serial = sr_serial_dev_inst_new(conn, serialcomm);
ret = serial_open(serial, SERIAL_RDWR);
snprintf(conn_id, sizeof(conn_id), "%s", serial->port);
serial = sr_serial_dev_inst_new(conn, serialcomm);
ret = serial_open(serial, SERIAL_RDWR);
snprintf(conn_id, sizeof(conn_id), "%s", serial->port);