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Author

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1		-XWiki.Xiaoling
	1	+XWiki.ting

Content

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1	1	(% style="text-align:center" %)
2	2	[[image:image-20220709085040-1.png||height="542" width="524"]]
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262	262
263	263	* (% style="color:blue" %)**AT+PRO=2   ** (%%) ~/~/  Set to use UDP protocol to uplink
264	264	* (% style="color:blue" %)**AT+SERVADDR=120.24.4.116,5601   ** (%%) ~/~/  to set UDP server address and port
265		-* (% style="color:blue" %)**AT+CFM=1       ** (%%) ~/~/  If the server does not respond, this command is unnecessary
266	266
267	267	[[image:1657330501006-241.png]]
268	268
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371	371	Each time the device uploads a data package, 8 sets of recorded data will be attached. Up to 32 sets of recorded data can be uploaded.
372	372
373	373	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:490px" %)
374		-|(% style="background-color:#4F81BD;color:white; width:60px" %)**Size(bytes)**|(% style="background-color:#4F81BD;color:white; width:40px" %)**8**|(% style="background-color:#4F81BD;color:white; width:25px" %)**2**|(% style="background-color:#4F81BD;color:white; width:25px" %)**2**|(% style="background-color:#4F81BD;color:white; width:60px" %)**1**|(% style="background-color:#4F81BD;color:white; width:25px" %)**1**|(% style="background-color:#4F81BD;color:white; width:40px" %)**1**|(% style="background-color:#4F81BD;color:white; width:40px" %)**2**|(% style="background-color:#4F81BD;color:white; width:70px" %)**4**|(% style="background-color:#4F81BD;color:white; width:40px" %)**2**|(% style="background-color:#4F81BD;color:white; width:65px" %)**4**
	375	+|(% style="background-color:#4f81bd; color:white; width:60px" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white; width:40px" %)**8**|(% style="background-color:#4f81bd; color:white; width:25px" %)**2**|(% style="background-color:#4f81bd; color:white; width:25px" %)**2**|(% style="background-color:#4f81bd; color:white; width:60px" %)**1**|(% style="background-color:#4f81bd; color:white; width:25px" %)**1**|(% style="background-color:#4f81bd; color:white; width:40px" %)**1**|(% style="background-color:#4f81bd; color:white; width:40px" %)**2**|(% style="background-color:#4f81bd; color:white; width:70px" %)**4**|(% style="background-color:#4f81bd; color:white; width:40px" %)**2**|(% style="background-color:#4f81bd; color:white; width:65px" %)**4**
375	375	|(% style="width:95px" %)Value|(% style="width:84px" %)Device ID|(% style="width:44px" %)Ver|(% style="width:48px" %)BAT|(% style="width:123px" %)Signal Strength|(% style="width:55px" %)MOD|(% style="width:80px" %)Interrupt|(% style="width:77px" %)Distance|(% style="width:94px" %)Timestamp|(% style="width:77px" %)Distance|(% style="width:116px" %)Timestamp.......
376	376
377	377	If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the NDDS75 uplink data.
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572	572
573	573	By default, NDDS75 prints the downlink payload to console port.
574	574
575		-(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:520px" %)
576		-|(% style="background-color:#4F81BD;color:white; width:208px" %)**Downlink Control Type**|(% style="background-color:#4F81BD;color:white; width:56px" %)**FPort**|(% style="background-color:#4F81BD;color:white; width:100px" %)**Type Code**|(% style="background-color:#4F81BD;color:white; width:154px" %)**Downlink payload size(bytes)**
	576	+(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:515px" %)
	577	+|(% style="background-color:#4f81bd; color:white; width:208px" %)**Downlink Control Type**|(% style="background-color:#4f81bd; color:white; width:56px" %)**FPort**|(% style="background-color:#4f81bd; color:white; width:100px" %)**Type Code**|(% style="background-color:#4f81bd; color:white; width:151px" %)**Downlink payload size(bytes)**
577	577	|(% style="width:208px" %)TDC (Transmit Time Interval)|(% style="width:56px" %)Any|(% style="width:100px" %)01|(% style="width:154px" %)4
578	578	|(% style="width:208px" %)RESET|(% style="width:56px" %)Any|(% style="width:100px" %)04|(% style="width:154px" %)2
579	579	|(% style="width:208px" %)INTMOD|(% style="width:56px" %)Any|(% style="width:100px" %)06|(% style="width:154px" %)4
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786	786	AT+URI            :  Resource parameters
787	787
788	788
789		-(% style="color:#037691" %)**UDP Management**
790	790
791		-AT+CFM          :  Upload confirmation mode (only valid for UDP)
792		-
793		-
794	794	(% style="color:#037691" %)**MQTT Management**
795	795
796	796	AT+CLIENT  :  Get or Set MQTT client