Last modified by Mengting Qiu on 2025/03/08 11:33
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From version < 142.1 >
edited by Mengting Qiu
on 2024/02/26 11:28
To version < 132.1 >
edited by Edwin Chen
on 2024/02/07 00:29
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22 22  To attache NB-IoT sensors to NB-IoT Network, You need to:
23 23  
24 24  1. Get a NB-IoT SIM card from Service Provider. (Not the same as the SIM card we use in mobile phone)
25 -1. Power Off End Node ( See below for the power off/on position)
26 -1. Insert the SIM card to Sensor. ( See below for direction)
27 -1. Power On End Node
25 +1. Insert the SIM card to Sensor
28 28  1. [[Configure APN>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20configure%20APN%20in%20the%20node/]] in the sensor (AT+APN=<APN>)
29 29  
30 -[[image:image-20240208102804-1.png||height="286" width="696"]]
31 -
32 32  [[image:image-20230808205045-1.png||height="293" width="438"]]
33 33  
34 34  After doing above, the NB-IoT Sensors should be able to attach to NB-IoT network .
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627 627  [[image:image-20230807233631-2.png]]
628 628  
629 629  
630 -= 4. FAQ =
626 += 4. Trouble Shooting: =
631 631  
632 -== 4.1 What is the usage of Multi Sampling and One Uplink? ==
628 +== 4.1 Checklist for debuging Network Connection issue. Signal Strenght:99 issue. ==
633 633  
634 -The NB series has the feature for Multi Sampling and one uplink. See one of them
635 -
636 -[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/SN50v3-NB_BN-IoT_Sensor_Node_User_Manual/#H2.5Multi-SamplingsandOneuplink>>http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/SN50v3-NB_BN-IoT_Sensor_Node_User_Manual/#H2.5Multi-SamplingsandOneuplink]]
637 -
638 -User can use this feature for below purpose:
639 -
640 -1. **Reduce power consumption**. The NB-IoT transmit power is much more higher than the sensor sampling power. To save battery life, we can sampling often and send in one uplink.
641 -1. Give more sampling data points.
642 -1. Increase reliable in transmission. For example. If user set
643 -1*. **AT+TR=1800** ~/~/ The unit is seconds, and the default is to record data once every 1800 seconds (30 minutes, the minimum can be set to 180 seconds)
644 -1*. **AT+NOUD=24** ~/~/  The device uploads 24 sets of recorded data by default. Up to 32 sets of record data can be uploaded.
645 -1*. **AT+TDC=7200**  ~/~/ Uplink every 2 hours.
646 -1*. this will mean each uplink will actually include the 6 uplink data (24 set data which cover 12 hours). So if device doesn;t lost 6 continue data. There will not data lost.
647 -
648 -= 5. Trouble Shooting: =
649 -
650 -== 5.1 Checklist for debuging Network Connection issue. Signal Strenght:99 issue. ==
651 -
652 652  There are many different providers provide NB-IoT service in the world. They might use different band, different APN & different operator configuration. Which makes connection to NB-IoT network is complicate.
653 653  
654 654  If end device successfully attached NB-IoT Network, User can normally see the signal strengh as below (between 0~~31)
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672 672  
673 673  If you have check all above and still fail. please send console log files (as many as possible) to [[support@dragino.com>>mailto:support@dragino.com]] so we can check.
674 674  
675 -
676 -== 5.2 Issue: "NBIOT did not respond" ==
677 -
678 -(% class="box errormessage" %)
679 -(((
680 -11:24:22.397 [44596]NBIOT did not respond.
681 -11:24:24.315 [46530]NBIOT did not respond.
682 -11:24:26.256 [48464]NBIOT did not respond.
683 -11:24:28.196 [50398]NBIOT did not respond.
684 -11:24:30.115 [52332]NBIOT did not respond.
685 -11:24:32.127 [54266]NBIOT did not respond.
686 -11:24:32.127 [54299]Restart the module...
687 -11:24:39.181 [61332]No response when shutting down
688 -)))
689 -
690 -This issue might due to initiate issue for NB-IoT module. In this case, please try:
691 -
692 -1) Open Enclosure
693 -
694 -2) Power off device by pull out the power on Jumper
695 -
696 -3) Power on device by connect back the power jumper.
697 -
698 -4) push reset button.
699 -
700 -[[image:image-20240208001740-1.png]]
701 -
702 -
703 -== 5.3 Issue: "Failed to readI MSI number" ==
704 -
705 -(% class="box errormessage" %)
706 -(((
707 -[18170]Failed to read IMSI:1umber.
708 -[20109]Failed to read IMSI numoer.
709 -[22048]Failed to read IMSI number.
710 -[29842lRestart the module...
711 -)))
712 -
713 -Make sure that the SIM card is insert in correct direction and device is power off/on during insert. Here is reference link: [[Insert SIM Card>>||anchor="H2.1GeneralConfiguretoattachnetwork"]].
714 -
715 -
716 -== 5.4 Why sometime the AT Command is slow in reponse? ==
717 -
718 -When the MCU is communicating with the NB-IoT module, the MCU response of AT Command will become slower, it might takes several seconds to response.
719 -
720 -[[image:image-20240226111928-1.png]]
721 -
722 -
723 723  
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