Andres Sabas
Published © CC BY-NC-SA

Send Modbus Data to LoraWAN with Arduino

You will learn to manipulate and manage Modbus devices through the Bastwan development board and its Wing RS485 Modbus on Arduino IDE.

AdvancedFull instructions provided6 hours2,989
Send Modbus Data to LoraWAN with Arduino

Things used in this project

Hardware components

BastWAN
Electronic Cats BastWAN
×1
Wing RS485 Modbus
×1
Modbus C4E Sensor
×1
Omnidirectional antenna 915 MHz x2
×1

Software apps and online services

Arduino IDE
Arduino IDE
The Things Stack
The Things Industries The Things Stack
Ubidots
Ubidots

Story

Read more

Code

Sensor_C4EModbus_LoRa.ino

Arduino
/********************************************************************
  Example using AqualaboSensors library to communicate
  with C4E controller using a half-duplex RS485 transceiver.

  This example is tested against an Sensor C4E.

  Depended Library: ModbusFP

  created 26 July 2020
  by Author:: Andres Sabas @ Electronic Cats

  This code is beerware; if you see me (or any other Electronic Cats
  member) at the local, and you've found our code helpful,
  please buy us a round!
  Distributed as-is; no warranty is given.

*********************************************************************/
#include <AqualaboSensors.h>
#include<CayenneLPP.h>
#include <SPI.h>

CayenneLPP lpp(51);

/*!
  We're using a MAX485-compatible RS485 Transceiver.
  Rx/Tx is hooked up to the hardware serial port at 'Serial2'.
  The Data Enable and Receiver Enable pins are hooked up as follows:
*/
#include <lorawan.h>

//ABP Credentials 
const char *devAddr = "26013557";
const char *nwkSKey = "040A022068FB1C137888440CE072ACF0";
const char *appSKey = "3D3E011CBB4CEF72885D12B91C85D680";

const unsigned long interval = 10000;    // 10 s interval to send message
unsigned long previousMillis = 0;  // will store last time message sent
unsigned int counter = 0;     // message counter

char myStr[50];
char outStr[255];
byte recvStatus = 0;

const sRFM_pins RFM_pins = {
  .CS = SS,
  .RST = RFM_RST,
  .DIO0 = RFM_DIO0,
  .DIO1 = RFM_DIO1,
  .DIO2 = RFM_DIO2,
  .DIO5 = RFM_DIO5,
};
// instantiate aqualaboModbusSensors object
aqualaboModbusSensorsClass aqualaboModbusSensors;

void setup() {
  Serial.begin(9600);

  
  
  while (!Serial);
  Serial.println("Modbus Sensor C4E");
  
  if(!lora.init()){
    Serial.println("RFM95 not detected");
    delay(5000);
    return;
  }
    pinMode(RFM_TCX_ON,OUTPUT);
    pinMode(RFM_SWITCH,OUTPUT);
    pinMode(LED_BUILTIN,OUTPUT);

  // Set LoRaWAN Class change CLASS_A or CLASS_C
  lora.setDeviceClass(CLASS_A);

  // Set Data Rate
  lora.setDataRate(SF8BW125);

  // set channel to random
  lora.setChannel(MULTI);
  
  // Put ABP Key and DevAddress here
  lora.setNwkSKey(nwkSKey);
  lora.setAppSKey(appSKey);
  lora.setDevAddr(devAddr);
// Modbus communication runs at 9600 baud
  Serial1.begin(9600);
  //Modbus slave ID 1, pin De, Pin Re, Serial
  aqualaboModbusSensors.begin(30, 11, 10, Serial1 );
  
  // Setups the sensor configuration paramenters 
  Serial.println("Init sensor");
  aqualaboModbusSensors.initSensor();
  
  Serial.println("Ready... ");
}

void loop() {
  
  // Reads the sensor data
  aqualaboModbusSensors.read();

  // Variable: stores measured temperature in Celsius degrees
  Serial.print("Temperature: ");
  Serial.println(aqualaboModbusSensors.sensorC4E.temperature, 2);
  
  // Variable: stores measured conductivity in S/cm
  Serial.print("Conductivity: ");
  Serial.println(aqualaboModbusSensors.sensorC4E.conductivity, 2);
  
  
 if(millis() - previousMillis > interval) {
     previousMillis = millis();

     Serial.print("Sending: ");
     printVariables();

     lora.sendUplink((char *)lpp.getBuffer(), lpp.getSize(), 0, 1);
    }

    recvStatus = lora.readData(outStr);
    if(recvStatus) {
     Serial.println("Received: ");
     Serial.println(outStr);
    }
  
