File content as of revision 9:16106008960b:

/*
 / _____)             _              | |
( (____  _____ ____ _| |_ _____  ____| |__
 \____ \| ___ |    (_   _) ___ |/ ___)  _ \
 _____) ) ____| | | || |_| ____( (___| | | |
(______/|_____)_|_|_| \__)_____)\____)_| |_|
    (C)2015 Semtech

Description: LoRaMac classA device implementation

License: Revised BSD License, see LICENSE.TXT file include in the project

Maintainer: Miguel Luis and Gregory Cristian
*/
#include "mbed.h"
#include "board.h"
#include "radio.h"

#include "LoRaMac.h"
#include "Comissioning.h"
#include "SerialDisplay.h"
#include "DigitDisplay.h"
#include "ChainableLED.h"

Serial pc(USBTX, USBRX, 115200);

/*!
 * Defines the application data transmission duty cycle. 5s, value in [us].
 */
//#define APP_TX_DUTYCYCLE                            5000000
#define APP_TX_DUTYCYCLE                              60000000

/*!
 * Defines a random delay for application data transmission duty cycle. 1s,
 * value in [us].
 */
//#define APP_TX_DUTYCYCLE_RND                        1000000
#define APP_TX_DUTYCYCLE_RND                        10000000

/*!
 * Default datarate
 */
#define LORAWAN_DEFAULT_DATARATE                    DR_5

/*!
 * LoRaWAN confirmed messages
 */
#define LORAWAN_CONFIRMED_MSG_ON                    false

/*!
 * LoRaWAN Adaptive Data Rate
 *
 * \remark Please note that when ADR is enabled the end-device should be static
 */
#define LORAWAN_ADR_ON                              1

#if defined( USE_BAND_868 )

#include "LoRaMacTest.h"

/*!
 * LoRaWAN ETSI duty cycle control enable/disable
 *
 * \remark Please note that ETSI mandates duty cycled transmissions. Use only for test purposes
 */
#define LORAWAN_DUTYCYCLE_ON                        false

#define USE_SEMTECH_DEFAULT_CHANNEL_LINEUP          1

#if( USE_SEMTECH_DEFAULT_CHANNEL_LINEUP == 1 )

#define LC4                { 867100000, { ( ( DR_5 << 4 ) | DR_0 ) }, 0 }
#define LC5                { 867300000, { ( ( DR_5 << 4 ) | DR_0 ) }, 0 }
#define LC6                { 867500000, { ( ( DR_5 << 4 ) | DR_0 ) }, 0 }
#define LC7                { 867700000, { ( ( DR_5 << 4 ) | DR_0 ) }, 0 }
#define LC8                { 867900000, { ( ( DR_5 << 4 ) | DR_0 ) }, 0 }
#define LC9                { 868800000, { ( ( DR_7 << 4 ) | DR_7 ) }, 2 }
#define LC10               { 868300000, { ( ( DR_6 << 4 ) | DR_6 ) }, 1 }

#endif

#endif

/*!
 * LoRaWAN application port
 */
#define LORAWAN_APP_PORT                            10

/*!
 * User application data buffer size
 */
#if ( LORAWAN_CONFIRMED_MSG_ON == 1 )
#define LORAWAN_APP_DATA_SIZE                       6

#else
#define LORAWAN_APP_DATA_SIZE                       5

#endif

static uint8_t DevEui[] = LORAWAN_DEVICE_EUI;
static uint8_t AppEui[] = LORAWAN_APPLICATION_EUI;
static uint8_t AppKey[] = LORAWAN_APPLICATION_KEY;

#if( OVER_THE_AIR_ACTIVATION == 0 )

static uint8_t NwkSKey[] = LORAWAN_NWKSKEY;
static uint8_t AppSKey[] = LORAWAN_APPSKEY;

/*!
 * Device address
 */
static uint32_t DevAddr = LORAWAN_DEVICE_ADDRESS;

#endif

/*!
 * Application port
 */
static uint8_t AppPort = LORAWAN_APP_PORT;

/*!
 * User application data size
 */
static uint8_t AppDataSize = LORAWAN_APP_DATA_SIZE;

/*!
 * User application data buffer size
 */
#define LORAWAN_APP_DATA_MAX_SIZE                           64

/*!
 * User application data
 */
static uint8_t AppData[LORAWAN_APP_DATA_MAX_SIZE];

