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63	63	After connection is successful, user can use (% style="color:#037691" %)**AT+QENG=0 **(%%) to check which band is actually in used.
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	65	+By default, device will search network for 5 minutes. User can set the time to 10 minutes by (% style="color:#037691" %)**AT+CSQTIME=10 **(%%)so it can search longer.
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66	66	See bands used for different provider:** [[NB-IoT Deployment , Bands, Operator list>>http://wiki.dragino.com/xwiki/bin/view/Main/NB-IoT%20Deployment%20%2C%20Bands%2C%20Operator%20list/]]**
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...	...	@@ -634,8 +634,14 @@
634	634	[[image:image-20230807233631-2.png]]
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636	636
	638	+== 3.9 AWS Connection ==
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638	638
	641	+Users can refer to [[Dragino NB device connection to AWS platform instructions>>http://wiki.dragino.com/xwiki/bin/view/Dragino%20NB%20device%20connection%20to%20AWS%20platform%20instructions/#H1.LogintotheplatformandfindIoTcore]]
	642	+
	643	+
	644	+
	645	+
639	639	= 4. MQTT/UDP/TCP downlink =
640	640
641	641	== 4.1 MQTT (via MQTT.fx) ==
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785	785	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"]].
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787	787
788		-== 6.4 Why sometime the AT Command is slow in reponse? ==
	795	+== (% data-sider-select-id="765eceff-93b1-40ee-800b-b7b7d022ef8a" %)6.4 Why sometime the AT Command is slow in reponse?(%%) ==
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791	791	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.
792	792
793	793	[[image:image-20240226111928-1.png]]
	801	+
	802	+
	803	+== (% data-sider-select-id="765eceff-93b1-40ee-800b-b7b7d022ef8a" %)6.5 What is the Downlink Command by the NB device?(%%) ==
	804	+
	805	+(% data-sider-select-id="bb6e9353-0c3f-473c-938d-4b416c9a03e6" %)
	806	+=== UDP: ===
	807	+
	808	+(% data-sider-select-id="14a4790e-7faa-4508-a4dd-7605a53f1cb3" %)
	809	+Its downlink command is the same as the AT command, but brackets are required.
	810	+Example:
	811	+
	812	+{AT+TDC=300}
	813	+
	814	+
	815	+(% data-sider-select-id="90b80f1a-e924-4c8a-afc5-4429e019a657" %)
	816	+=== MQTT: ===
	817	+
	818	+Json：
	819	+
	820	+The Json format in MQTT mode needs to be configured with all commands.
	821	+If you have configurations that need to be changed, please change them in the template below.
	822	+Template:
	823	+
	824	+{
	825	+"AT+SERVADDR":"119.91.62.30,1882",
	826	+"AT+CLIENT":"JwcXKjQBNhQ2JykDDAA5Ahs",
	827	+"AT+UNAME":"usenamedragino",
	828	+"AT+PWD":"passworddragino",
	829	+"AT+PUBTOPIC":"123",
	830	+"AT+SUBTOPIC":"321",
	831	+"AT+TDC":"7200",
	832	+"AT+INTMOD":"0",
	833	+"AT+APN":"NULL",
	834	+"AT+5VT":"0",
	835	+"AT+PRO":"3,5",
	836	+"AT+TR":"900",
	837	+"AT+NOUD":"0",
	838	+"AT+CSQTIME":"5",
	839	+"AT+DNSTIMER":"0",
	840	+"AT+TLSMOD":"0,0",
	841	+"AT+MQOS":"0",
	842	+"AT+TEMPALARM1":"0",
	843	+"AT+TEMPALARM2":"10",
	844	+"AT+TEMPALARM3":"0"
	845	+}
	846	+
	847	+Hex：
	848	+
	849	+MQTT's hex format. Since many commands need to support strings, only a few commands are supported.
	850	+
	851	+The supported commands are consistent with LoRaWAN's hex commands.
	852	+Please refer to the following link to obtain the hex format:
	853	+
	854	+[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/]]
	855	+
	856	+