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15	15	This MQTT forward instruction is for below devices:
16	16
17	17	* Firmware Version > LG02_LG08-5.3.1580178039 [[Firmware Download>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]]
18		-* LG01N, OLG01N ((% style="color:red" %)**Warning**(%%): LG01-P LG01-S use another instruction: [[MQTT for LG01-P/LG01S>>doc:Through MQTT to upload data.WebHome]])
	18	+* LG01N, OLG01N ((% style="color:red" %)**Warning**(%%): LG01-P LG01-S use another instruction: [[MQTT for LG01-P/LG01S>>doc:Main.Through MQTT to upload data.WebHome]])
19	19	* LG02, OLG02
20	20	* LG308, DLOS8
21	21	* LPS8
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22	22	* LIG16
23	23	* MS14 series if installed with the same firmware. (in this case, the MQTT forward will work , but no LoRa support)
24	24
	25	+
25	25	= 2.  Firmware Change Log for MQTT feature =
26	26
27	27
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32	32	* LG02_LG08-5.3.1580178039
33	33	** Initiate version
34	34
	36	+
35	35	= 3.  MQTT forward operating principle =
36	36
37		-
38	38	== 3.1  Network Structure ==
39	39
40	40
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48	48	General MQTT structure
49	49
50	50
51		-
52	52	== 3.2  How sensor data is forwarded ==
53	53
54	54
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62	62
63	63	(((
64	64	The data flow works as below diagram.
65		-
66		-
67	67	)))
68	68
69	69	[[image:image-20220527134000-2.png]]
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96	96	Downstream path
97	97
98	98
99		-
100	100	== 3.3  Macro Definition ==
101	101
102	102
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105	105	(((
106	106	Currently the (% style="color:#4f81bd" %)**-t (topic)**(%%) and (% style="color:#4f81bd" %)**-m (message)**(%%) support Macros.
107	107
108		-
109	109
110	110	)))
111	111
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118	118	* USERNAME: User ID (-u)
119	119	* HOSTNAME: Device Hostname
120	120
	117	+
121	121	=== 3.3.2  -m message macro ===
122	122
123	123
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127	127	* META: Completely sensor data with time stamp and rssi
128	128	* JSON: Convert META to json format.
129	129
	127	+
130	130	=== 3.3.3  Example for Macro ===
131	131
132	132
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152	152	)))
153	153
154	154
155		-
156	156	== 3.4  Modify the MQTT to support more options ==
157	157
158	158
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280	280	)))
281	281
282	282
283		-
284	284	= 4.  Example to communicate to a simple MQTT server =
285	285
286		-
287	287	== 4.1  Overview ==
288	288
289	289
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318	318	Downstream: Subscribe a topic to get downstream
319	319
320	320
321		-
322	322	== 4.3  Simulate via Dragino Command Line ==
323	323
324	324
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340	340	mosquitto_pub
341	341
342	342
343		-
344	344	(% style="color:blue" %)**For Downstream**
345	345
346	346	Use [[mosquitto_sub>>url:https://mosquitto.org/man/mosquitto_sub-1.html]] to subscribe the change on the topic.
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350	350	mosquitto_sub
351	351
352	352
353		-
354	354	== 4.4  Configure Dragino UI for MQTT connection ==
355	355
356	356
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374	374	forward to MQTT
375	375
376	376
377		-
378	378	=== 4.4.1  Configure the MQTT Client for Upstream ===
379	379
380	380
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395	395	MQTT Publish configure
396	396
397	397
398		-
399	399	[[image:image-20220527135929-13.png]]
400	400
401	401	MQTT Channel settings
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424	424	MQTT Publish
425	425
426	426
427		-
428	428	=== 4.4.2  Configure the MQTT Client for Downstream ===
429	429
430	430
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462	462	In above section, we have configured the UI to support MQTT upstream and downstream. We can simulate via Linux command. In this section, we will guide how to communicate with remote LoRa End Node for upstream and downstream.
463	463
464	464
	454	+
465	465	=== 4.5.1  Use LoRa Raw protocol for communication ~-~- For LG01/LG02 ===
466	466
467	467
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492	492	LoRa Parameter should match
493	493
494	494
495		-
496	496	Below is the test result after the Arduino Sketch is running.
497	497
498	498	[[image:image-20220527140459-19.png]]
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500	500	Upstream Data Flow
501	501
502	502
503		-
504	504	[[image:image-20220527140542-20.png]]
505	505
506	506	Downstream Data Flow
507	507
508	508
509		-
510	510	=== 4.5.2  Use LoRaWAN Protocol for communication ~-~- For LG308/LPS8/DLOS8 ===
511	511
512	512
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543	543	[[image:image-20220613191345-4.png]]
544	544
545	545
546		-
547	547	(% style="color:blue" %)**Step 4**(%%): Map the Device Address to Remote ID in MQTT server.
548	548
549	549	[[image:image-20220613190635-2.png]]
550	550
551	551
552		-
553	553	(% style="color:blue" %)**Step 5: Upstream**(%%): Save the change, we can see the log info via "sytem log", End Node and MQTT Server
554	554
555	555	[[image:image-20220527141843-24.png]]
556	556
557	557
558		-
559		-
560	560	[[image:image-20220527141933-25.png]]
561	561
562	562	Choose ASCII Format
563	563
564	564
565		-
566	566	[[image:image-20220527142028-26.png]]
567	567
568	568	LHT65 Decoder
569	569
570	570
571		-
572	572	(% style="color:blue" %)**Step 6: Set up subscribe**(%%)**:** Subscribe a topci for downstream.
573	573
574	574	[[image:image-20220613191426-5.png]]
575	575
576	576
577		-
578	578	(% style="color:blue" %)**Step 7: Downstream**(%%): Save the change, we can see the log info via "sytem log", End Node and MQTT Server.
579	579
580	580	[[image:image-20220527142239-28.png]]
581	581
582	582
583		-
584	584	=== 4.5.3 MQTT Downstream format ===
585	585
586	586
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609	609	Check out this link for more mosquito-related directives [[https:~~/~~/mosquitto.org/man/mosquitto_pub-1.html>>https://mosquitto.org/man/mosquitto_pub-1.html]]
610	610
611	611
612		-
613	613	= 5.  How to Debug =
614	614
615	615