MÓDULOS E KITS LoRa/LoRaWAN, LoRa MESH - PRIMEIROS PASSOS: julho 2022

O objetivo geral deste BLOG é demonstrar como é possível programar o módulo WISOL LOM204A02 via VISUINO e assim utilizá-lo como OPENCPU.

O objetivo específico neste projeto é programar o LOM204A02 com VISUINO, para permitir que seu NINA W106 (Master) possa efetuar um comunicação bidirecional (Topologia P2P) com vários NINA W106 (Slaves). Foi utilizado o recurso do VISUINO: Custom Code, o qual permite a inclusão de código Arduino, baseado nos exemplos Arduino da Library LMIC.

p2p

Uma comunicação peer-to-peer usando a tecnologia LoRa permite uma comunicação direta e de longa distância entre 2/n dispositivos (Polling). Isso é particularmente útil em ambientes restritos onde a infraestrutura global LoraWAN não é necessária ou simplesmente não está disponível.

Protocolo de Comunicação

Comunicação Bidirecional

Basicamente o Master enviará um pacote o LOM204A02 e este fará um broadcasting para todos os Slaves.

Este pacote será um JSON que conterá um Id do Slave com o qual ele deseja se comunicar:

{"Id":0,"ALARM":0}, onde X é Id do Slave, que no caso será 0,1,2,3...em Alarm você já pode enviar também dado para o Slave do Id selecionado processar.

O Slave que corresponde à este Id, poderá enviar uma resposta através de um pacote JSON também:

{"ID":0,"A0":26,"A1":0,"A2":0,"A3":1023,"D0":0,"D1":0,"D2":0,"D3":0,"C":54761,"T":26,"U":59,"P":102028

Também via Broadcasting, o pacote enviado pelo Slave chegará ao Master, mas também para os outros Slaves o qual deverá ser descartado observando seu Id.

Para o NINA W106 (Master ou Slave) fazer um broadcasting, dever enviar (Txd) via Serial o pacote até o RX5 do LOM204.

Para o NINA W106 (Master ou Slave) receber (Rxd) um broadcasting, deve ser conectando a Serial no TX1 do LOM204.

NINA W106 MASTER e SLAVE

LOM204 atuando como Broadcasting

EVK e BREAKOUT LOM204

Testado no STARTER KIT LOM204 e também no Breakout LOM204

Kit de avaliação para módulo LoRa Wisol LOM204A02 rede LoRaWAN e P2P - EVBLOM204A02 - SmartCore - one stop shop para fabricantes de soluções em IoT, rastreamento, telemetria e conectividade

VISUINO

O Visuino é o mais recente software inovador da Mitov Software. Um ambiente de programação visual que permite programar suas placas Arduino.

Os componentes encontrados no software Visuino representam seus componentes de hardware e você poderá criar e projetar facilmente seus programas usando arrastar e soltar. Nenhum equipamento ou hardware é necessário para executar o software no modo de design. Depois de ter concluído o design, você pode conectar o upload da placa Arduino e executá-lo.

Para aquelas pessoas que não são fortes em escrever código, em seguida, projetar, compilar e criar programas Arduino nunca foi tão fácil! Por que perder tempo criando código quando já se faz todo o trabalho duro para você? Você tem sua placa Arduino e um ótimo design de hardware, veja-a rodando em minutos, não em horas!

ARDUINO

O que é Arduino? Se você sabe pouco sobre Arduino, por favor dê uma olhada abaixo:

https://www.arduino.cc/

Você conhece Arduino. Instale o IDE primeiro:
https://www.arduino.cc/en/Main/Software

LOM204 e Arduino

LOM204 é baseado em STM32L071. No Arduino STM32 existe este core.

Como instalar Arduino STM32?

adicionar em Arquivo Preferências URLs adicionais

http://github.com/stm32duino/BoardManagerFiles/raw/main/package_stmicroelectronics_index.json

BSP (utilizar 2.2.0)

Em seguida, instale o BSP para STM32. Se a instalação estiver concluída como segue:

LIB LoraWAN para Arduino - LMIC (Catena)

Baixe a biblioteca LoRaWAN de:
mcci-catena/arduino-lmic: LoraWAN-MAC-in-C library, adapted to run under the Arduino environment (github.com)

Adicione ao Arduino IDE:

Ok, a LIB está instalada para ser acessada pelo Visuino.

Defina a Região

lmic_project_config.h

// project-specific definitions
//#define CFG_eu868 1
//#define CFG_us915 1
#define CFG_au915 1
//#define CFG_as923 1
// #define LMIC_COUNTRY_CODE LMIC_COUNTRY_CODE_JP   /* for as923-JP */
//#define CFG_kr920 1
//#define CFG_in866 1
#define CFG_sx1276_radio 1
//#define LMIC_USE_INTERRUPTS

No PACKAGE do STM32, alguns arquivos tiveram que ser alterados para ter acesso aos GPIOS do LOM204.

C:\Users\Usuario\AppData\Local\Arduino15\packages\STMicroelectronics\hardware\stm32\2.2.0\variants\STM32L0xx

Descompacte

SmartCore - Arduino_Lom204 - All Documents (sharepoint.com)

C:\Users\Usuario\AppData\Local\Arduino15\packages

Tem-se então em variants, uma placa LOM204

O projeto do Visuino (Componente Custom), foi baseado no exemplo P2p Raw.

