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Last modified by Mengting Qiu on 2025/07/17 10:51
From version 231.2
edited by Mengting Qiu
on 2025/06/19 14:35
Change comment: There is no comment for this version
To version 231.4
edited by Mengting Qiu
on 2025/07/03 18:48
Change comment: There is no comment for this version

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1043 1043  (% data-sider-select-id="90b80f1a-e924-4c8a-afc5-4429e019a657" %)
1044 1044  === **MQTT Protocol:** ===
1045 1045  
1046 -Supports both **JSON-format** and **HEX-format** downlink commands (corresponding to AT commands).
1046 +==== **1. HEX-format** ====
1047 1047  
1048 +Supports **HEX-format** downlink commands (corresponding to AT commands).
1049 +
1048 1048  //Example~:// For the S31-NB's uplink interval modification (AT+TDC=900):
1049 1049  
1050 1050  * HEX format: (% style="color:blue" %)**01000384**(%%)  ~/~/ There are no Spaces. 0x0384(H)=900(D), that is, modify TDC to 900 seconds.
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1061 1061  [[image:1750035004731-376.png||height="276" width="557"]]
1062 1062  
1063 1063  
1066 +==== **2. JSON-format ** ====
1067 +
1068 +===== **2. 1 JSON format template.** =====
1069 +
1070 +All -CB nodes support downlink configuration modification using (% style="color:blue" %)**JSON format templates.**
1071 +
1072 +We can use templates to configure multiple commands AT once. Users only need to modify the parameters of the required AT commands in the correct template for each device.
1073 +Template.
1074 +
1075 +Take the template of DDS75-CB as an example:
1076 +
1077 +
1064 1064  **Template for Batch Configuration:**
1065 1065  
1066 1066  We can also use templates to configure multiple commands AT once. Users only need to modify the parameters of the required AT commands in the correct template for each device.
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1238 1238  
1239 1239  
1240 1240  
1241 -== 6.8 ==
1255 +== 6.8 ==
1242 1242  
1243 1243  
1244 1244