MODBUS_Schneider iEM3155_read_only

/*
esp8266
14 / D5 - Rx
12 / D6 - Tx
Elektromer Schneider iEM3155-M (38400) MODBUS
RS485 to TTL module
*/
#include <ModbusMaster.h>
#include <SoftwareSerial.h>
uint8_t result;
uint16_t data[1024];
uint16_t data_test1;
uint16_t data_test2;
uint16_t V1;
uint16_t V2;
uint16_t V3;
uint16_t VAvg;
uint16_t A1;
uint16_t A2;
uint16_t A3;
uint16_t AAvg;
uint16_t PwrFactor;
uint16_t Freq;
uint16_t Pwr1;
uint16_t Pwr2;
uint16_t Pwr3;
uint16_t PwrTotal;

bool modbusError;
SoftwareSerial mySerial(14, 12); // RX, TX

#define MAX485_DE      3
#define MAX485_RE_NEG  2

ModbusMaster node;

void preTransmission()
{
  digitalWrite(MAX485_RE_NEG, 1);
  digitalWrite(MAX485_DE, 1);
}

void postTransmission()
{
  digitalWrite(MAX485_RE_NEG, 0);
  digitalWrite(MAX485_DE, 0);
}

void setup()
{
  pinMode(MAX485_RE_NEG, OUTPUT);
  pinMode(MAX485_DE, OUTPUT);

  digitalWrite(MAX485_RE_NEG, 0);
  digitalWrite(MAX485_DE, 0);

  Serial.begin(38400);
  mySerial.begin(38400);

  node.begin(1, mySerial);

  node.preTransmission(preTransmission);
  node.postTransmission(postTransmission);

}

 uint8_t readHoldingRegisters(uint16_t regpos, uint16_t size) {
  uint8_t result;
  result = node.readHoldingRegisters(regpos, size);
  if (result == node.ku8MBSuccess)
  {
    for (int j = 0; j < size; j++)
    {
      data[j] = node.getResponseBuffer(j);
    }
  } else {
    modbusError = true;
  }


  return result;
}


void loop() {
  delay(1000);
 Serial.println();

// vycteni napeti faze 1 V1
   delay(5);
  readHoldingRegisters(0x0BD3, 1);
    Serial.print("V1: ");
 for(int i = 0; i < 1; i++)
{
  Serial.println(data[i], HEX);
  V1 = data[i];
}
// vycteni napeti faze 2 V2
delay(5);
   readHoldingRegisters(0x0BD5, 1);
   Serial.print("V2: ");
 for(int i = 0; i < 1; i++)
{
  Serial.println(data[i], HEX);
  V2 = data[i];
}
// vycteni napeti faze 3 V3
delay(5);
   readHoldingRegisters(0x0BD7, 1);
   Serial.print("V3: ");
 for(int i = 0; i < 1; i++)
{
  V3 = data[i];
  Serial.println(data[i], HEX);
}
// vycteni napeti prumer VAvg
delay(5);
   readHoldingRegisters(0x0BDB, 1);
   Serial.print("VAvg: ");
 for(int i = 0; i < 1; i++)
{
  Serial.println(data[i], HEX);
  VAvg = data[i];
}

// vycteni proudu faze 1 A1
   delay(5);
  readHoldingRegisters(0x0BB7, 1);
    Serial.print("A1: ");
 for(int i = 0; i < 1; i++)
{
  Serial.println(data[i], HEX);
  A1 = data[i];
}
// vycteni proudu faze 2 A2
delay(5);
   readHoldingRegisters(0x0BB9, 1);
   Serial.print("A2: ");
 for(int i = 0; i < 1; i++)
{
  Serial.println(data[i], HEX);
  A2 = data[i];
}
// vycteni proudu faze 3 A3
delay(5);
   readHoldingRegisters(0x0BBB, 1);
   Serial.print("A3: ");
 for(int i = 0; i < 1; i++)
{
  Serial.println(data[i], HEX);
  A3 = data[i];
}
// vycteni proudu prumer AAvg
delay(5);
   readHoldingRegisters(0x0BC1, 1);
   Serial.print("AAvg: ");
 for(int i = 0; i < 1; i++)
{
  Serial.println(data[i], HEX);
  AAvg = data[i];
}
// vycteni vykon faze 1 Pwr1
   delay(5);
  readHoldingRegisters(0x0BED, 1);
    Serial.print("Pwr1: ");
 for(int i = 0; i < 1; i++)
{
  Serial.println(data[i], HEX);
  Pwr1 = data[i];
}
// vycteni vykon faze 2 Pwr2
delay(5);
   readHoldingRegisters(0x0BEF, 1);
   Serial.print("Pwr2: ");
 for(int i = 0; i < 1; i++)
{
  Serial.println(data[i], HEX);
  Pwr2 = data[i];
}
// vycteni vykon faze 3 Pwr3
delay(5);
   readHoldingRegisters(0x0BF1, 1);
   Serial.print("Pwr3: ");
 for(int i = 0; i < 1; i++)
{
  Serial.println(data[i], HEX);
  Pwr3 = data[i];
}
// vycteni vykon prumer PwrTotal
delay(5);
   readHoldingRegisters(0x0BF3, 1);
   Serial.print("PwrTotal: ");
 for(int i = 0; i < 1; i++)
{
  Serial.println(data[i], HEX);
  PwrTotal = data[i];
}
// vycteni uciniku PwrFactor
delay(5);
   readHoldingRegisters(0x0C0B, 1);
   Serial.print("PwrFactor: ");
 for(int i = 0; i < 1; i++)
{
  Serial.println(data[i], HEX);
  PwrFactor = data[i];
}
// vycteni frekvence site Freq
delay(5);
   readHoldingRegisters(0x0C25, 1);
   Serial.print("Freq: ");
 for(int i = 0; i < 1; i++)
{
  Serial.println(data[i], HEX);
  Freq = data[i];
}

}