/*!
 * Indicates if the node is sending confirmed or unconfirmed messages
 */
static uint8_t IsTxConfirmed = LORAWAN_CONFIRMED_MSG_ON;

/*!
 * Defines the application data transmission duty cycle
 */
static uint32_t TxDutyCycleTime;

/*!
 * Timer to handle the application data transmission duty cycle
 */
static TimerEvent_t TxNextPacketTimer;

/*!
 * Specifies the state of the application LED
 */
static bool AppLedStateOn = false;
volatile bool Led3StateChanged = false;
/*!
 * Timer to handle the state of LED1
 */
static TimerEvent_t Led1Timer;
volatile bool Led1State = false;
volatile bool Led1StateChanged = false;
/*!
 * Timer to handle the state of LED2
 */
static TimerEvent_t Led2Timer;
volatile bool Led2State = false;
volatile bool Led2StateChanged = false;

/*!
 * Indicates if a new packet can be sent
 */
static bool NextTx = true;

/*!
 * Hold the value returned from the Light Sensor
 */
static float LightValue = 0.0;

/*!
 * Control the 3-color LED
 * 0: automatic (LED goes brigther as the light decrease,
 * 1: manual (The LED is controlled by the user)
 */
static uint8_t LightMode = 0;  // 0: automatic, 1: manual

/*!
 * Ticker to create a PWM for the buzzer
 */
Ticker BuzzerTimer;


/*!
 * Constructor for Buzzer
 */
DigitalOut Buzzer( A3 );

/*!
 * Constructor for the 3-color LED
 */
#define NUM_LED 3
ChainableLED ColorLed( D6, D7, NUM_LED );

/*!
 * Constructor for Light Sensor
 */
AnalogIn LightSens( A1 );

/*!
 * Constructor for 4 Digit 7 semgent display
 */
DigitDisplay Display( D8, D9 );

/*!
 * Device states
 */
static enum eDevicState {
    DEVICE_STATE_INIT,
    DEVICE_STATE_JOIN,
    DEVICE_STATE_SEND,
    DEVICE_STATE_CYCLE,
    DEVICE_STATE_SLEEP
} DeviceState;

/*!
 * LoRaWAN compliance tests support data
 */
struct ComplianceTest_s {
    bool Running;
    uint8_t State;
    bool IsTxConfirmed;
    uint8_t AppPort;
    uint8_t AppDataSize;
    uint8_t *AppDataBuffer;
    uint16_t DownLinkCounter;
    bool LinkCheck;
    uint8_t DemodMargin;
    uint8_t NbGateways;
} ComplianceTest;

/*
 * SerialDisplay managment variables
 */

/*!
 * Indicates if the MAC layer network join status has changed.
 */
static bool IsNetworkJoinedStatusUpdate = false;

/*!
 * Strucure containing the Uplink status
 */
struct sLoRaMacUplinkStatus {
    uint8_t Acked;
    int8_t Datarate;
    uint16_t UplinkCounter;
    uint8_t Port;
    uint8_t *Buffer;
    uint8_t BufferSize;
} LoRaMacUplinkStatus;
volatile bool UplinkStatusUpdated = false;

/*!
 * Strucure containing the Downlink status
 */
struct sLoRaMacDownlinkStatus {
    int16_t Rssi;
    int8_t Snr;
    uint16_t DownlinkCounter;
    bool RxData;
    uint8_t Port;
    uint8_t *Buffer;
    uint8_t BufferSize;
} LoRaMacDownlinkStatus;
volatile bool DownlinkStatusUpdated = false;

/*!
 * User Button to generate interupt and send messages
 */
InterruptIn userButton(USER_BUTTON);

void SerialDisplayRefresh( void )
{
    MibRequestConfirm_t mibReq;

    SerialDisplayInit( );
    SerialDisplayUpdateActivationMode( OVER_THE_AIR_ACTIVATION );

#if( OVER_THE_AIR_ACTIVATION == 0 )
    SerialDisplayUpdateNwkId( LORAWAN_NETWORK_ID );
    SerialDisplayUpdateDevAddr( DevAddr );
    SerialDisplayUpdateKey( 12, NwkSKey );
    SerialDisplayUpdateKey( 13, AppSKey );
#endif
    SerialDisplayUpdateEui( 5, DevEui );
    SerialDisplayUpdateEui( 6, AppEui );
    SerialDisplayUpdateKey( 7, AppKey );

    mibReq.Type = MIB_NETWORK_JOINED;
    LoRaMacMibGetRequestConfirm( &mibReq );
    SerialDisplayUpdateNetworkIsJoined( mibReq.Param.IsNetworkJoined );

