ModBus_Master_Teste

#include <SimpleModbusMaster.h>
int flag;
#define baud 9600
#define timeout 1000
#define polling 200 // the scan rate
#define retry_count 10

#define TxEnablePin 2

#define LED 9
#define LUZ 13

#define TOTAL_NO_OF_REGISTERS 3

enum
{
  PACKET1,
  PACKET2,
  PACKET3,

  TOTAL_NO_OF_PACKETS // leave this last entry
};

Packet packets[TOTAL_NO_OF_PACKETS];

unsigned int regs[TOTAL_NO_OF_REGISTERS];

void setup()
{                                                         //     1 int Addr   0001
  Serial.begin(9600);                                     //     1 int data   0001
                                                         //     2 start addr Reg[2]
//  modbus_construct(&packets[PACKET1], 2, READ_HOLDING_REGISTERS, 0, 1, 0);
//  modbus_construct(&packets[PACKET2], 2, READ_HOLDING_REGISTERS, 1, 1, 2);
//  modbus_construct(&packets[PACKET3], 1, READ_HOLDING_REGISTERS, 0, 1, 0);

  modbus_construct(&packets[PACKET1], 2, READ_HOLDING_REGISTERS, 0, 1, 0);
  modbus_construct(&packets[PACKET2], 2, READ_HOLDING_REGISTERS, 1, 1, 2);
  modbus_construct(&packets[PACKET3], 2, READ_HOLDING_REGISTERS, 2, 1, 4);

  modbus_configure(&Serial1, baud, SERIAL_8N2, timeout, polling, retry_count, TxEnablePin, packets, TOTAL_NO_OF_PACKETS, regs);
  pinMode(LED, OUTPUT);
  pinMode(LUZ, OUTPUT);
}
void loop()
{
  modbus_update();
  unsigned long temp = (unsigned long)regs[0] << 16 | regs[1];
  Serial.println(" ");
  Serial.println("Regs");
  Serial.println(regs[0]);
  Serial.println(regs[2]);
  Serial.println(regs[4]);
}