/*******************************************************************************
 * Copyright (c) 2015 Matthijs Kooijman
 * Copyright (c) 2018 Terry Moore, MCCI Corporation
 *
 * Permission is hereby granted, free of charge, to anyone
 * obtaining a copy of this document and accompanying files,
 * to do whatever they want with them without any restriction,
 * including, but not limited to, copying, modification and redistribution.
 * NO WARRANTY OF ANY KIND IS PROVIDED.
 *
 * This example transmits data on hardcoded channel and receives data
 * when not transmitting. Running this sketch on two nodes should allow
 * them to communicate.
 *******************************************************************************/

#include <lmic.h>
#include <hal/hal.h>
#include <SPI.h>

// we formerly would check this configuration; but now there is a flag,
// in the LMIC, LMIC.noRXIQinversion;
// if we set that during init, we get the same effect.  If
// DISABLE_INVERT_IQ_ON_RX is defined, it means that LMIC.noRXIQinversion is
// treated as always set.
//
// #if !defined(DISABLE_INVERT_IQ_ON_RX)
// #error This example requires DISABLE_INVERT_IQ_ON_RX to be set. Update \
//        lmic_project_config.h in arduino-lmic/project_config to set it.
// #endif

// How often to send a packet. Note that this sketch bypasses the normal
// LMIC duty cycle limiting, so when you change anything in this sketch
// (payload length, frequency, spreading factor), be sure to check if
// this interval should not also be increased.
// See this spreadsheet for an easy airtime and duty cycle calculator:
// https://docs.google.com/spreadsheets/d/1voGAtQAjC1qBmaVuP1ApNKs1ekgUjavHuVQIXyYSvNc
#define TX_INTERVAL 2000

// Pin mapping
const lmic_pinmap lmic_pins = {
    .nss = 6,
    .rxtx = LMIC_UNUSED_PIN,
    .rst = 5,
    .dio = {2, 3, 4},
};


// These callbacks are only used in over-the-air activation, so they are
// left empty here (we cannot leave them out completely unless
// DISABLE_JOIN is set in arduino-lmoc/project_config/lmic_project_config.h,
// otherwise the linker will complain).
void os_getArtEui (u1_t* buf) { }
void os_getDevEui (u1_t* buf) { }
void os_getDevKey (u1_t* buf) { }

void onEvent (ev_t ev) {
}

osjob_t txjob;
osjob_t timeoutjob;
static void tx_func (osjob_t* job);

// Transmit the given string and call the given function afterwards
void tx(const char *str, osjobcb_t func) {
  os_radio(RADIO_RST); // Stop RX first
  delay(1); // Wait a bit, without this os_radio below asserts, apparently because the state hasn't changed yet
  LMIC.dataLen = 0;
  while (*str)
    LMIC.frame[LMIC.dataLen++] = *str++;
  LMIC.osjob.func = func;
  os_radio(RADIO_TX);
  Serial.println("TX");
}

// Enable rx mode and call func when a packet is received
void rx(osjobcb_t func) {
  LMIC.osjob.func = func;
  LMIC.rxtime = os_getTime(); // RX _now_
  // Enable "continuous" RX (e.g. without a timeout, still stops after
  // receiving a packet)
  os_radio(RADIO_RXON);
  Serial.println("RX");
}

static void rxtimeout_func(osjob_t *job) {
  digitalWrite(LED_BUILTIN, LOW); // off
}

static void rx_func (osjob_t* job) {
  // Blink once to confirm reception and then keep the led on
  digitalWrite(LED_BUILTIN, LOW); // off
  delay(10);
  digitalWrite(LED_BUILTIN, HIGH); // on

  // Timeout RX (i.e. update led status) after 3 periods without RX
  os_setTimedCallback(&timeoutjob, os_getTime() + ms2osticks(3*TX_INTERVAL), rxtimeout_func);

  // Reschedule TX so that it should not collide with the other side's
  // next TX
  os_setTimedCallback(&txjob, os_getTime() + ms2osticks(TX_INTERVAL/2), tx_func);

  Serial.print("Got ");
  Serial.print(LMIC.dataLen);
  Serial.println(" bytes");
  Serial.write(LMIC.frame, LMIC.dataLen);
  Serial.println();

  // Restart RX
  rx(rx_func);
}

static void txdone_func (osjob_t* job) {
  rx(rx_func);
}

// log text to USART and toggle LED
static void tx_func (osjob_t* job) {
  // say hello
  tx("Hello, world!", txdone_func);
  // reschedule job every TX_INTERVAL (plus a bit of random to prevent
  // systematic collisions), unless packets are received, then rx_func
  // will reschedule at half this time.
  os_setTimedCallback(job, os_getTime() + ms2osticks(TX_INTERVAL + random(500)), tx_func);
}

// application entry point
void setup() {
  Serial.begin(115200);
  Serial.println("Starting");
  #ifdef VCC_ENABLE
  // For Pinoccio Scout boards
  pinMode(VCC_ENABLE, OUTPUT);
  digitalWrite(VCC_ENABLE, HIGH);
  delay(1000);
  #endif

  pinMode(LED_BUILTIN, OUTPUT);

  // initialize runtime env
  os_init();

#if defined(CFG_eu868)
  // Use a frequency in the g3 which allows 10% duty cycling.
  LMIC.freq = 869525000;
  // Use a medium spread factor. This can be increased up to SF12 for
  // better range, but then, the interval should be (significantly)
  // raised to comply with duty cycle limits as well.
  LMIC.datarate = DR_SF9;
  // Maximum TX power
  LMIC.txpow = 27;
#elif defined(CFG_us915)
  // make it easier for test, by pull the parameters up to the top of the
  // block. Ideally, we'd use the serial port to drive this; or have
  // a voting protocol where one side is elected the controller and
  // guides the responder through all the channels, powers, ramps
  // the transmit power from min to max, and measures the RSSI and SNR.
  // Even more amazing would be a scheme where the controller could
  // handle multiple nodes; in that case we'd have a way to do
  // production test and qualification. However, using an RWC5020A
  // is a much better use of development time.