  // Check Lora RX
  lora.update();
}

void printVariables()
{
  lpp.reset();

  int humidity = aqualaboModbusSensors.sensorC4E.conductivity;
  Serial.print(F("conductivity="));
  Serial.print(humidity, 2);
  lpp.addRelativeHumidity(3, humidity);

  int temp = aqualaboModbusSensors.sensorC4E.temperature;
  Serial.print(F(", Tempetarure="));
  Serial.print(temp, 2);
  lpp.addTemperature(4, temp);


}

LoRa_Modbus_TTN.ino

Arduino
#include <AqualaboSensors.h>
#include<CayenneLPP.h>
#include <SPI.h>

CayenneLPP lpp(51);

/*!
  We're using a MAX485-compatible RS485 Transceiver.
  Rx/Tx is hooked up to the hardware serial port at 'Serial2'.
  The Data Enable and Receiver Enable pins are hooked up as follows:
*/
#include <lorawan.h>

//ABP Credentials 
const char *devAddr = "26013557";
const char *nwkSKey = "040A022068FB1C137888440CE072ACF0";
const char *appSKey = "3D3E011CBB4CEF72885D12B91C85D680";


const unsigned long interval = 5000;    // 10 s interval to send message
unsigned long previousMillis = 0;  // will store last time message sent
unsigned int counter = 0;     // message counter

char myStr[50];
char outStr[255];
byte recvStatus = 0;

const sRFM_pins RFM_pins = {
  .CS = SS,
  .RST = RFM_RST,
  .DIO0 = RFM_DIO0,
  .DIO1 = RFM_DIO1,
  .DIO2 = RFM_DIO2,
  .DIO5 = RFM_DIO5,
};
// instantiate aqualaboModbusSensors object
aqualaboModbusSensorsClass aqualaboModbusSensors;

void setup() {
  Serial.begin(9600);

  
  
  Serial.println("Modbus Sensor C4E");
  
  if(!lora.init()){
    Serial.println("RFM95 not detected");
    delay(5000);
    return;
  }
    pinMode(RFM_TCX_ON,OUTPUT);
    pinMode(RFM_SWITCH,OUTPUT);
    pinMode(LED_BUILTIN,OUTPUT);

  // Set LoRaWAN Class change CLASS_A or CLASS_C
  lora.setDeviceClass(CLASS_A);

  // Set Data Rate
  lora.setDataRate(SF8BW125);

  // set channel to random
  lora.setChannel(MULTI);
  
  // Put ABP Key and DevAddress here
  lora.setNwkSKey(nwkSKey);
  lora.setAppSKey(appSKey);
  lora.setDevAddr(devAddr);
// Modbus communication runs at 9600 baud
  Serial1.begin(9600);
  //Modbus slave ID 1, pin De, Pin Re, Serial
  aqualaboModbusSensors.begin(30, 11, 10, Serial1 );
  
  // Setups the sensor configuration paramenters 
  Serial.println("Init sensor");
  aqualaboModbusSensors.initSensor();
  
  Serial.println("Ready... ");
}

void loop() {
  
  // Reads the sensor data
  aqualaboModbusSensors.read();

  // Variable: stores measured temperature in Celsius degrees
  Serial.print("Temperature: ");
  Serial.println(aqualaboModbusSensors.sensorC4E.temperature, 2);
  
  // Variable: stores measured conductivity in S/cm
  Serial.print("Conductivity: ");
  Serial.println(aqualaboModbusSensors.sensorC4E.conductivity, 2);
  
  
 if(millis() - previousMillis > interval) {
     previousMillis = millis();

     Serial.print("Sending: ");
     printVariables();

     lora.sendUplink((char *)lpp.getBuffer(), lpp.getSize(), 0, 1);
    }

    recvStatus = lora.readData(outStr);
    if(recvStatus) {
     Serial.println("Received: ");
     Serial.println(outStr);
    }
  
  // Check Lora RX
  lora.update();
}

void printVariables()
{
  lpp.reset();

  int sensorValue = aqualaboModbusSensors.sensorC4E.conductivity;
  Serial.print(F("conductivity="));
  Serial.print(sensorValue, 2);
  lpp.addBarometricPressure(1, sensorValue);

  int temp = aqualaboModbusSensors.sensorC4E.temperature;
  Serial.print(F(", Tempetarure="));
  Serial.print(temp, 2);
  lpp.addTemperature(2, temp);


}

Credits

Andres Sabas

Andres Sabas

40 projects • 43 followers
Co-Founder of The Inventor's House Hackerspace, DIY, Workaholic

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