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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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645	645	1*. **AT+TDC=7200**  ~/~/ Uplink every 2 hours.
646	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	647
	644	+
648	648	= 5. Trouble Shooting: =
649	649
650	650	== 5.1 Checklist for debuging Network Connection issue. Signal Strenght:99 issue. ==
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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 reponse.
719		-
720		-[[image:image-20240226111928-1.png]]
721		-
722		-
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