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Last modified by Mengting Qiu on 2025/07/03 18:49
From version 144.13
edited by Mengting Qiu
on 2025/07/03 18:43
Change comment: There is no comment for this version
To version 140.1
edited by Mengting Qiu
on 2025/03/08 11:35
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  
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997 997  [[image:image-20240820113015-60.png]]
998 998  
999 999  
1000 -== (% data-sider-select-id="765eceff-93b1-40ee-800b-b7b7d022ef8a" %)7.3 (%%)What is the Downlink Command Format for CB Devices? ==
1000 +== (% data-sider-select-id="765eceff-93b1-40ee-800b-b7b7d022ef8a" %)7.3 What is the Downlink Command by the -CB device?(%%) ==
1001 1001  
1002 +(% data-sider-select-id="bb6e9353-0c3f-473c-938d-4b416c9a03e6" %)
1003 +=== UDP: ===
1002 1002  
1003 -Firstly, it is recommended that users upgrade the firmware of the -CB 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.
1005 +(% data-sider-select-id="14a4790e-7faa-4508-a4dd-7605a53f1cb3" %)
1006 +Its downlink command is the same as the AT command, but brackets are required.
1007 +Example:
1004 1004  
1005 -=== **UDP Protocol:** ===
1009 +{AT+TDC=300}
1006 1006  
1007 -Only supports valid **HEX-format downlink commands** corresponding to AT command.
1008 1008  
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 -Downward format: (% style="color:blue" %)**01000384**(%%)  ~/~/ There are no Spaces. 0x0384(H)=900(D), that is, modify TDC to 900 seconds.
1012 +(% data-sider-select-id="90b80f1a-e924-4c8a-afc5-4429e019a657" %)
1013 +=== MQTT: ===
1011 1011  
1012 -[[image:1750039871468-460.png||height="299" width="600"]]
1015 +Json：
1013 1013  
1014 -=== **MQTT Protocol:** ===
1017 +The Json format in MQTT mode needs to be configured with all commands.
1018 +If you have configurations that need to be changed, please change them in the template below.
1019 +Template:
1015 1015  
1016 -==== **1. HEX-format** ====
1017 -
1018 -Supports **HEX-format** downlink commands (corresponding to AT commands).
1019 -
1020 -//Example~:// For the S31-CB's uplink interval modification (AT+TDC=900):
1021 -
1022 -Downlink command: (% style="color:blue" %)**01000384**(%%)  ~/~/ There are no Spaces. 0x0384(H)=900(D), that is, modify TDC to 900 seconds.
1023 -
1024 -
1025 -==== **2. JSON-format ** ====
1026 -
1027 -===== **2. 1 JSON format template.** =====
1028 -
1029 -All -CB nodes support downlink configuration modification using (% style="color:blue" %)**JSON format templates.**
1030 -
1031 -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.
1032 -Template.
1033 -
1034 -Take the template of DDS75-CB as an example:
1035 -
1036 1036  {
1037 1037  "AT+SERVADDR":"119.91.62.30,1882",
1038 1038  "AT+CLIENT":"JwcXKjQBNhQ2JykDDAA5Ahs",
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1045 1045  "AT+APN":"NULL",
1046 1046  "AT+5VT":"0",
1047 1047  "AT+PRO":"3,5",
1048 -"AT+TR":"15",
1049 -"AT+NOUD":"8",
1033 +"AT+TR":"900",
1034 +"AT+NOUD":"0",
1050 1050  "AT+CSQTIME":"5",
1051 -"AT+GDNS":"0",
1036 +"AT+DNSTIMER":"0",
1052 1052  "AT+TLSMOD":"0,0",
1053 1053  "AT+MQOS":"0",
1054 -"AT+IPTYPE":"0",
1055 -"AT+GTDC":"0",
1056 -"AT+GNSST":"10",
1057 -"AT+GPS":"0"
1039 +"AT+TEMPALARM1":"0",
1040 +"AT+TEMPALARM2":"10",
1041 +"AT+TEMPALARM3":"0"
1058 1058  }
1059 1059  
1060 -Explanations of two special commands in the template: AT+TR (set the detection interval: 0 ~~ 255 minutes) and AT+NOUD (set the number of groups) correspond to parameters in AT+CLOCKLOG.
1044 +Hex：
1061 1061  
1062 -[[image:1751538862245-924.png]]
1046 +MQTT's hex format. Since many commands need to support strings, only a few commands are supported.
1063 1063  
1064 -**Instructions for Using the Template:**
1048 +The supported commands are consistent with LoRaWAN's hex commands.
1049 +Please refer to the following link to obtain the hex format:
1065 1065  
1066 -1. Modify the parameters for each AT command in the template as needed.
1067 -1. Send the entire template in one downlink command.
1051 +[[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/]]
1068 1068  
1069 -(% style="color:red" %)**Note:**
1070 1070  
1071 -* The template may vary depending on the device model.
1072 -* **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.
1073 -
1074 -
1075 -
1076 -===== **2.2 Support sending json format commands separately** =====
1077 -
1078 -Some models of nodes support sending json format commands separately：(% style="color:blue" %)**RS485-CB, LDS25-CB, CS01-CB, SDI-12-CB, SW3L-CB, WL03A-CB, PS-CB**
1079 -
1080 -//Example~:// For the PS-CB's uplink interval modification (AT+TDC=900):
1081 -
1082 -Downlink command:  (% 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 {}.
1083 -
1084 -
1085 -
1086 1086  == 7.4 What if the signal is good but the domain name resolution fails? ==
1087 1087  
1088 1088  
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