    SerialDisplayUpdateAdr( LORAWAN_ADR_ON );
#if defined( USE_BAND_868 )
    SerialDisplayUpdateDutyCycle( LORAWAN_DUTYCYCLE_ON );
#else
    SerialDisplayUpdateDutyCycle( false );
#endif
    SerialDisplayUpdatePublicNetwork( LORAWAN_PUBLIC_NETWORK );

    SerialDisplayUpdateLedState( 3, AppLedStateOn );
}

void SerialRxProcess( void )
{
    if( SerialDisplayReadable( ) == true ) {
        switch( SerialDisplayGetChar( ) ) {
            case 'R':
            case 'r':
                // Refresh Serial screen
                SerialDisplayRefresh( );
                break;
            default:
                break;
        }
    }
}

/*!
 * \brief   Prepares the payload of the frame
 */
static void PrepareTxFrame( uint8_t port )
{
    switch( port ) {
        case 10: {
            int pos = 0;

            pc.printf("Prepare message\n");
#if 0
            uint32_t tempValue = ( uint32_t )( LightValue * 1000000.0 );
            AppData[0] = LightMode;
            AppData[1] = ( ( tempValue & 0xFF000000 ) >> 24 ) & 0xFF;
            AppData[2] = ( ( tempValue & 0x00FF0000 ) >> 16 ) & 0xFF;
            AppData[3] = ( ( tempValue & 0x0000FF00 ) >> 8 ) & 0xFF;
            AppData[4] = ( tempValue & 0x000000FF );
#else
            int err = 1;

            pc.printf("read dht ");
            for (int t = 0; t<5; t ++) {
                err = dhtSensor.readData();
                if (err == 0)
                    break;
            }
            if (err) {
                pc.printf("error: %d ", err);
                for (int i=0; i<4; i++)
                    AppData[pos++]  = 0xFF;
            } else {

                int16_t  humidity = dhtSensor.ReadHumidity()*100;
                int16_t temp = dhtSensor.ReadTemperature(CELCIUS) * 100;
                AppData[pos++]  = humidity  >> 8;
                AppData[pos++]  = humidity;
                AppData[pos++]  = temp >> 8;
                AppData[pos++]  = temp ;
            }


            pc.printf("read bmp ");
            bmpSensor.measure();
            int16_t pressure = bmpSensor.get_pressure();
            AppData[pos++]  = pressure  >> 8;
            AppData[pos++]  = pressure;
            int16_t temp = bmpSensor.get_temperature() * 100;
            AppData[pos++]  = temp >> 8;
            AppData[pos++]  = temp ;
            pc.printf("bmp: %d %d", pressure, temp);

            pc.printf("read sds ");
            sdsSensor.readData();
            int pm = sdsSensor.PM2_5() * 10;
            AppData[pos++]  = pm >> 8;
            AppData[pos++]  = pm;
            pm = sdsSensor.PM10() * 10;
            AppData[pos++]  = pm >> 8;
            AppData[pos++]  = pm;

            AppDataSize = pos;
            for (int i=0; i<pos; i++)
            { pc.printf("%02x ", AppData[i]);
            }
            pc.printf("\n");
#endif
            pc.printf("Message Ready\n");
        }
        break;
        case 15: {
            int pos = 0;
            AppData[pos++] = AppLedStateOn;
#if 0
            int err = 1;

            while(err != 0) {
                wait(2.0f);
//                err = dhtSensor.readData();
            }

            int16_t  humidity = dhtSensor.ReadHumidity()*100;
            AppData[pos++]  = humidity  >> 8;
            AppData[pos++]  = humidity;
            int16_t temp = dhtSensor.ReadTemperature(CELCIUS) * 100;
            AppData[pos++]  = temp >> 8;
            AppData[pos++]  = temp ;

//            bmpSensor.measure();
            int16_t pressure = bmpSensor.get_pressure();
            AppData[pos++]  = pressure  >> 8;
            AppData[pos++]  = pressure;
            temp = bmpSensor.get_temperature() * 100;
            AppData[pos++]  = temp >> 8;
            AppData[pos++]  = temp ;

