#include <Wire.h>

// Cooking API libraries
#include <arduinoUtils.h>

// Include these libraries for using the RS-485 and Modbus functions
#include <arduinoRS485.h>
#include <ModbusMaster485.h>
#include <SPI.h>

// Instantiate ModbusMaster object as slave ID 1
ModbusMaster485 node(1);

// Define one addres for reading
#define address 0

// Define the number of bytes to read
#define bytesQty 2

void setup()
{
 
  // Power on the USB for viewing data in the serial monitor
  Serial.begin(115200);
  delay(100);
  // Initialize Modbus communication baud rate
  // Only allowed in SOCKET1
  node.begin(9600);

  // Print hello message
  Serial.println("Modbus communication over RS-485");
  delay(100);
}


void loop()
{
  // This variable will store the result of the communication
  // result = 0 : no errors
  // result = 1 : error occurred
  int result =  node.readHoldingRegisters(address, bytesQty);

  if (result != 0) {
    // If no response from the slave, print an error message
    Serial.println("Communication error");
    delay(1000);
  }
  else {

    // If all OK
    Serial.print("Read value : ");

    // Print the read data from the slave
    Serial.print(node.getResponseBuffer(0));
    delay(1000);
  }

  Serial.print("\n");
  delay(2000);

  // Clear the response buffer
  node.clearResponseBuffer();

}

#include <Wire.h>

// Cooking API libraries
#include <arduinoUtils.h>

// Include these libraries for using the RS-485 and Modbus functions
#include <arduinoRS485.h>
#include <ModbusSlave485.h>
#include <SPI.h>

// Create new mbs instance
ModbusSlave485 mbs;

// Slave registers
enum {
  MB_0,   // Register 0
  MB_REGS // Dummy register. using 0 offset to keep size of array
};

int regs[MB_REGS];

void setup() {

 
  pinMode(4,INPUT);
  // Power on the USB for viewing data in the serial monitor
  Serial.begin(115200);

  // Modbus slave configuration parameters
  // SlaveId
  const unsigned char SLAVE = 1;
  // Baud rate
  const long BAUD = 9600;

  // Configure msb with config settings
  // Only allowed in SOCKET1
  mbs.configure(SLAVE, BAUD);
}

void loop()
{
  // Pass current register values to mbs
  mbs.update(regs, MB_REGS);

  // Read all the analog Inputs, and store the values in
  // the Modbus registers.
  regs[MB_0] = digitalRead(4);  // Read input dig pin4

  delay(10);
}

#include "ModbusMaster485.h"
#include "arduPi.h"




// Instantiate ModbusMaster object as slave ID 1
ModbusMaster485 node(254);

// Define one addres for reading, desde 0 hasta 65535
#define address 31006

// Define the number of bytes to read
#define bytesQty 2

void setup()
{
  pinMode(5, OUTPUT);
  digitalWrite(5, LOW);
 
  // Power on the USB for viewing data in the serial monitor
  Serial.begin(115200);
  delay(100);
  // Initialize Modbus communication baud rate
  node.begin(9600);

  // Print hello message
  printf("Modbus communication over RS-485\n");
  delay(100);
}


void loop()
{
  // This variable will store the result of the communication
  // result = 0 : no errors
  // result = 1 : error occurred
  int result =  node.readInputRegisters(address, bytesQty);

  if (result != 0) {
    // If no response from the slave, print an error message
    printf("Communication error\n");
    delay(1000);
  }
  else {

    // If all OK
    printf("Read value : \n");

    // Print the read data from the slave
    Serial.print(node.getResponseBuffer(0));
    delay(1000);
  }

  printf("\n");
  delay(2000);

  // Clear the response buffer
  node.clearResponseBuffer();

}

int main (){
  setup();
  while(1){
    loop();
  }
  return (0);
}