  // set fDownlink true to use a downlink channel; false
  // to use an uplink channel. Generally speaking, uplink
  // is more interesting, because you can prove that gateways
  // *should* be able to hear you.
  const static bool fDownlink = false;

  // the downlink channel to be used.
  const static uint8_t kDownlinkChannel = 3;

  // the uplink channel to be used.
  const static uint8_t kUplinkChannel = 8 + 3;

  // this is automatically set to the proper bandwidth in kHz,
  // based on the selected channel.
  uint32_t uBandwidth;

  if (! fDownlink)
        {
        if (kUplinkChannel < 64)
                {
                LMIC.freq = US915_125kHz_UPFBASE +
                            kUplinkChannel * US915_125kHz_UPFSTEP;
                uBandwidth = 125;
                }
        else
                {
                LMIC.freq = US915_500kHz_UPFBASE +
                            (kUplinkChannel - 64) * US915_500kHz_UPFSTEP;
                uBandwidth = 500;
                }
        }
  else
        {
        // downlink channel
        LMIC.freq = US915_500kHz_DNFBASE +
                    kDownlinkChannel * US915_500kHz_DNFSTEP;
        uBandwidth = 500;
        }

  // Use a suitable spreading factor
  if (uBandwidth < 500)
        LMIC.datarate = US915_DR_SF7;         // DR4
  else
        LMIC.datarate = US915_DR_SF12CR;      // DR8

  // default tx power for US: 21 dBm
  LMIC.txpow = 21;
#elif defined(CFG_au915)
  // make it easier for test, by pull the parameters up to the top of the
  // block. Ideally, we'd use the serial port to drive this; or have
  // a voting protocol where one side is elected the controller and
  // guides the responder through all the channels, powers, ramps
  // the transmit power from min to max, and measures the RSSI and SNR.
  // Even more amazing would be a scheme where the controller could
  // handle multiple nodes; in that case we'd have a way to do
  // production test and qualification. However, using an RWC5020A
  // is a much better use of development time.

  // set fDownlink true to use a downlink channel; false
  // to use an uplink channel. Generally speaking, uplink
  // is more interesting, because you can prove that gateways
  // *should* be able to hear you.
  const static bool fDownlink = false;

  // the downlink channel to be used.
  const static uint8_t kDownlinkChannel = 3;

  // the uplink channel to be used.
  const static uint8_t kUplinkChannel = 8 + 3;

  // this is automatically set to the proper bandwidth in kHz,
  // based on the selected channel.
  uint32_t uBandwidth;

  if (! fDownlink)
        {
        if (kUplinkChannel < 64)
                {
                LMIC.freq = AU915_125kHz_UPFBASE +
                            kUplinkChannel * AU915_125kHz_UPFSTEP;
                uBandwidth = 125;
                }
        else
                {
                LMIC.freq = AU915_500kHz_UPFBASE +
                            (kUplinkChannel - 64) * AU915_500kHz_UPFSTEP;
                uBandwidth = 500;
                }
        }
  else
        {
        // downlink channel
        LMIC.freq = AU915_500kHz_DNFBASE +
                    kDownlinkChannel * AU915_500kHz_DNFSTEP;
        uBandwidth = 500;
        }

  // Use a suitable spreading factor
  if (uBandwidth < 500)
        LMIC.datarate = AU915_DR_SF7;         // DR4
  else
        LMIC.datarate = AU915_DR_SF12CR;      // DR8

  // default tx power for AU: 30 dBm
  LMIC.txpow = 30;
#elif defined(CFG_as923)
// make it easier for test, by pull the parameters up to the top of the
// block. Ideally, we'd use the serial port to drive this; or have
// a voting protocol where one side is elected the controller and
// guides the responder through all the channels, powers, ramps
// the transmit power from min to max, and measures the RSSI and SNR.
// Even more amazing would be a scheme where the controller could
// handle multiple nodes; in that case we'd have a way to do
// production test and qualification. However, using an RWC5020A
// is a much better use of development time.
        const static uint8_t kChannel = 0;
        uint32_t uBandwidth;

        LMIC.freq = AS923_F1 + kChannel * 200000;
        uBandwidth = 125;

        // Use a suitable spreading factor
        if (uBandwidth == 125)
                LMIC.datarate = AS923_DR_SF7;         // DR7
        else
                LMIC.datarate = AS923_DR_SF7B;        // DR8

        // default tx power for AS: 21 dBm
        LMIC.txpow = 16;

        if (LMIC_COUNTRY_CODE == LMIC_COUNTRY_CODE_JP)
                {
                LMIC.lbt_ticks = us2osticks(AS923JP_LBT_US);
                LMIC.lbt_dbmax = AS923JP_LBT_DB_MAX;
                }
#elif defined(CFG_kr920)
// make it easier for test, by pull the parameters up to the top of the
// block. Ideally, we'd use the serial port to drive this; or have
// a voting protocol where one side is elected the controller and
// guides the responder through all the channels, powers, ramps
// the transmit power from min to max, and measures the RSSI and SNR.
// Even more amazing would be a scheme where the controller could
// handle multiple nodes; in that case we'd have a way to do
// production test and qualification. However, using an RWC5020A
// is a much better use of development time.
        const static uint8_t kChannel = 0;
        uint32_t uBandwidth;