//            sdsSensor.readData();
            int pm = sdsSensor.PM2_5() * 10;
            AppData[pos++]  = pm >> 8;
            AppData[pos++]  = pm;
            pm = sdsSensor.PM10() * 10;
            AppData[pos++]  = pm >> 8;
            AppData[pos++]  = pm;

            if( IsTxConfirmed == true ) {
                AppData[pos++] = LoRaMacDownlinkStatus.DownlinkCounter >> 8;
                AppData[pos++] = LoRaMacDownlinkStatus.DownlinkCounter;
                AppData[pos++] = LoRaMacDownlinkStatus.Rssi >> 8;
                AppData[pos++] = LoRaMacDownlinkStatus.Rssi;
                AppData[pos++] = LoRaMacDownlinkStatus.Snr;
            }
#endif
            AppDataSize = pos;
        }
        break;
        case 224:
            if( ComplianceTest.LinkCheck == true ) {
                ComplianceTest.LinkCheck = false;
                AppDataSize = 3;
                AppData[0] = 5;
                AppData[1] = ComplianceTest.DemodMargin;
                AppData[2] = ComplianceTest.NbGateways;
                ComplianceTest.State = 1;
            } else {
                switch( ComplianceTest.State ) {
                    case 4:
                        ComplianceTest.State = 1;
                        break;
                    case 1:
                        AppDataSize = 2;
                        AppData[0] = ComplianceTest.DownLinkCounter >> 8;
                        AppData[1] = ComplianceTest.DownLinkCounter;
                        break;
                }
            }
            break;
        default:
            break;
    }
}

/*!
 * \brief   Prepares the payload of the frame
 *
 * \retval  [0: frame could be send, 1: error]
 */
static bool SendFrame( void )
{
    McpsReq_t mcpsReq;
    LoRaMacTxInfo_t txInfo;

    if( LoRaMacQueryTxPossible( AppDataSize, &txInfo ) != LORAMAC_STATUS_OK ) {
        // Send empty frame in order to flush MAC commands
        mcpsReq.Type = MCPS_UNCONFIRMED;
        mcpsReq.Req.Unconfirmed.fBuffer = NULL;
        mcpsReq.Req.Unconfirmed.fBufferSize = 0;
        mcpsReq.Req.Unconfirmed.Datarate = LORAWAN_DEFAULT_DATARATE;

        LoRaMacUplinkStatus.Acked = false;
        LoRaMacUplinkStatus.Port = 0;
        LoRaMacUplinkStatus.Buffer = NULL;
        LoRaMacUplinkStatus.BufferSize = 0;
        SerialDisplayUpdateFrameType( false );
    } else {
        LoRaMacUplinkStatus.Acked = false;
        LoRaMacUplinkStatus.Port = AppPort;
        LoRaMacUplinkStatus.Buffer = AppData;
        LoRaMacUplinkStatus.BufferSize = AppDataSize;
        SerialDisplayUpdateFrameType( IsTxConfirmed );

        if( IsTxConfirmed == false ) {
            mcpsReq.Type = MCPS_UNCONFIRMED;
            mcpsReq.Req.Unconfirmed.fPort = AppPort;
            mcpsReq.Req.Unconfirmed.fBuffer = AppData;
            mcpsReq.Req.Unconfirmed.fBufferSize = AppDataSize;
            mcpsReq.Req.Unconfirmed.Datarate = LORAWAN_DEFAULT_DATARATE;
        } else {
            mcpsReq.Type = MCPS_CONFIRMED;
            mcpsReq.Req.Confirmed.fPort = AppPort;
            mcpsReq.Req.Confirmed.fBuffer = AppData;
            mcpsReq.Req.Confirmed.fBufferSize = AppDataSize;
            mcpsReq.Req.Confirmed.NbTrials = 8;
            mcpsReq.Req.Confirmed.Datarate = LORAWAN_DEFAULT_DATARATE;
        }
    }

    if( LoRaMacMcpsRequest( &mcpsReq ) == LORAMAC_STATUS_OK ) {
        return false;
    }
    return true;
}

/*!
 * \brief Function executed on TxNextPacket Timeout event
 */
static void OnTxNextPacketTimerEvent( void )
{
    MibRequestConfirm_t mibReq;
    LoRaMacStatus_t status;

