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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		-
26		-
27	27	= 2.  Firmware Change Log for MQTT feature =
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29	29
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34	34	* LG02_LG08-5.3.1580178039
35	35	** Initiate version
36	36
37		-
38		-
39	39	= 3.  MQTT forward operating principle =
40	40
41	41
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45	45	Below shows the network structure for MQTT forwarding.
46	46
47	47	* **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.
48		-* **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.
	44	+* **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,
49	49
50		-
51	51	[[image:image-20220527133547-1.png]]
52	52
53	53	General MQTT structure
54	54
55	55
56		-
57	57	== 3.2  How sensor data is forwarded ==
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59	59
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62	62
63	63	=== 3.2.1  Upstream ===
64	64
65		-
66	66	Assume there are two sensor nodes, their ID are Node1 ID: 6734 , Node2 ID: 7456. In the remote MQTT broker there are two topics: Topic1: /channel/765800, Topic2: /channel/367860. We can set up in the gateway to map Node1 to Topic1 and Node2 to Topic2. So when there is a sensor data from Node1, the gateway will forward the data to Topic1, when there is sensor data from Node2, the gateway will forward to Topic2.
67	67
68	68	(((
69	69	The data flow works as below diagram.
70		-
71		-
72	72	)))
73	73
74	74	[[image:image-20220527134000-2.png]]
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101	101	Downstream path
102	102
103	103
104		-
105	105	== 3.3  Macro Definition ==
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107	107
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110	110	(((
111	111	Currently the (% style="color:#4f81bd" %)**-t (topic)**(%%) and (% style="color:#4f81bd" %)**-m (message)**(%%) support Macros.
112	112
113		-
114	114
115	115	)))
116	116
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124	124	* HOSTNAME: Device Hostname
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126	126
127		-
128	128	=== 3.3.2  -m message macro ===
129	129
130	130
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135	135	* JSON: Convert META to json format.
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137	137
138		-
139	139	=== 3.3.3  Example for Macro ===
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330	330
331	331	== 4.3  Simulate via Dragino Command Line ==
332	332
333		-
334	334	For first try of MQTT connection, simulate via command line is recommend, there are many servers / connection type for MQTT. They are using different connection parameters. Simulating the connection via command line will help us rapidly connect to server and debug.
335	335
336	336	In the Dragino Gateway, we use [[mosquitto client>>url:https://mosquitto.org/]] for MQTT connection.
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359	359	mosquitto_sub
360	360
361	361
362		-
363	363	== 4.4  Configure Dragino UI for MQTT connection ==
364	364
365		-
366	366	This chapter are step by step to show to configure the Dragino Menu for MQTT auto connection.
367	367
368	368	(((
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527	527	When use test this feature, please use the version higher then : (% style="color:#4f81bd" %)**LG02_LG08~-~-build-v5.4.1593400722-20200629-1120**(%%), in this version, the upload format is changed and readable, which is easier for integration.
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529	529
530		-(% style="color:blue" %)**Video Instruction**(%%): (% style="color:blue" %)[[https:~~/~~/youtu.be/qJTY441-t90>>url:https://youtu.be/qJTY441-t90]]
	514	+(% style="color:#4f81bd" %)**Video Instruction**(%%): (% style="color:blue" %)[[https:~~/~~/youtu.be/qJTY441-t90>>url:https://youtu.be/qJTY441-t90]]
531	531	)))
532	532
533	533	(((
534		-(% style="color:blue" %)**Step 1**(%%): Refer [[Communicate with ABP End Node>>Communicate with ABP End Node without LoRaWAN Network Server --- LG308]] to know how to set up LG308 to work with LoRaWAN End node.
	518	+(% style="color:blued" %)**Step 1**(%%): Refer [[Communicate with ABP End Node>>Communicate with ABP End Node without LoRaWAN Network Server --- LG308]] to know how to set up LG308 to work with LoRaWAN End node.
535	535	)))
536	536
537	537	(((