        LMIC.freq = KR920_F1 + kChannel * 200000;
        uBandwidth = 125;

        LMIC.datarate = KR920_DR_SF7;         // DR7
        // default tx power for KR: 14 dBm
        LMIC.txpow = KR920_TX_EIRP_MAX_DBM;
        if (LMIC.freq < KR920_F14DBM)
          LMIC.txpow = KR920_TX_EIRP_MAX_DBM_LOW;

        LMIC.lbt_ticks = us2osticks(KR920_LBT_US);
        LMIC.lbt_dbmax = KR920_LBT_DB_MAX;
#elif defined(CFG_in866)
// make it easier for test, by pull the parameters up to the top of the
// block. Ideally, we'd use the serial port to drive this; or have
// a voting protocol where one side is elected the controller and
// guides the responder through all the channels, powers, ramps
// the transmit power from min to max, and measures the RSSI and SNR.
// Even more amazing would be a scheme where the controller could
// handle multiple nodes; in that case we'd have a way to do
// production test and qualification. However, using an RWC5020A
// is a much better use of development time.
        const static uint8_t kChannel = 0;
        uint32_t uBandwidth;

        LMIC.freq = IN866_F1 + kChannel * 200000;
        uBandwidth = 125;

        LMIC.datarate = IN866_DR_SF7;         // DR7
        // default tx power for IN: 30 dBm
        LMIC.txpow = IN866_TX_EIRP_MAX_DBM;
#else
# error Unsupported LMIC regional configuration.
#endif


  // disable RX IQ inversion
  LMIC.noRXIQinversion = true;

  // This sets CR 4/5, BW125 (except for EU/AS923 DR_SF7B, which uses BW250)
  LMIC.rps = updr2rps(LMIC.datarate);

  Serial.print("Frequency: "); Serial.print(LMIC.freq / 1000000);
            Serial.print("."); Serial.print((LMIC.freq / 100000) % 10);
            Serial.print("MHz");
  Serial.print("  LMIC.datarate: "); Serial.print(LMIC.datarate);
  Serial.print("  LMIC.txpow: "); Serial.println(LMIC.txpow);

  // This sets CR 4/5, BW125 (except for DR_SF7B, which uses BW250)
  LMIC.rps = updr2rps(LMIC.datarate);

  // disable RX IQ inversion
  LMIC.noRXIQinversion = true;

  Serial.println("Started");
  Serial.flush();

  // setup initial job
  os_setCallback(&txjob, tx_func);
}

void loop() {
  // execute scheduled jobs and events
  os_runloop_once();
}

Gravador para utilizar com Visuino

Instale o STM32 Cube Programmer, o Arduino (STM32 PACKAGE) irá reconhecê-lo e então utilizá-lo para programar o LOM204. O Kit LOM204 possui um gravador ST-LINK embarcado.

Caso não tenhas um Kit LOM204 ou seja, apenas um módulo, utilize o um ST-LINK V2

st-link v2 - Bing images

O autor utilizou o ST-LINK.

Baixe o VISUINO PRO e instale

Visuino - Visual Development for Arduino by Mitov Software

Foi Criado, não oficialmente , um VCOMP (Virtual Component) para o LOM204, o qual pode ser baixado aqui.

https://ricardoadulis.sharepoint.com/:u:/s/smartcore/ERMTOUa-qIlLg8HaMSEqA-YBibmxnRb_msv6Zjzmpx4sng?e=vGpNjv

Copie para a PASTA

C:\Users\Usuario\Documents\Arduino\libraries\Mitov\Visuino

Projeto VISUINO

lora_p2p_modbus_device.visuino

Abra o projeto!

Atenção, o VISUINO instalará o SDK "STM32" em

C:\Users\Usuario\AppData\Local\Arduino15\packages

Podes apagar, deixe o baixado pela IDE do Arduino, para que faça referência ao SDK oficial do STM32.

C:\Users\Usuario\AppData\Local\Arduino15\packages\STMicroelectronics

LMIC LoRaWAN Stack

O programa Raw foi modificado e incluído no Custom Code do Visuino, veja como ficou o código fonte completo gerado pelo Visuino.

//----------------------------------------------
//
//         Sketch Generated by Visuino
//               www.visuino.com
//
//------------------ Source --------------------
//
// lora_p2p_modbus_device.visuino
//
 //----------------------------------------------

#define VISUINO_STMDUINO

#include <OpenWire.h>
#include <Mitov.h>
#include <Mitov_StandardSerial.h>
#include <lmic.h>
#include <hal/hal.h>
#include <SPI.h>

HardwareSerial Serial1(PB4, PB3);
#include <Mitov_CustomCode.h>
#include <Mitov_Converters.h>

// we formerly would check this configuration; but now there is a flag,
// in the LMIC, LMIC.noRXIQinversion;
// if we set that during init, we get the same effect.  If
// DISABLE_INVERT_IQ_ON_RX is defined, it means that LMIC.noRXIQinversion is
// treated as always set.
//
// #if !defined(DISABLE_INVERT_IQ_ON_RX)
// #error This example requires DISABLE_INVERT_IQ_ON_RX to be set. Update \
//        lmic_project_config.h in arduino-lmic/project_config to set it.
// #endif