    TimerStop( &TxNextPacketTimer );

    mibReq.Type = MIB_NETWORK_JOINED;
    status = LoRaMacMibGetRequestConfirm( &mibReq );

    if( status == LORAMAC_STATUS_OK ) {
        if( mibReq.Param.IsNetworkJoined == true ) {
            DeviceState = DEVICE_STATE_SEND;
            NextTx = true;
        } else {
            DeviceState = DEVICE_STATE_JOIN;
        }
    }
}

/*!
 * \brief Function executed on Led 1 Timeout event
 */
static void OnLed1TimerEvent( void )
{
    TimerStop( &Led1Timer );
    // Switch LED 1 OFF
    Led1State = false;
    Led1StateChanged = true;
}

/*!
 * \brief Function executed on Led 2 Timeout event
 */
static void OnLed2TimerEvent( void )
{
    TimerStop( &Led2Timer );
    // Switch LED 2 OFF
    Led2State = false;
    Led2StateChanged = true;
}

/*!
 * \brief Function executed on Buzzer Timeout event
 */
static void OnBuzzerTimerEvent( void )
{
    Buzzer = 0;
    BuzzerTimer.detach( );
}

/*!
 * \brief   MCPS-Confirm event function
 *
 * \param   [IN] mcpsConfirm - Pointer to the confirm structure,
 *               containing confirm attributes.
 */
static 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 NbTrials
                LoRaMacUplinkStatus.Acked = mcpsConfirm->AckReceived;
                break;
            }
            case MCPS_PROPRIETARY: {
                break;
            }
            default:
                break;
        }
        LoRaMacUplinkStatus.Datarate = mcpsConfirm->Datarate;
        LoRaMacUplinkStatus.UplinkCounter = mcpsConfirm->UpLinkCounter;

        // Switch LED 1 ON
        Led1State = true;
        Led1StateChanged = true;
        TimerStart( &Led1Timer );

        UplinkStatusUpdated = true;
    }
    NextTx = true;
}

/*!
 * \brief   MCPS-Indication event function
 *
 * \param   [IN] mcpsIndication - Pointer to the indication structure,
 *               containing indication attributes.
 */
static void McpsIndication( McpsIndication_t *mcpsIndication )
{
    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;

    if( ComplianceTest.Running == true ) {
        ComplianceTest.DownLinkCounter++;
    }

    if( mcpsIndication->RxData == true ) {
        switch( mcpsIndication->Port ) {
            case 1: // The application LED can be controlled on port 1 or 2
            case 2:
                if( mcpsIndication->BufferSize == 1 ) {
                    AppLedStateOn = mcpsIndication->Buffer[0] & 0x01;
                    Led3StateChanged = true;
                }
                break;
            case 10:
                Display.write( 0, mcpsIndication->Buffer[0] );
                Display.write( 1, mcpsIndication->Buffer[1] );
                Display.write( 2, mcpsIndication->Buffer[2] );
                Display.write( 3, mcpsIndication->Buffer[3] );
                break;
            case 20:
                LightMode = mcpsIndication->Buffer[0];
                if( LightMode ) {
                    ColorLed.setColorRGB( 0, mcpsIndication->Buffer[1], mcpsIndication->Buffer[2], mcpsIndication->Buffer[3] );
                }
                break;
            case 30:
                BuzzerTimer.attach_us( &OnBuzzerTimerEvent, 200000 );
                Buzzer = 1;
                break;
            case 224:
                if( ComplianceTest.Running == false ) {
                    // Check compliance test enable command (i)
                    if( ( mcpsIndication->BufferSize == 4 ) &&
                            ( mcpsIndication->Buffer[0] == 0x01 ) &&
                            ( mcpsIndication->Buffer[1] == 0x01 ) &&
                            ( mcpsIndication->Buffer[2] == 0x01 ) &&
                            ( mcpsIndication->Buffer[3] == 0x01 ) ) {
                        IsTxConfirmed = false;
                        AppPort = 224;
                        AppDataSize = 2;
                        ComplianceTest.DownLinkCounter = 0;
                        ComplianceTest.LinkCheck = false;
                        ComplianceTest.DemodMargin = 0;
                        ComplianceTest.NbGateways = 0;
                        ComplianceTest.Running = true;
                        ComplianceTest.State = 1;

