#include <SoftwareSerial.h>
#define SSerialRX        9
#define SSerialTX        8
#define SSerialTxControl 7
#define RS485Transmit    HIGH
#define RS485Receive     LOW

SoftwareSerial RS485Serial(SSerialRX, SSerialTX); // RX, TX

struct mydata {
  char cmd;
  int count;
  float temp;
  char str[20];
};
mydata dato;

byte stato = 0;


void setup() {
    RS485Serial.begin(4800);
   Serial.begin(9600);
  pinMode(SSerialTxControl, OUTPUT);
  digitalWrite(SSerialTxControl, RS485Receive);
}
byte buff[20];
int i = 0;
void loop(){
    digitalWrite(SSerialTxControl, RS485Transmit);
    int a = (stato%3);
    Serial.println(a);
    RS485Serial.write( a );  //produce una sequenza: 0, 1, 2

    digitalWrite(SSerialTxControl, RS485Receive);  // Disable RS485 Transmit
    stato++;


  if (RS485Serial.available()) {
    byte n = RS485Serial.read();
    if ((char)n == '\n') {
Serial.println(n);
      //mySerial.write((const uint8_t *)&dato, sizeof(struct mydata));

      memcpy(&dato, buff, i);

      Serial.print(dato.cmd);Serial.print(" - ");
      Serial.print(dato.count);Serial.print(" - ");
      Serial.print(dato.temp);Serial.print("\n");
      Serial.print(dato.str);Serial.print("\n");

      Serial.print("ricevuti: ");
      Serial.print(i);
      Serial.println(" bytes - END");
      i = 0;
    } else {
      buff[i] = n;
      i++;
    }
     delay(1000);
  }
  //mySerial.write((const uint8_t *)&dato, sizeof(struct mydata));
}