<
From version < 108.1 >
edited by Mengting Qiu
on 2024/08/22 11:15
To version < 110.1 >
edited by Mengting Qiu
on 2024/08/27 15:01
>
Change comment: Uploaded new attachment "image-20240827150121-5.png", version {1}

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849 849  [[image:image-20240820113015-60.png]]
850 850  
851 -== (% data-sider-select-id="765eceff-93b1-40ee-800b-b7b7d022ef8a" %)6.3 What is the Downlink Command by the NB device?(%%) ==
851 +== (% data-sider-select-id="765eceff-93b1-40ee-800b-b7b7d022ef8a" %)6.3 What is the Downlink Command by the -CB device?(%%) ==
852 852  
853 853  (% data-sider-select-id="bb6e9353-0c3f-473c-938d-4b416c9a03e6" %)
854 854  === UDP: ===
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902 902  
903 903  
904 904  ​
905 +
906 +== 6.4 What if the signal is good but the domain name resolution fails? ==
907 +
908 +
909 +If the domain name resolution fails, first check whether the domain name is correct, users can use their own website domain name resolution tool to verify the domain name.
910 +
911 +If the domain name is correct, but the domain name cannot be resolved, the user can turn off the domain name resolution function(AT+GDNS=1) and use the domain name communication directly.
912 +
913 +* Set the DNS
914 +
915 +(% style="color:blue" %)**AT Command: AT+GDNS**
916 +
917 +**AT+GDNS=0**  ~/~/Default. Automatically resolves the domain name and uses the resolved IP to communicate.
918 +
919 +**AT+GDNS=1  **~/~/Disabling Domain name resolution. Use the domain name directly to communicate.
920 +
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.**
922 +
923 +Example:
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