                        MibRequestConfirm_t mibReq;
                        mibReq.Type = MIB_ADR;
                        mibReq.Param.AdrEnable = true;
                        LoRaMacMibSetRequestConfirm( &mibReq );

#if defined( USE_BAND_868 )
                        LoRaMacTestSetDutyCycleOn( false );
#endif
                    }
                } else {
                    ComplianceTest.State = mcpsIndication->Buffer[0];
                    switch( ComplianceTest.State ) {
                        case 0: // Check compliance test disable command (ii)
                            IsTxConfirmed = LORAWAN_CONFIRMED_MSG_ON;
                            AppPort = LORAWAN_APP_PORT;
                            AppDataSize = LORAWAN_APP_DATA_SIZE;
                            ComplianceTest.DownLinkCounter = 0;
                            ComplianceTest.Running = false;

                            MibRequestConfirm_t mibReq;
                            mibReq.Type = MIB_ADR;
                            mibReq.Param.AdrEnable = LORAWAN_ADR_ON;
                            LoRaMacMibSetRequestConfirm( &mibReq );
#if defined( USE_BAND_868 )
                            LoRaMacTestSetDutyCycleOn( LORAWAN_DUTYCYCLE_ON );
#endif
                            break;
                        case 1: // (iii, iv)
                            AppDataSize = 2;
                            break;
                        case 2: // Enable confirmed messages (v)
                            IsTxConfirmed = true;
                            ComplianceTest.State = 1;
                            break;
                        case 3:  // Disable confirmed messages (vi)
                            IsTxConfirmed = false;
                            ComplianceTest.State = 1;
                            break;
                        case 4: // (vii)
                            AppDataSize = mcpsIndication->BufferSize;

                            AppData[0] = 4;
                            for( uint8_t i = 1; i < AppDataSize; i++ ) {
                                AppData[i] = mcpsIndication->Buffer[i] + 1;
                            }
                            break;
                        case 5: { // (viii)
                            MlmeReq_t mlmeReq;
                            mlmeReq.Type = MLME_LINK_CHECK;
                            LoRaMacMlmeRequest( &mlmeReq );
                        }
                        break;
                        case 6: { // (ix)
                            MlmeReq_t mlmeReq;

                            mlmeReq.Type = MLME_JOIN;

                            mlmeReq.Req.Join.DevEui = DevEui;
                            mlmeReq.Req.Join.AppEui = AppEui;
                            mlmeReq.Req.Join.AppKey = AppKey;

                            LoRaMacMlmeRequest( &mlmeReq );
                            DeviceState = DEVICE_STATE_SLEEP;
                        }
                        break;
                        default:
                            break;
                    }
                }
                break;
            default:
                break;
        }
    }

    // Switch LED 2 ON for each received downlink
    Led2State = true;
    Led2StateChanged = true;
    TimerStart( &Led2Timer );
    DownlinkStatusUpdated = true;
}

/*!
 * \brief   MLME-Confirm event function
 *
 * \param   [IN] mlmeConfirm - Pointer to the confirm structure,
 *               containing confirm attributes.
 */
static 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;
                DeviceState = DEVICE_STATE_SEND;
                NextTx = 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;
        }
    }
    NextTx = true;
    UplinkStatusUpdated = true;
}

/*!
 * \brief Function executed when user button is pressed
 */
void buttonPressed()
{
    pc.printf("Button pressed\n");
    DeviceState = DEVICE_STATE_SEND;
}

/**
 * Main application entry point.
 */
int main( void )
{
    pc.printf("main entry\n");
    LoRaMacPrimitives_t LoRaMacPrimitives;
    LoRaMacCallback_t LoRaMacCallbacks;
    MibRequestConfirm_t mibReq;

    pc.printf("Board init");
    BoardInit( );
    pc.printf("Serial display");
    SerialDisplayInit( );

    LightMode = 0;      // 0: manual,   1: automatic
    Buzzer = 0;         // 0: OFF,      1: ON

    SerialDisplayUpdateEui( 5, DevEui );
    SerialDisplayUpdateEui( 6, AppEui );
    SerialDisplayUpdateKey( 7, AppKey );