// How often to send a packet. Note that this sketch bypasses the normal
// LMIC duty cycle limiting, so when you change anything in this sketch
// (payload length, frequency, spreading factor), be sure to check if
// this interval should not also be increased.
// See this spreadsheet for an easy airtime and duty cycle calculator:
// https://docs.google.com/spreadsheets/d/1voGAtQAjC1qBmaVuP1ApNKs1ekgUjavHuVQIXyYSvNc
#define TX_INTERVAL 300

String PAYLOAD_String;
char PAYLOAD_char[512] = {0};

char Text2_[512];

// Pin mapping
const lmic_pinmap lmic_pins = {
    .nss = RADIO_NSS,
    .rxtx = RADIO_ANT_SWITCH_HF, 
    .rst = RADIO_RESET,
    .dio = {RADIO_DIO_0, RADIO_DIO_1, RADIO_DIO_2},
};

// These callbacks are only used in over-the-air activation, so they are
// left empty here (we cannot leave them out completely unless
// DISABLE_JOIN is set in arduino-lmoc/project_config/lmic_project_config.h,
// otherwise the linker will complain).
void os_getArtEui (u1_t* buf) { }
void os_getDevEui (u1_t* buf) { }
void os_getDevKey (u1_t* buf) { }

void onEvent (ev_t ev) {
}

osjob_t txjob;
osjob_t timeoutjob;
static void tx_func (osjob_t* job);

// Transmit the given string and call the given function afterwards
void tx(char *str, osjobcb_t func) {
  os_radio(RADIO_RST); // Stop RX first
  delay(1); // Wait a bit, without this os_radio below asserts, apparently because the state hasn't changed yet
  LMIC.dataLen = 0;
  while (*str)
    LMIC.frame[LMIC.dataLen++] = *str++;
  LMIC.osjob.func = func;
  os_radio(RADIO_TX);
  //text2("TX");
  //Serial.println("TX");
}

// Enable rx mode and call func when a packet is received
void rx(osjobcb_t func) {
  LMIC.osjob.func = func;
  LMIC.rxtime = os_getTime(); // RX _now_
  // Enable "continuous" RX (e.g. without a timeout, still stops after
  // receiving a packet)
  os_radio(RADIO_RXON);
  //text2("RX");
  //Serial.println("RX");
}

static void rxtimeout_func(osjob_t *job) {
  digitalWrite(LED_BUILTIN, LOW); // off
}

static void rx_func (osjob_t* job) {
  // Blink once to confirm reception and then keep the led on
  digitalWrite(LED_BUILTIN, LOW); // off
  delay(10);
  digitalWrite(LED_BUILTIN, HIGH); // on

  // Timeout RX (i.e. update led status) after 3 periods without RX
  os_setTimedCallback(&timeoutjob, os_getTime() + ms2osticks(3*TX_INTERVAL), rxtimeout_func);

  // Reschedule TX so that it should not collide with the other side's
  // next TX
  //os_setTimedCallback(&txjob, os_getTime() + ms2osticks(TX_INTERVAL/2), tx_func);

  ////sprintf(Text2_,"Got %u bytes",LMIC.dataLen);
  ////text2((String) Text2_);
  //Serial.print("Got ");
  //Serial.print((String) LMIC.dataLen);
  //Serial.println(" bytes");
  sprintf(Text2_,"%s",LMIC.frame);
  //bug ?
  Text2_[LMIC.dataLen]=0;
  text2((String) Text2_);

  //Serial.write(LMIC.frame, LMIC.dataLen);
  //Serial.println();

  // Restart RX
  rx(rx_func);
}

static void txdone_func (osjob_t* job) {
  rx(rx_func);
}

// log text to USART and toggle LED
static void tx_func (osjob_t* job) {
  // Transmit if Payload_char not NULL (transmitted by Visuino component)
  if(!(PAYLOAD_char[0] == 0))
     {
      tx(PAYLOAD_char, txdone_func);
      PAYLOAD_char[0]=0;
      PAYLOAD_String="";
      // Blink once to confirm transmit
      digitalWrite(LED_BUILTIN, LOW); // off
      delay(10);
      digitalWrite(LED_BUILTIN, HIGH); // on
      delay(10);
      digitalWrite(LED_BUILTIN, LOW); // off
      delay(10);
      digitalWrite(LED_BUILTIN, HIGH); // on
      delay(10);
      digitalWrite(LED_BUILTIN, LOW); // off
      delay(10);
      digitalWrite(LED_BUILTIN, HIGH); // on
      delay(10);
      digitalWrite(LED_BUILTIN, LOW); // off
      delay(10);
      digitalWrite(LED_BUILTIN, HIGH); // on
      delay(10);
      digitalWrite(LED_BUILTIN, LOW); // off
      delay(10);
      digitalWrite(LED_BUILTIN, HIGH); // on
      delay(10);
      digitalWrite(LED_BUILTIN, LOW); // off
      delay(10);
      digitalWrite(LED_BUILTIN, HIGH); // on
      delay(10);
      digitalWrite(LED_BUILTIN, LOW); // off
      delay(10);
      digitalWrite(LED_BUILTIN, HIGH); // on
      delay(10);
      digitalWrite(LED_BUILTIN, LOW); // off
      delay(10);
      digitalWrite(LED_BUILTIN, HIGH); // on
      } 
  // reschedule job every TX_INTERVAL (plus a bit of random to prevent
  // systematic collisions), unless packets are received, then rx_func
  // will reschedule at half this time.
  os_setTimedCallback(job, os_getTime() + ms2osticks(TX_INTERVAL + random(500)), tx_func);
}


