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Author

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1		-XWiki.Edwin
	1	+XWiki.Bei

Content

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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"]].
786	786
787	787
788		-== 6.4 Why sometime the AT Command is slow in reponse? ==
	788	+== (% data-sider-select-id="765eceff-93b1-40ee-800b-b7b7d022ef8a" %)6.4 Why sometime the AT Command is slow in reponse?(%%) ==
789	789
790	790
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]]
	794	+
	795	+
	796	+== (% data-sider-select-id="765eceff-93b1-40ee-800b-b7b7d022ef8a" %)6.5 What is the Downlink Command by the NB device?(%%) ==
	797	+
	798	+
	799	+NB devices use downlink commands in Json format.
	800	+Its downlink command is the same as the AT command, but brackets are required.
	801	+Example:
	802	+
	803	+{AT+TDC=300}
	804	+
	805	+