a11464a
File content as of revision 6:c5f2da0de0b0:
/* / _____) _ | | ( (____ _____ ____ _| |_ _____ ____| |__ \____ \| ___ | (_ _) ___ |/ ___) _ \ _____) ) ____| | | || |_| ____( (___| | | | (______/|_____)_|_|_| \__)_____)\____)_| |_| (C)2015 Semtech Description: MAC Layer Services: MLME & MCPS License: Revised BSD License, see LICENSE.TXT file include in the project Maintainer: Uttam Bhat */ #include "LoRaMacLayerService.h" /*! * \brief MCPS-Confirm event function * * \param [IN] McpsConfirm - Pointer to the confirm structure, * containing confirm attributes. */ void McpsConfirm( McpsConfirm_t *McpsConfirm ) { if( McpsConfirm->Status == LORAMAC_EVENT_INFO_STATUS_OK ) { switch( McpsConfirm->McpsRequest ) { case MCPS_UNCONFIRMED: { // Check Datarate // Check TxPower break; } case MCPS_CONFIRMED: { // Check Datarate // Check TxPower // Check AckReceived // Check NbRetries LoRaMacUplinkStatus.Acked = McpsConfirm->AckReceived; break; } case MCPS_PROPRIETARY: { break; } default: break; } } LoRaMacUplinkStatus.Datarate = McpsConfirm->Datarate; LoRaMacUplinkStatus.UplinkCounter = McpsConfirm->UpLinkCounter; LoRaMacUplinkStatus.TxPower = McpsConfirm->TxPower; IsTxIntUpdate = true; } /*! * \brief MCPS-Indication event function * * \param [IN] McpsIndication - Pointer to the indication structure, * containing indication attributes. */ void McpsIndication( McpsIndication_t *McpsIndication ) { uint8_t port; if( McpsIndication->Status != LORAMAC_EVENT_INFO_STATUS_OK ) { return; } switch( McpsIndication->McpsIndication ) { case MCPS_UNCONFIRMED: { break; } case MCPS_CONFIRMED: { break; } case MCPS_PROPRIETARY: { break; } case MCPS_MULTICAST: { break; } default: break; } // Check Multicast // Check Port // Check Datarate // Check FramePending // Check Buffer // Check BufferSize // Check Rssi // Check Snr // Check RxSlot LoRaMacDownlinkStatus.Rssi = McpsIndication->Rssi; if( McpsIndication->Snr & 0x80 ) // The SNR sign bit is 1 { // Invert and divide by 4 LoRaMacDownlinkStatus.Snr = ( ( ~McpsIndication->Snr + 1 ) & 0xFF ) >> 2; LoRaMacDownlinkStatus.Snr = -LoRaMacDownlinkStatus.Snr; } else { // Divide by 4 LoRaMacDownlinkStatus.Snr = ( McpsIndication->Snr & 0xFF ) >> 2; } LoRaMacDownlinkStatus.DownlinkCounter++; LoRaMacDownlinkStatus.RxData = McpsIndication->RxData; LoRaMacDownlinkStatus.Port = McpsIndication->Port; LoRaMacDownlinkStatus.Buffer = McpsIndication->Buffer; LoRaMacDownlinkStatus.BufferSize = McpsIndication->BufferSize; LoRaMacDownlinkStatus.RxSlot = McpsIndication->RxSlot; if( ComplianceTest.Running == 1 ) { port = 224; ComplianceTest.DownLinkCounter++; } else { port = McpsIndication->Port; } if( McpsIndication->RxData == true ) { switch( port ) { case 1: // The application LED can be controlled on port 1 or 2 case 2: break; case 224: PrepareComplianceTestFrame( McpsIndication ); break; default: break; } } IsRxUpdate = true; } /*! * \brief MLME-Confirm event function * * \param [IN] MlmeConfirm - Pointer to the confirm structure, * containing confirm attributes. */ void MlmeConfirm( MlmeConfirm_t *MlmeConfirm ) { if( MlmeConfirm->Status == LORAMAC_EVENT_INFO_STATUS_OK ) { switch( MlmeConfirm->MlmeRequest ) { case MLME_JOIN: { // Status is OK, node has joined the network IsNetworkJoinedStatusUpdate = true; break; } case MLME_LINK_CHECK: { // Check DemodMargin // Check NbGateways if( ComplianceTest.Running == true ) { ComplianceTest.LinkCheck = true; ComplianceTest.DemodMargin = MlmeConfirm->DemodMargin; ComplianceTest.NbGateways = MlmeConfirm->NbGateways; } break; } default: break; } } // Schedule next packet transmission TimerSetValue( &TxNextPacketTimer, OVER_THE_AIR_ACTIVATION_DUTYCYCLE ); TimerStart( &TxNextPacketTimer ); DeviceState = DEVICE_STATE_SLEEP; }