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Last modified by Mengting Qiu on 2025/07/03 18:55
From version 226.3
edited by Mengting Qiu
on 2025/06/13 19:41
Change comment: There is no comment for this version
To version 229.1
edited by Mengting Qiu
on 2025/06/16 09:06
Change comment: Uploaded new attachment "1750035991532-434.png", version {1}

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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 -Example: For the S31-NB’s uplink interval modification command (AT+TDC), the downlink command should be:
1038 1038  
1039 1039  
1040 -
1041 1041  (% data-sider-select-id="90b80f1a-e924-4c8a-afc5-4429e019a657" %)
1042 1042  === MQTT: ===
1043 1043  
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1081 1081  [[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/]]
1082 1082  
1083 1083  
1082 +(% style="color:red" %)**Note:**
1083 +
1084 +(% 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.**
1085 +
1086 +(% 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.**
1087 +
1088 +(% 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.**
1089 +
1090 +[[image:1750035004731-376.png||height="276" width="557"]]
1091 +
1092 +
1084 1084  == (% data-sider-select-id="765eceff-93b1-40ee-800b-b7b7d022ef8a" %)6.6 How to get the debug log for further analyze?(%%) ==
1085 1085  
1086 1086  
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