// Shared Component Member Variables

namespace ComponentVariables
{
class
{
public:
  uint32_t Value1 : 10;

} BitFields;

class Variable1
{
public:
  inline static uint32_t GetValue() { return BitFields.Value1; }
  inline static void SetValue( uint32_t AValue ) { BitFields.Value1 = AValue; }

};

} // ComponentVariables

// Pin Call Declarations

namespace PinCalls
{
class PinCallerReceive0
{
public:
  void Notify( void *_Data );

};
class PinCallerReceive1
{
public:
  void Notify( void *_Data );

};
class PinCallerReceive2
{
public:
  void Notify( void *_Data );

};
} // PinCalls

// Call Chains

namespace CallChains
{
class IsEnding1
{
public:
  inline static uint32_t Count() { return 0; }
  static void Call( bool & AResult );

};
} // CallChains

// Arduino Board Declarations

namespace BoardDeclarations
{
namespace Types
{
typedef Mitov::SerialSTM32Port<
  SERIAL_TYPE, // 0_T_TYPE
  Serial, // 1_C_OBJECT
  Mitov::ConstantProperty<4, uint32_t, 0 >, // AfterSendingDelay
  Mitov::ConstantProperty<7, uint32_t, 8 >, // DataBits
  Mitov::ConstantProperty<2, bool, true >, // Enabled
  Mitov::ConstantProperty<14, uint32_t, 0 >, // FEndTime
  Mitov::ConstantProperty<12, bool, false >, // FSending
  Mitov::GenericPin_NoImplementation<5 >, // OutputPin
  Mitov::ConstantProperty<9, Mitov::TArduinoStandardSerialParity, Mitov::spNone >, // Parity
  Mitov::ConstantProperty<10, uint32_t, 10 >, // RXPin
  Mitov::DigitalPin_NoImplementation<3 >, // SendingOutputPin
  Mitov::ConstantProperty<6, uint32_t, 115200 >, // Speed
  Mitov::ConstantProperty<8, uint32_t, 1 >, // StopBits
  Mitov::ConstantProperty<11, uint32_t, 9 > // TXPin
   > SerialPort0;
} // Types

namespace Instances
{
Types::SerialPort0 SerialPort0;
} // Instances

namespace Types
{
typedef Mitov::ArduinoSerialInput_String<BoardDeclarations::Types::SerialPort0, BoardDeclarations::Instances::SerialPort0, char *> SerialPort0_Input_IOWStringStream_1;
} // Types

namespace Instances
{
Types::SerialPort0_Input_IOWStringStream_1 SerialPort0_Input_IOWStringStream_1;
} // Instances

namespace Types
{
typedef Mitov::SerialPort<
  SERIAL_TYPE, // 0_T_TYPE
  Serial1, // 1_C_OBJECT
  Mitov::ConstantProperty<4, uint32_t, 0 >, // AfterSendingDelay
  Mitov::ConstantProperty<7, uint32_t, 8 >, // DataBits
  Mitov::ConstantProperty<2, bool, true >, // Enabled
  Mitov::ConstantProperty<12, uint32_t, 0 >, // FEndTime
  Mitov::ConstantProperty<10, bool, false >, // FSending
  Mitov::GenericPin_EmbeddedPinImplementation<5, ::PinCalls::PinCallerReceive0 >, // OutputPin
  Mitov::ConstantProperty<9, Mitov::TArduinoStandardSerialParity, Mitov::spNone >, // Parity
  Mitov::DigitalPin_NoImplementation<3 >, // SendingOutputPin
  Mitov::ConstantProperty<6, uint32_t, 115200 >, // Speed
  Mitov::ConstantProperty<8, uint32_t, 1 > // StopBits
   > SerialPort1;
} // Types

namespace Instances
{
Types::SerialPort1 SerialPort1;
} // Instances

} // BoardDeclarations

// Custom Code Declarations

namespace CustomCode
{
  class TCustomCodeLoraWAN_Stack1
  {
  public: // Outputs
    Mitov::CustomOutput<
  Mitov::TextPin_EmbeddedPinImplementation<2, ::PinCalls::PinCallerReceive1 >, // OutputPin
  Mitov::String // TYPE
   > Text2;

  public: // Inputs
    inline void __Inputs_o_0_o_Receive( Mitov::String AValue )
    {
AValue.toCharArray(PAYLOAD_char,512);
    }

  public:
    void SystemInit();

  public:
    void SystemStart();

  public:
    void SystemLoopUpdateHardware();

  };
  class TArduinoCustomCodeInputTextElement1
  {
  public:
    void InputPin_o_Receive( void *_Data );

  };
} // CustomCode

// Declarations

namespace Declarations
{
namespace Types
{
typedef CustomCode::TCustomCodeLoraWAN_Stack1 CustomCodeLoraWAN_Stack;
} // Types

namespace Instances
{
Types::CustomCodeLoraWAN_Stack CustomCodeLoraWAN_Stack;
} // Instances

namespace Types
{
typedef CustomCode::TArduinoCustomCodeInputTextElement1 TArduinoCustomCodeInputTextElement1;
} // Types

namespace Instances
{
Types::TArduinoCustomCodeInputTextElement1 TArduinoCustomCodeInputTextElement1;
} // Instances

