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901	901	[[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/]]
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903	903
904	904	== 6.4 What if the signal is good but the domain name resolution fails? ==
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917	917	**AT+GDNS=0**  ~/~/Default. Automatically resolves the domain name and uses the resolved IP to communicate.
918	918
919		-**AT+GDNS=1    **~/~/Disabling Domain name resolution. Use the domain name directly to communicate.
	921	+**AT+GDNS=1  **~/~/Disabling Domain name resolution. Use the domain name directly to communicate.
920	920
921	921	(% style="color:red" %)**Note: For -CB products, with the exception of AT+PRO=2,5, all protocols and payload formats support direct domain communication.**
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925	925	[[image:image-20240827150121-5.png||height="476" width="680"]][[image:image-20240827145055-4.png||height="484" width="678"]]
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927	927
928		-== 6.5 GPS debugging ==
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930	930
931		-The following are three related AT commands that introduce GPS functions.
932	932
933		-* **Turn on/off GPS**
934	934
935		-(% style="color:blue" %)**AT Command: **(% style="color:#037691" %)**AT+GPS **
936	936
937		-**Ex1:  **AT+GPS=0  ~/~/ Turn off GPS
938		-
939		-**Ex2:  **AT+GPS=1  ~/~/ Turn on GPS
940		-
941		-(% style="color:blue" %)**Downlink command:**(%%)** (% style="color:#037691" %)0x11(%%)**
942		-
943		-Format: Command Code (0x11) followed by 1 byte.
944		-
945		-Example:  Downlink Payload: **11 01   **~/~/ AT+GPS=1
946		-
947		-
948		-* **Set GNSS open time**
949		-
950		-Extend the time to turn on GNSS. The automatic GPS location time is extended when the node is activated.
951		-
952		-(% style="color:blue" %)**AT Command: **(% style="color:#037691" %)**AT+GNSST**
953		-
954		-Example: AT+GNSST=30  ~/~/ Set the GPS positioning time to 30 seconds
955		-
956		-(% style="color:blue" %)**Downlink command:**(%%)** (% style="color:#037691" %)0x10(%%)**
957		-
958		-Format: Command Code (0x10) followed by 2 bytes.
959		-
960		-Example:  Downlink Payload: **10 00 1E    **~/~/ AT+GNSST=30
961		-
962		-
963		-* **Set GPS positioning interval**
964		-
965		-Feature: Set GPS positioning interval (unit: hour).
966		-
967		-When GPS is enabled, the node automatically locates and uplinks each time it passes **GTDC time** after activation.
968		-
969		-(% style="color:blue" %)**AT Command: **(% style="color:#037691" %)**AT+GTDC**
970		-
971		-Example: AT+GTDC=24  ~/~/ Set the GPS positioning interval to 24h.
972		-
973		-(% style="color:blue" %)**Downlink command:**(%%)** (% style="color:#037691" %)0x12(%%)**
974		-
975		-Format: Command Code (0x12) followed by 3 bytes.
976		-
977		-Example: 24 hours:  24(D)=0x18(H)
978		-
979		- Downlink Payload: **12 00 00 18   **~/~/ AT+GTDC=24
980		-
981		-
982		-Indoor GPS signal is very weak, outdoor positioning is generally recommended.
983		-
984		-
985		-
986		-
987		-
988		-
989		-
990		-
991	991

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