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Last modified by Mengting Qiu on 2025/07/17 10:51
From version 228.2
edited by Mengting Qiu
on 2025/06/16 08:51
Change comment: There is no comment for this version
To version 229.17
edited by Mengting Qiu
on 2025/06/16 09:26
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  
1032 +(% data-sider-select-id="bb6e9353-0c3f-473c-938d-4b416c9a03e6" %)
1033 +=== **UDP Protocol:** ===
1033 1033  
1034 -[[image:1750035004731-376.png]]
1035 +Only supports valid **HEX-format downlink commands** corresponding to AT command.
1035 1035  
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.
1036 1036  
1037 -(% data-sider-select-id="bb6e9353-0c3f-473c-938d-4b416c9a03e6" %)
1038 -=== **UDP Protocol:** ===
1040 +[[image:1750035991532-434.png||height="237" width="495"]]
1039 1039  
1040 -Only supports valid **HEX-format downlink commands** corresponding to AT command
1041 1041  
1042 1042  (% data-sider-select-id="90b80f1a-e924-4c8a-afc5-4429e019a657" %)
1043 -=== MQTT: ===
1044 +=== **MQTT Protocol:** ===
1044 1044  
1046 +Supports both **JSON-format** and **HEX-format** downlink commands (corresponding to AT commands).
1045 1045  
1046 -Json：
1048 +//Example~:// For the S31-NB's uplink interval modification (AT+TDC=900):
1047 1047  
1048 -The Json format in MQTT mode needs to be configured with all commands.
1049 -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 +(% style="color:red" %)**Note:**
1054 +
1055 +(% 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.**
1056 +
1057 +(% 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.**
1058 +
1059 +(% 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.**
1060 +
1061 +[[image:1750035004731-376.png||height="276" width="557"]]
1062 +
1063 +
1064 +**Template for Batch Configuration:**
1065 +
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.
1050 1050  Template:
1051 1051  
1052 1052  {
... ... @@ -1072,16 +1072,19 @@
1072 1072  "AT+TEMPALARM3":"0"
1073 1073  }
1074 1074  
1075 -Hex：
1092 +**Instructions for Using the Template:**
1076 1076  
1077 -MQTT's hex format. Since many commands need to support strings, only a few commands are supported.
1094 +1. Modify the parameters for each AT command in the template as needed.
1095 +1. Send the entire template in one downlink command.
1078 1078  
1079 -The supported commands are consistent with LoRaWAN's hex commands.
1080 -Please refer to the following link to obtain the hex format:
1097 +**Note:**
1081 1081  
1082 -[[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/]]
1099 +* The template may vary depending on the device model.
1100 +* If you need a template for your specific device, please contact **Dragino Technical Support** at [[support@dragino.com>>url:https://mailto:support@dragino.com/]] to request the latest downlink template.
1083 1083  
1084 1084  
1103 +
1104 +
1085 1085  == (% data-sider-select-id="765eceff-93b1-40ee-800b-b7b7d022ef8a" %)6.6 How to get the debug log for further analyze?(%%) ==
1086 1086  
1087 1087  
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