Mitov::CustomOutput<
  Mitov::TextPin_EmbeddedPinImplementation<2, ::PinCalls::PinCallerReceive1 >, // OutputPin
  Mitov::String // TYPE
   > &TArduinoCustomCodeOutputTextElement1 = Declarations::Instances::CustomCodeLoraWAN_Stack.Text2;

namespace Types
{
typedef Mitov::CharToText<
  Mitov::EmbeddedCallChain<CallChains::IsEnding1 >, // Elements_IsEnding
  Mitov::ConstantProperty<4, bool, true >, // Enabled
  Mitov::ConstantProperty<14, bool, true >, // EndOnNewLine
  Mitov::TypedVariable<9, uint32_t, ::ComponentVariables::Variable1 >, // FIndex
  512, // MaxLength
  Mitov::TextPin_EmbeddedPinImplementation<3, ::PinCalls::PinCallerReceive2 >, // OutputPin
  Mitov::ConstantProperty<12, bool, false >, // Truncate
  Mitov::ConstantProperty<13, bool, false > // UpdateOnEachChar
   > CharToText1;
} // Types

namespace Instances
{
Types::CharToText1 CharToText1;
} // Instances

} // Declarations

// Custom Code Implementations

namespace CustomCode
{
void TCustomCodeLoraWAN_Stack1::SystemInit()
{
pinMode(RADIO_TCXO_VCC_PIN,OUTPUT);
digitalWrite(RADIO_TCXO_VCC_PIN,HIGH);
pinMode(RADIO_ANT_SWITCH_PIN_RX,OUTPUT);
digitalWrite(RADIO_ANT_SWITCH_PIN_RX,HIGH);
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, LOW);
}

void TCustomCodeLoraWAN_Stack1::SystemStart()
{
    //LOM204
    pinMode(RADIO_TCXO_VCC_PIN,OUTPUT);
    digitalWrite(RADIO_TCXO_VCC_PIN,HIGH);
    pinMode(RADIO_ANT_SWITCH_PIN_RX,OUTPUT);
    digitalWrite(RADIO_ANT_SWITCH_PIN_RX,HIGH);
    pinMode(LED_BUILTIN, OUTPUT);
    digitalWrite(LED_BUILTIN, LOW);
    // LMIC init
    // initialize runtime env
  os_init();

  // make it easier for test, by pull the parameters up to the top of the
  // block. Ideally, we'd use the serial port to drive this; or have
  // a voting protocol where one side is elected the controller and
  // guides the responder through all the channels, powers, ramps
  // the transmit power from min to max, and measures the RSSI and SNR.
  // Even more amazing would be a scheme where the controller could
  // handle multiple nodes; in that case we'd have a way to do
  // production test and qualification. However, using an RWC5020A
  // is a much better use of development time.

  // set fDownlink true to use a downlink channel; false
  // to use an uplink channel. Generally speaking, uplink
  // is more interesting, because you can prove that gateways
  // *should* be able to hear you.
  const static bool fDownlink = false;

  // the downlink channel to be used.
  const static uint8_t kDownlinkChannel = 3;

  // the uplink channel to be used.
  const static uint8_t kUplinkChannel = 8 + 3;

  // this is automatically set to the proper bandwidth in kHz,
  // based on the selected channel.
  uint32_t uBandwidth;

 if (! fDownlink)
        {
        if (kUplinkChannel < 64)
                {
                LMIC.freq = AU915_125kHz_UPFBASE +
                            kUplinkChannel * AU915_125kHz_UPFSTEP;
                uBandwidth = 125;
                }
        else
                {
                LMIC.freq = AU915_500kHz_UPFBASE +
                            (kUplinkChannel - 64) * AU915_500kHz_UPFSTEP;
                uBandwidth = 500;
                }
        }
  else
        {
        // downlink channel
        LMIC.freq = AU915_500kHz_DNFBASE +
                    kDownlinkChannel * AU915_500kHz_DNFSTEP;
        uBandwidth = 500;
        }

  // Use a suitable spreading factor
  if (uBandwidth < 500)
        LMIC.datarate = AU915_DR_SF10;         // DR4
  else
        LMIC.datarate = AU915_DR_SF12CR;      // DR8

  // default tx power for AU: 30 dBm
  LMIC.txpow = 20;

  // disable RX IQ inversion
  LMIC.noRXIQinversion = true;

  // This sets CR 4/5, BW125 (except for EU/AS923 DR_SF7B, which uses BW250)
  LMIC.rps = updr2rps(LMIC.datarate);

  sprintf(Text2_,"Frequency: %u.%uMHz  LMIC.datarate: %u  LMIC.txpow: %u",LMIC.freq / 1000000,(LMIC.freq / 100000) % 10,LMIC.datarate,LMIC.txpow);
  text2(Text2_);

  // This sets CR 4/5, BW125 (except for DR_SF7B, which uses BW250)
  LMIC.rps = updr2rps(LMIC.datarate);

  // disable RX IQ inversion
  LMIC.noRXIQinversion = true;
  // setup initial job

  //event receive - unidirecional
  rx(rx_func);
  os_setCallback(&txjob, tx_func);
}

void TCustomCodeLoraWAN_Stack1::SystemLoopUpdateHardware()
{
os_runloop_once();
}

void TArduinoCustomCodeInputTextElement1::InputPin_o_Receive( void *_Data )
{
  Declarations::Instances::CustomCodeLoraWAN_Stack.__Inputs_o_0_o_Receive( Mitov::String( ( char *)_Data ) );
}
} // CustomCode