#if( OVER_THE_AIR_ACTIVATION == 0 )
    SerialDisplayUpdateNwkId( LORAWAN_NETWORK_ID );
    SerialDisplayUpdateDevAddr( DevAddr );
    SerialDisplayUpdateKey( 12, NwkSKey );
    SerialDisplayUpdateKey( 13, AppSKey );
#endif

    userButton.fall(&buttonPressed);

    DeviceState = DEVICE_STATE_INIT;

    while( 1 ) {
        SerialRxProcess( );
        if( IsNetworkJoinedStatusUpdate == true ) {
            IsNetworkJoinedStatusUpdate = false;
            mibReq.Type = MIB_NETWORK_JOINED;
            LoRaMacMibGetRequestConfirm( &mibReq );
            SerialDisplayUpdateNetworkIsJoined( mibReq.Param.IsNetworkJoined );
        }
        if( Led1StateChanged == true ) {
            Led1StateChanged = false;
            SerialDisplayUpdateLedState( 1, Led1State );
        }
        if( Led2StateChanged == true ) {
            Led2StateChanged = false;
            SerialDisplayUpdateLedState( 2, Led2State );
        }
        if( Led3StateChanged == true ) {
            Led3StateChanged = false;
            SerialDisplayUpdateLedState( 3, AppLedStateOn );
        }
        if( UplinkStatusUpdated == true ) {
            UplinkStatusUpdated = false;
            SerialDisplayUpdateUplink( LoRaMacUplinkStatus.Acked, LoRaMacUplinkStatus.Datarate, LoRaMacUplinkStatus.UplinkCounter, LoRaMacUplinkStatus.Port, LoRaMacUplinkStatus.Buffer, LoRaMacUplinkStatus.BufferSize );
        }
        if( DownlinkStatusUpdated == true ) {
            DownlinkStatusUpdated = false;
            SerialDisplayUpdateLedState( 2, Led2State );
            SerialDisplayUpdateDownlink( LoRaMacDownlinkStatus.RxData, LoRaMacDownlinkStatus.Rssi, LoRaMacDownlinkStatus.Snr, LoRaMacDownlinkStatus.DownlinkCounter, LoRaMacDownlinkStatus.Port, LoRaMacDownlinkStatus.Buffer, LoRaMacDownlinkStatus.BufferSize );
        }

        switch( DeviceState ) {
            case DEVICE_STATE_INIT: {
                pc.printf("DEVICE_STATE_INIT\n");
                LoRaMacPrimitives.MacMcpsConfirm = McpsConfirm;
                LoRaMacPrimitives.MacMcpsIndication = McpsIndication;
                LoRaMacPrimitives.MacMlmeConfirm = MlmeConfirm;
                LoRaMacCallbacks.GetBatteryLevel = BoardGetBatteryLevel;
                LoRaMacInitialization( &LoRaMacPrimitives, &LoRaMacCallbacks );

                TimerInit( &TxNextPacketTimer, OnTxNextPacketTimerEvent );

                TimerInit( &Led1Timer, OnLed1TimerEvent );
                TimerSetValue( &Led1Timer, 25000 );

                TimerInit( &Led2Timer, OnLed2TimerEvent );
                TimerSetValue( &Led2Timer, 25000 );

                mibReq.Type = MIB_ADR;
                mibReq.Param.AdrEnable = LORAWAN_ADR_ON;
                LoRaMacMibSetRequestConfirm( &mibReq );

                mibReq.Type = MIB_PUBLIC_NETWORK;
                mibReq.Param.EnablePublicNetwork = LORAWAN_PUBLIC_NETWORK;
                LoRaMacMibSetRequestConfirm( &mibReq );

#if defined( USE_BAND_868 )
                LoRaMacTestSetDutyCycleOn( LORAWAN_DUTYCYCLE_ON );
                SerialDisplayUpdateDutyCycle( LORAWAN_DUTYCYCLE_ON );

#if( USE_SEMTECH_DEFAULT_CHANNEL_LINEUP == 1 )
                LoRaMacChannelAdd( 3, ( ChannelParams_t )LC4 );
                LoRaMacChannelAdd( 4, ( ChannelParams_t )LC5 );
                LoRaMacChannelAdd( 5, ( ChannelParams_t )LC6 );
                LoRaMacChannelAdd( 6, ( ChannelParams_t )LC7 );
                LoRaMacChannelAdd( 7, ( ChannelParams_t )LC8 );
                LoRaMacChannelAdd( 8, ( ChannelParams_t )LC9 );
                LoRaMacChannelAdd( 9, ( ChannelParams_t )LC10 );

                mibReq.Type = MIB_RX2_CHANNEL;
                mibReq.Param.Rx2Channel = ( Rx2ChannelParams_t ) {
                    869525000, DR_3
                };
                LoRaMacMibSetRequestConfirm( &mibReq );
#endif

