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Last modified by Mengting Qiu on 2025/07/03 18:49
From version 141.2
edited by Mengting Qiu
on 2025/06/16 10:11
Change comment: There is no comment for this version
To version 143.7
edited by Mengting Qiu
on 2025/07/03 18:31
Change comment: There is no comment for this version

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... ... @@ -982,7 +982,7 @@
982 982  
983 983  * Does your SIM card support NB-IoT network? If SIM card doesn't not specify support NB-IoT clearly, normally it doesn't support. You need to confirm with your operator.
984 984  * Do you configure the correct APN? [[Check here for APN settings>>http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H2.1GeneralConfiguretoattachnetwork]].
985 -* Do you lock the frequency band? This is the most case we see. [[Explain and Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H2.2SpeedUpNetworkAttachtime]].
985 +* Do you lock the frequency band? This is the most case we see. [[Explain and Instruction>>||anchor="H1.ConfigureFrequencyBand"]].
986 986  * Check if the device is attached to Carrier network but reject. (need to check with operator).
987 987  * Check if the antenna is connected firmly.
988 988  
... ... @@ -1006,20 +1006,40 @@
1006 1006  
1007 1007  Only supports valid **HEX-format downlink commands** corresponding to AT command.
1008 1008  
1009 -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:
1009 +Take the AT+TDC command of S31-CB as an example, that is, only the valid HEX format downstream command corresponding to the AT+TDC command can be used:
1010 1010  Downward format: (% style="color:blue" %)**01000384**(%%)  ~/~/ There are no Spaces. 0x0384(H)=900(D), that is, modify TDC to 900 seconds.
1011 1011  
1012 1012  [[image:1750039871468-460.png||height="299" width="600"]]
1013 1013  
1014 -(% data-sider-select-id="90b80f1a-e924-4c8a-afc5-4429e019a657" %)
1015 -=== MQTT: ===
1014 +=== **MQTT Protocol:** ===
1016 1016  
1017 -Json：
1016 +==== **1. HEX-format** ====
1018 1018  
1019 -The Json format in MQTT mode needs to be configured with all commands.
1020 -If you have configurations that need to be changed, please change them in the template below.
1021 -Template:
1018 +Supports **HEX-format** downlink commands (corresponding to AT commands).
1022 1022  
1020 +//Example~:// For the S31-CB's uplink interval modification (AT+TDC=900):
1021 +
1022 +* HEX format: (% style="color:blue" %)**01000384**(%%)  ~/~/ There are no Spaces. 0x0384(H)=900(D), that is, modify TDC to 900 seconds.
1023 +* 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 {}.
1024 +
1025 +(% style="color:red" %)**Note:**
1026 +
1027 +(% 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.**
1028 +
1029 +(% 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.**
1030 +
1031 +(% 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.**
1032 +
1033 +
1034 +==== **2. JSON-format ** ====
1035 +
1036 +All -CB nodes support downlink configuration modification using JSON format templates.
1037 +
1038 +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.
1039 +Template.
1040 +
1041 +Take the template of DDS75-CB as an example:
1042 +
1023 1023  {
1024 1024  "AT+SERVADDR":"119.91.62.30,1882",
1025 1025  "AT+CLIENT":"JwcXKjQBNhQ2JykDDAA5Ahs",
... ... @@ -1032,27 +1032,32 @@
1032 1032  "AT+APN":"NULL",
1033 1033  "AT+5VT":"0",
1034 1034  "AT+PRO":"3,5",
1035 -"AT+TR":"900",
1036 -"AT+NOUD":"0",
1055 +"AT+TR":"15",
1056 +"AT+NOUD":"8",
1037 1037  "AT+CSQTIME":"5",
1038 -"AT+DNSTIMER":"0",
1058 +"AT+GDNS":"0",
1039 1039  "AT+TLSMOD":"0,0",
1040 1040  "AT+MQOS":"0",
1041 -"AT+TEMPALARM1":"0",
1042 -"AT+TEMPALARM2":"10",
1043 -"AT+TEMPALARM3":"0"
1061 +"AT+IPTYPE":"0",
1062 +"AT+GTDC":"0",
1063 +"AT+GNSST":"10",
1064 +"AT+GPS":"0"
1044 1044  }
1045 1045  
1046 -Hex：
1047 1047  
1048 -MQTT's hex format. Since many commands need to support strings, only a few commands are supported.
1049 1049  
1050 -The supported commands are consistent with LoRaWAN's hex commands.
1051 -Please refer to the following link to obtain the hex format:
1069 +**Instructions for Using the Template:**
1052 1052  
1053 -[[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/]]
1071 +1. Modify the parameters for each AT command in the template as needed.
1072 +1. Send the entire template in one downlink command.
1054 1054  
1074 +(% style="color:red" %)**Note:**
1055 1055  
1076 +* The template may vary depending on the device model.
1077 +* **Currently, each specific template is being updated and tested**. 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.
1078 +
1079 +
1080 +
1056 1056  == 7.4 What if the signal is good but the domain name resolution fails? ==
1057 1057  
1058 1058