char *comand = new char[query.length()];   // Create pointer to store the query
strcpy(comand, query.c_str());             // Convert the query to char [] which is the necessary format for the write command.
int n_written = 0;
int spot = 0;

do {
    n_written = write( USB, &comand[spot], 1 );
    spot += n_written;
} while (comand[spot-1] != 'n' && n_written > 0);

delete[] comand;