Problem with Modbus communication between ESP32 and VFD

Official Hardware Nano Family Nano ESP32
1

Hi!
I am trying to comunicate an VFD with an ESP32 via Modbus but it did not work.
Conecting the VFD with an "Modbus-TTL converter" it is working perfectly. Also I made a code using arduino and also it is working well, but when I try to use the same code to ESP32, it does not work.
I tried a lot of examples and libraries without any results.
I attach the code that work in Arduino:

#include <SimpleModbusMaster.h>

#define baud 9600 
#define timeout 1000
#define polling 200 
#define retry_count 10
#define TxEnablePin 15 

enum  
{
  PACKET1,
  TOTAL_NO_OF_PACKETS
};

Packet packets[TOTAL_NO_OF_PACKETS];

packetPointer packet1 = &packets[PACKET1];

unsigned int volt[2]; 
long time_past=0;

void setup()
{
  pinMode(7,INPUT);
  Serial.begin(9600);
  Serial2.begin(9600, SERIAL_8N1, 27, 26);

modbus_construct(packet1, 2, READ_HOLDING_REGISTERS, 3846, 1, volt);  
modbus_configure(&Serial2, baud, SERIAL_8N1, timeout, polling, retry_count, TxEnablePin, packets, TOTAL_NO_OF_PACKETS);

time_past = millis(); 
}

void loop()
{
  modbus_update();
  
  if((millis()-time_past) >= 500) 
     {
       Serial.print("Voltage: "); Serial.print(volt[0] / 10.0f); Serial.println(" V");
       Serial.println();
       time_past = millis();
     }
}

I have also tried another library (ModbusRTU.h) and with Arduino I can read some data but again, when I upload the same code to the ESP32 nothing work.
The code is this one:

#include <ModbusRTU.h>
#include <SoftwareSerial.h>

float InttoFloat(uint16_t Data0,uint16_t Data1) {
  float x;
  unsigned long *p;
  p = (unsigned long*)&x;
  *p = (unsigned long)Data0 << 16 | Data1; //Big-endian
  return(x);
}
SoftwareSerial S(27, 26);

ModbusRTU mb;

bool cb(Modbus::ResultCode event, uint16_t transactionId, void* data) { // Callback to monitor errors
  if (event != Modbus::EX_SUCCESS) {
    Serial.print("Request result: 0x");
    Serial.println(event, HEX);
  }
  return true;
}

void setup() {
  Serial.begin(9600);
  S.begin(9600);
  mb.begin(&S,15); // RE/DE connected to D0 of ESP8266
  mb.master();
}

uint16_t val[2];
void loop() {
  
  if (!mb.slave()) {
    mb.readHreg(2, 2057, val, 2, cb); // Slave id is 1 and register address is 2057 and 
    //we are reading 2 bytes from the register and saving in val
    while(mb.slave()) { // Check if transaction is active
      mb.task();
      delay(100);
    }
    Serial.println("Register Values ");
    Serial.println(val[0]);
    Serial.println(val[1]);
  float voltage= InttoFloat(val[1],val[0]);
  Serial.print("Voltage= ");
  Serial.print(voltage);
  Serial.println("V");
      }
  delay(1000);
}

The wiring is correct on ESP32 because I checked if the number of pin that I write in code are the same on board.

Please if someone know what is happen I will be grateful for the help. I was trying different codes for one month but no one worked.

Thanks in advance.