#include <Stream.h>

#define BUFSIZE 3 // Tamanho do buffer
#define MAXCMDSIZE 96 // Tamanho maximo do comando

// Pega os comandos vindo do software
void GetCommand();

char _bufLen = 0; // Tamanho do buffer armazenado
char _cmdCount[sizeof(MAXCMDSIZE)]; // Conta o tamanho do comando
char _cmdBuffer[BUFSIZE][MAXCMDSIZE];

void setup() {
  _cmdCount[0] = 0; //Inicializa
  _cmdCount[1] = 0;
  //Inicia a comunicação serial
  Serial.begin(115200);
}

void loop() {
  if (_bufLen < (BUFSIZE - 1))
    GetCommand();
}

void GetCommand() {
  char serialChar; //Caractere da porta serial
  while (Serial.available() > 0 && _bufLen < BUFSIZE) {

    // Read the incoming data:
    serialChar = Serial.read();
    if (serialChar != 'n' && serialChar != 'r') {
      _cmdBuffer[_bufLen][(int)_cmdCount] = serialChar;

      // Say what you got:
      Serial.print("I received: ");
      Serial.println(_cmdBuffer[_bufLen]);
      /** ------Problem---------*/
      _cmdCount = (char[2])(1 + atoi(_cmdCount));
    }
  }
}

_cmdCount = (char[2])(1 + atoi(_cmdCount));