// Type Converters

namespace TypeConverters
{
Mitov::Convert_BinaryBlockToChar Converter0;
} // TypeConverters

// Call Chains

namespace CallChains
{
void IsEnding1::Call( bool & AResult )
{
}

} // CallChains

// Pin Call Declarations

namespace PinCalls
{
void PinCallerConverterReceive1( void *_Data );
} // PinCalls

// Pin Call Implementations

namespace PinCalls
{
void PinCallerReceive0::Notify( void *_Data )
{
  TypeConverters::Converter0.Convert( _Data, PinCallerConverterReceive1 );
}

void PinCallerConverterReceive1( void *_Data )
{
  Declarations::Instances::CharToText1.InputPin_o_Receive( _Data );
}
void PinCallerReceive1::Notify( void *_Data )
{
  BoardDeclarations::Instances::SerialPort0_Input_IOWStringStream_1.InputPin_o_Receive( _Data );
}

void PinCallerReceive2::Notify( void *_Data )
{
  Declarations::Instances::TArduinoCustomCodeInputTextElement1.InputPin_o_Receive( _Data );
}

} // PinCalls

namespace ComponentsHardware
{
void SystemUpdateHardware()
{
  Declarations::Instances::CustomCodeLoraWAN_Stack.SystemLoopUpdateHardware();
}
} // ComponentsHardware

void text2(String Txt)
{
    Declarations::Instances::CustomCodeLoraWAN_Stack.Text2.Send(Txt);
}

//The setup function is called once at startup of the sketch
void setup()
{
  BoardDeclarations::Instances::SerialPort0.SystemInit();
  BoardDeclarations::Instances::SerialPort1.SystemInit();
  Declarations::Instances::CustomCodeLoraWAN_Stack.SystemInit();
  Declarations::Instances::CustomCodeLoraWAN_Stack.SystemStart();
}

// The loop function is called in an endless loop
void loop()
{
  BoardDeclarations::Instances::SerialPort1.SystemLoopBeginOutput();

  ComponentsHardware::SystemUpdateHardware();
}

Certifique-se que LOM204 e programador estejam selecionados, bem como demais parâmetros e então compile.

Transfira o programa para os dois LOM204

Pronto, agora você tem dois LOM204 para comunicação P2p.

Você agora pode desenvolver uma aplicação no NINA W106 (Master) que envie dados para os demais NINA W106 (Slaves), conforme descrito no início.

Para NINA W106 (Master ou Slave) fazer um broadcasting, dever enviar (Txd) via Serial o pacote até o RX5 do LOM204.

Para o NINA W106 (Master ou Slave) receber (Rxd) um broadcasting, deve ser conectando a Serial no TX1 do LOM204.

A velocidade comunicação com a UART é de 115200,N,8,1

Não envie dados antes do intervalo de 300mS.

Master

Slave

Colisões

Não deveria haver, pois apenas um Slave irá responder por vez.

Vídeo da execução da comunicação Master e Slave

Parte I

Parte II

P2P

Payloads

Slave recebendo requisição e devolvendo dados para Master

Frequência LoRa (Default do exemplo Raw LMIC)

Streaming para 3 Slaves

Testando P2P com 3 NINA W106 (1 Master e 2 Slaves)

LED (PC_0)

Enquanto aceso tiver 1 Blink - recepção de dados (tanto do Master como Slave)

Enquanto aceso tiver 2 Blinks rápidos - transmissão de dados

Apagado - ocioso

STM32Programmer

STM32CubeProg - STM32CubeProgrammer software for all STM32 - STMicroelectronics

Uma boa opção se tiveres problemas com drivers é instalar.

Fontes:

Read meta-information from ACK-Packet (Arduino LMIC) - End Devices (Nodes) / LMIC - The Things Network

mcci-catena/arduino-lmic: LoraWAN-MAC-in-C library, adapted to run under the Arduino environment (github.com)

STM32 Cube Programmer - Aticleworld

SmartCore - --- SmartCore - tecnico publico - All Documents (sharepoint.com)

Read meta-information from ACK-Packet (Arduino LMIC) - End Devices (Nodes) / LMIC - The Things Network

Upgrading LoRaWAN Application by adding LoRa Peer-to-Peer Link onto Microchip ATSAMR34 Xplained Pro Kit - Stories - Labs (thethingsnetwork.org)

What is Peer-To-Peer (P2P) LR Communication? - Latest Open Tech From Seeed (seeedstudio.com)

Dúvidas

suporte@smartcore.com.br

Sobre a SMARTCORE

A SmartCore fornece módulos para comunicação wireless, biometria, conectividade, rastreamento e automação.

Nosso portfólio inclui modem 2G/3G/4G/NB-IoT/Cat.M, satelital, módulos WiFi, Bluetooth, GNSS / GPS, Sigfox, LoRa, leitor de cartão, leitor QR code, mecanismo de impressão, mini-board PC, antena, pigtail, LCD, bateria, repetidor GPS e sensores.

Mais detalhes em www.smartcore.com.br

MÓDULOS E KITS LoRa/LoRaWAN, LoRa MESH - PRIMEIROS PASSOS

segunda-feira, 25 de julho de 2022

WISOL LOM204 COMO INTERFACE PARA COMUNICAÇÃO MASTER/SLAVE (P2P)