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Last modified by Mengting Qiu on 2025/07/03 18:55
From version 229.2
edited by Mengting Qiu
on 2025/06/16 09:07
Change comment: There is no comment for this version
To version 227.1
edited by Mengting Qiu
on 2025/06/13 19:43
Change comment: There is no comment for this version

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1032 1032  (% data-sider-select-id="bb6e9353-0c3f-473c-938d-4b416c9a03e6" %)
1033 1033  === **UDP Protocol:** ===
1034 1034  
1035 -Only supports valid **HEX-format downlink commands** corresponding to AT command.
1035 +Only supports valid **HEX-format downlink commands** corresponding to AT command
1036 1036  
1037 -Take the AT+TDC command of S31-NB as an example, that is, only the valid HEX format downstream command corresponding to the AT+TDC command can be used:
1038 -
1039 -
1040 -[[image:1750035991532-434.png||height="237" width="495"]]
1041 -
1042 -
1043 1043  (% data-sider-select-id="90b80f1a-e924-4c8a-afc5-4429e019a657" %)
1044 1044  === MQTT: ===
1045 1045  
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1083 1083  [[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/]]
1084 1084  
1085 1085  
1086 -(% style="color:red" %)**Note:**
1087 -
1088 -(% style="color:red" %)**1. Only when the correct and valid download command is used and the format is correct can the device be configured through the download command. Invalid download content cannot be processed by the device and will be automatically restarted.**
1089 -
1090 -(% style="color:red" %)**2. Devices designed with downlink commands can utilize different downlink formats (e.g., JSON or HEX) for configuration. However, regardless of the format, the functionality is strictly limited to the downlink command specifications described in the user manual's AT command explanation.**
1091 -
1092 -(% style="color:red" %)**For example, the HEX-format downlink command corresponding to AT+TDC can only be used to configure TDC and cannot be used for queries. There is no HEX-format downlink command equivalent to AT+TDC=? , so querying TDC via downlink is not supported.**
1093 -
1094 -[[image:1750035004731-376.png||height="276" width="557"]]
1095 -
1096 -
1097 1097  == (% data-sider-select-id="765eceff-93b1-40ee-800b-b7b7d022ef8a" %)6.6 How to get the debug log for further analyze?(%%) ==
1098 1098  
1099 1099  
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