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Last modified by Mengting Qiu on 2025/07/17 10:51
From version 227.2
edited by Mengting Qiu
on 2025/06/16 08:48
Change comment: There is no comment for this version
To version 229.15
edited by Mengting Qiu
on 2025/06/16 09:25
Change comment: There is no comment for this version

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1028 1028  
1029 1029  
1030 1030  Firstly, it is recommended that users upgrade the firmware of the -NB node to the latest version, as the processing method for downlink commands varies depending on the firmware version. Below, we will introduce the latest downlink command format.
1031 -(% style="color:red" %)**Note: **
1032 1032  
1033 1033  (% data-sider-select-id="bb6e9353-0c3f-473c-938d-4b416c9a03e6" %)
1034 1034  === **UDP Protocol:** ===
1035 1035  
1036 -Only supports valid **HEX-format downlink commands** corresponding to AT command
1035 +Only supports valid **HEX-format downlink commands** corresponding to AT command.
1037 1037  
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 +Downward format: (% style="color:blue" %)**01000384**(%%)  ~/~/ There are no Spaces. 0x0384(H)=900(D), that is, modify TDC to 900 seconds.
1039 +
1040 +[[image:1750035991532-434.png||height="237" width="495"]]
1041 +
1042 +
1038 1038  (% data-sider-select-id="90b80f1a-e924-4c8a-afc5-4429e019a657" %)
1039 -=== MQTT: ===
1044 +=== **MQTT Protocol:** ===
1040 1040  
1046 +Supports both **JSON-format** and **HEX-format** downlink commands (corresponding to AT commands).
1041 1041  
1042 -Json：
1048 +//Example~:// For the S31-NB's uplink interval modification (AT+TDC=900):
1043 1043  
1044 -The Json format in MQTT mode needs to be configured with all commands.
1045 -If you have configurations that need to be changed, please change them in the template below.
1050 +* HEX format: (% style="color:blue" %)**01000384**(%%)  ~/~/ There are no Spaces. 0x0384(H)=900(D), that is, modify TDC to 900 seconds.
1051 +* JSON format: (% style="color:blue" %)**{AT+TDC=900}  **(%%)~/~/ The correct format is (% style="color:blue" %)**{AT Command}**(%%). No extra characters other than valid AT commands can be added within {}.
1052 +
1053 +
1054 +
1055 +**Template for Batch Configuration:**
1056 +
1057 +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.
1058 +
1059 +
1046 1046  Template:
1047 1047  
1048 1048  {
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1068 1068  "AT+TEMPALARM3":"0"
1069 1069  }
1070 1070  
1071 -Hex：
1072 1072  
1073 -MQTT's hex format. Since many commands need to support strings, only a few commands are supported.
1086 +[[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/]]
1074 1074  
1075 -The supported commands are consistent with LoRaWAN's hex commands.
1076 -Please refer to the following link to obtain the hex format:
1077 1077  
1078 -[[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/]]
1089 +(% style="color:red" %)**Note:**
1079 1079  
1091 +(% 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.**
1080 1080  
1093 +(% 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.**
1094 +
1095 +(% 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.**
1096 +
1097 +[[image:1750035004731-376.png||height="276" width="557"]]
1098 +
1099 +
1081 1081  == (% data-sider-select-id="765eceff-93b1-40ee-800b-b7b7d022ef8a" %)6.6 How to get the debug log for further analyze?(%%) ==
1082 1082  
1083 1083  
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