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Last modified by Mengting Qiu on 2025/07/03 18:49
From version 144.1
edited by Mengting Qiu
on 2025/07/03 18:34
Change comment: Uploaded new attachment "1751538862245-924.png", version {1}
To version 142.1
edited by Mengting Qiu
on 2025/06/16 10:15
Change comment: There is no comment for this version

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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>>||anchor="H1.ConfigureFrequencyBand"]].
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]].
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  
... ... @@ -1013,14 +1013,12 @@
1013 1013  
1014 1014  === **MQTT Protocol:** ===
1015 1015  
1016 -==== **1. HEX-format** ====
1016 +Supports both **JSON-format** and **HEX-format** downlink commands (corresponding to AT commands).
1017 1017  
1018 -Supports **HEX-format** downlink commands (corresponding to AT commands).
1019 -
1020 1020  //Example~:// For the S31-CB's uplink interval modification (AT+TDC=900):
1021 1021  
1022 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 {}.
1021 +* 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 1024  
1025 1025  (% style="color:red" %)**Note:**
1026 1026  
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1031 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 1032  
1033 1033  
1034 -==== **2. JSON-format ** ====
1032 +**Template for Batch Configuration:**
1035 1035  
1036 -All -CB nodes support downlink configuration modification using JSON format templates.
1034 +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.
1035 +Template:
1037 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 -
1043 1043  {
1044 1044  "AT+SERVADDR":"119.91.62.30,1882",
1045 1045  "AT+CLIENT":"JwcXKjQBNhQ2JykDDAA5Ahs",
... ... @@ -1052,20 +1052,17 @@
1052 1052  "AT+APN":"NULL",
1053 1053  "AT+5VT":"0",
1054 1054  "AT+PRO":"3,5",
1055 -"AT+TR":"15",
1056 -"AT+NOUD":"8",
1049 +"AT+TR":"900",
1050 +"AT+NOUD":"0",
1057 1057  "AT+CSQTIME":"5",
1058 -"AT+GDNS":"0",
1052 +"AT+DNSTIMER":"0",
1059 1059  "AT+TLSMOD":"0,0",
1060 1060  "AT+MQOS":"0",
1061 -"AT+IPTYPE":"0",
1062 -"AT+GTDC":"0",
1063 -"AT+GNSST":"10",
1064 -"AT+GPS":"0"
1055 +"AT+TEMPALARM1":"0",
1056 +"AT+TEMPALARM2":"10",
1057 +"AT+TEMPALARM3":"0"
1065 1065  }
1066 1066  
1067 -
1068 -
1069 1069  **Instructions for Using the Template:**
1070 1070  
1071 1071  1. Modify the parameters for each AT command in the template as needed.
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