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9	9	Dragino LoRa/LoRaWAN gateway support MQTT forwarding. It can forward the sensor data from LoRa network to MQTT server , and vice verse.
10	10
11	11
12		-
13	13	== 1.1  Support Devices ==
14	14
15	15
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24	24	* MS14 series if installed with the same firmware. (in this case, the MQTT forward will work , but no LoRa support)
25	25
26	26
27		-
28	28	= 2.  Firmware Change Log for MQTT feature =
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30	30
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36	36	** Initiate version
37	37
38	38
39		-
40	40	= 3.  MQTT forward operating principle =
41	41
42		-
43	43	== 3.1  Network Structure ==
44	44
45	45
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48	48	* **For Uplink:**  The sensor sends data to LoRa Gateway via LoRa wireless, The gateway will process these data and forward to remote MQTT Broker via Internet.
49	49	* **For Downlink:** The gateway subscribe a topic in the MQTT broker, when there is update on the topic, the gateway will know and broadcast the data to Local LoRa network.
50	50
51		-
52	52	[[image:image-20220527133547-1.png]]
53	53
54	54	General MQTT structure
55	55
56	56
57		-
58	58	== 3.2  How sensor data is forwarded ==
59	59
60	60
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61	61	In this MQTT forward feature, the key point is how the gateway process the sensor data.
62	62
63	63
64		-
65	65	=== 3.2.1  Upstream ===
66	66
67	67
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69	69
70	70	(((
71	71	The data flow works as below diagram.
72		-
73		-
74	74	)))
75	75
76	76	[[image:image-20220527134000-2.png]]
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87	87
88	88	(((
89	89
90		-
91		-
92	92	)))
93	93
94	94	=== 3.2.2  Downstream ===
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98	98
99	99	(((
100	100	Below are the data flow for downstream.
101		-
102		-
103	103	)))
104	104
105	105	[[image:image-20220527134038-3.png]]
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107	107	Downstream path
108	108
109	109
110		-
111	111	== 3.3  Macro Definition ==
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113	113
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116	116	(((
117	117	Currently the (% style="color:#4f81bd" %)**-t (topic)**(%%) and (% style="color:#4f81bd" %)**-m (message)**(%%) support Macros.
118	118
119		-
120	120
121	121	)))
122	122
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130	130	* HOSTNAME: Device Hostname
131	131
132	132
133		-
134	134	=== 3.3.2  -m message macro ===
135	135
136	136
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141	141	* JSON: Convert META to json format.
142	142
143	143
144		-
145	145	=== 3.3.3  Example for Macro ===
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147	147
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167	167	)))
168	168
169	169
170		-
171	171	== 3.4  Modify the MQTT to support more options ==
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173	173
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295	295	)))
296	296
297	297
298		-
299	299	= 4.  Example to communicate to a simple MQTT server =
300	300
301		-
302	302	== 4.1  Overview ==
303	303
304	304
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305	305	This section is an example to show how to set up LG01-N to communicate with a MQTT server. The MQTT server is a simple utility set up in a local PC. Note: User can set up same server via [[this instruction>>url:http://www.steves-internet-guide.com/install-mosquitto-broker/]].
306	306
307	307
308		-
309	309	== 4.2  Simulate via MQTT.fx utility ==
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311	311
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334	334	Downstream: Subscribe a topic to get downstream
335	335
336	336
337		-
338	338	== 4.3  Simulate via Dragino Command Line ==
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340	340
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356	356	mosquitto_pub
357	357
358	358
359		-
360	360	(% style="color:blue" %)**For Downstream**
361	361
362	362	Use [[mosquitto_sub>>url:https://mosquitto.org/man/mosquitto_sub-1.html]] to subscribe the change on the topic.
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366	366	mosquitto_sub
367	367
368	368
369		-
370	370	== 4.4  Configure Dragino UI for MQTT connection ==
371	371
372	372
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390	390	forward to MQTT
391	391
392	392
393		-
394	394	=== 4.4.1  Configure the MQTT Client for Upstream ===
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396	396
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411	411	MQTT Publish configure
412	412
413	413
414		-
415	415	[[image:image-20220527135929-13.png]]
416	416
417	417	MQTT Channel settings
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440	440	MQTT Publish
441	441
442	442
443		-
444	444	=== 4.4.2  Configure the MQTT Client for Downstream ===
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446	446
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504	504	* Downstream: Listening broadcast message from gateway, and print it in console.
505	505	* The LoRa parameter settings in Arduino should match the LoRa settings in gateway, as below:
506	506
507		-
508	508	[[image:image-20220527140354-18.png]]
509	509
510	510	LoRa Parameter should match
511	511
512	512
513		-
514	514	Below is the test result after the Arduino Sketch is running.
515	515
516	516	[[image:image-20220527140459-19.png]]
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518	518	Upstream Data Flow
519	519
520	520
521		-
522	522	[[image:image-20220527140542-20.png]]
523	523
524	524	Downstream Data Flow
525	525
526	526
527		-
528	528	=== 4.5.2  Use LoRaWAN Protocol for communication ~-~- For LG308/LPS8/DLOS8 ===
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530	530
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561	561	[[image:image-20220613191345-4.png]]
562	562
563	563
564		-
565	565	(% style="color:blue" %)**Step 4**(%%): Map the Device Address to Remote ID in MQTT server.
566	566
567	567	[[image:image-20220613190635-2.png]]
568	568
569	569
570		-
571	571	(% style="color:blue" %)**Step 5: Upstream**(%%): Save the change, we can see the log info via "sytem log", End Node and MQTT Server
572	572
573	573	[[image:image-20220527141843-24.png]]
574	574
575	575
576		-
577		-
578	578	[[image:image-20220527141933-25.png]]
579	579
580	580	Choose ASCII Format
581	581
582	582
583		-
584	584	[[image:image-20220527142028-26.png]]
585	585
586	586	LHT65 Decoder
587	587
588	588
589		-
590	590	(% style="color:blue" %)**Step 6: Set up subscribe**(%%)**:** Subscribe a topci for downstream.
591	591
592	592	[[image:image-20220613191426-5.png]]
593	593
594	594
595		-
596	596	(% style="color:blue" %)**Step 7: Downstream**(%%): Save the change, we can see the log info via "sytem log", End Node and MQTT Server.
597	597
598	598	[[image:image-20220527142239-28.png]]
599	599
600	600
601		-
602	602	=== 4.5.3 MQTT Downstream format ===
603	603
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627	627	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]]
628	628
629	629
630		-
631	631	= 5.  How to Debug =
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634	634	User can login the gateway's console and run (% style="color:#4f81bd" %)**logread -f**(%%). It will shows the output when there is packet arrive.User can see if it is correct.
635	635
636	636
637		-
638	638	= 6.  How to ask for Support =
639	639
640	640