Increases the serial response waiting time.

measurement_main.py

 NR_CQI_COMMAND = b'AT+QNWCFG="nr5g_csi"\r\n'
 NR_SERVINGCELL_COMMAND = b'AT+QENG="servingcell"\r\n'
 NR_EN_DC_STATUS_COMMAND = b"AT+QENDC\r\n"
-NR_SERIAL_RESPOND_TIME = 0.3  # s
+NR_SERIAL_RESPOND_TIME = 0.5  # s
 CMD_TIME_EPOCH = "date +%s"
 TIMEOUT_OFFSET = 10.0
 WAIT_AFTER_IPERF = 5.0
             )
             for cmd in run_cmds:
                 ser.write(cmd)
-                sleep(0.3)
+                sleep(NR_SERIAL_RESPOND_TIME)
                 response += ser.read(ser.inWaiting()).decode("utf-8")
             response = (
                 response.replace("\n", ";")