#endif
                SerialDisplayUpdateActivationMode( OVER_THE_AIR_ACTIVATION );
                SerialDisplayUpdateAdr( LORAWAN_ADR_ON );
                SerialDisplayUpdatePublicNetwork( LORAWAN_PUBLIC_NETWORK );

                LoRaMacDownlinkStatus.DownlinkCounter = 0;

                DeviceState = DEVICE_STATE_JOIN;
                break;
            }
            case DEVICE_STATE_JOIN: {
                pc.printf("DEVICE_STATE_JOIN\n");
#if( OVER_THE_AIR_ACTIVATION != 0 )
                MlmeReq_t mlmeReq;

                mlmeReq.Type = MLME_JOIN;

                mlmeReq.Req.Join.DevEui = DevEui;
                mlmeReq.Req.Join.AppEui = AppEui;
                mlmeReq.Req.Join.AppKey = AppKey;

                if( NextTx == true ) {
                    LoRaMacMlmeRequest( &mlmeReq );
                }
                DeviceState = DEVICE_STATE_SLEEP;
#else
                mibReq.Type = MIB_NET_ID;
                mibReq.Param.NetID = LORAWAN_NETWORK_ID;
                LoRaMacMibSetRequestConfirm( &mibReq );

                mibReq.Type = MIB_DEV_ADDR;
                mibReq.Param.DevAddr = DevAddr;
                LoRaMacMibSetRequestConfirm( &mibReq );

                mibReq.Type = MIB_NWK_SKEY;
                mibReq.Param.NwkSKey = NwkSKey;
                LoRaMacMibSetRequestConfirm( &mibReq );

                mibReq.Type = MIB_APP_SKEY;
                mibReq.Param.AppSKey = AppSKey;
                LoRaMacMibSetRequestConfirm( &mibReq );

                mibReq.Type = MIB_NETWORK_JOINED;
                mibReq.Param.IsNetworkJoined = true;
                LoRaMacMibSetRequestConfirm( &mibReq );

                DeviceState = DEVICE_STATE_SEND;
#endif
                IsNetworkJoinedStatusUpdate = true;
                break;
            }
            case DEVICE_STATE_SEND: {
                pc.printf("DEVICE_STATE_SEND\n");
                if( NextTx == true ) {
                    SerialDisplayUpdateUplinkAcked( false );
                    SerialDisplayUpdateDonwlinkRxData( false );
                    PrepareTxFrame( AppPort );

                    NextTx = SendFrame( );
                }
                if( ComplianceTest.Running == true ) {
                    // Schedule next packet transmission
                    TxDutyCycleTime = 5000000; // 5000000 us
                } else {
                    // Schedule next packet transmission
                    TxDutyCycleTime = APP_TX_DUTYCYCLE + randr( -APP_TX_DUTYCYCLE_RND, APP_TX_DUTYCYCLE_RND );
                }
                DeviceState = DEVICE_STATE_CYCLE;
                break;
            }
            case DEVICE_STATE_CYCLE: {
                pc.printf("DEVICE_STATE_CYCLE\n");
                DeviceState = DEVICE_STATE_SLEEP;

                // Schedule next packet transmission
                TimerSetValue( &TxNextPacketTimer, TxDutyCycleTime );
                TimerStart( &TxNextPacketTimer );
                break;
            }
            case DEVICE_STATE_SLEEP: {
//                pc.printf("DEVICE_STATE_SLEEP\n");
                // Wake up through events
                break;
            }
            default: {
                DeviceState = DEVICE_STATE_INIT;
                break;
            }

        }

        // Read light sensor
        LightValue = ( 1 - ( LightSens.read( ) * 1.65 ) );

        // Set automatic RGB from light sensor
        if( LightMode == 0 ) {
            ColorLed.setColorRGB( 0, ( uint8_t )( 255 * LightValue ), ( uint8_t )( 255 * LightValue ), ( uint8_t )( 255 * LightValue ) );
        }
    }
}