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20	20	* LIG16
21	21	* MS14 series if installed with the same firmware. (in this case, the MQTT forward will work , but no LoRa support)
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	23	+
	24	+
23	23	= 2. Firmware Change Log for MQTT feature =
24	24
25	25	(((
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29	29	* LG02_LG08-5.3.1580178039
30	30	** Initiate version
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32	32	= 3. MQTT forward operating principle =
33	33
34	34	== 3.1 Network Structure ==
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101	101	* USERNAME: User ID (-u)
102	102	* HOSTNAME: Device Hostname
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	109	+
104	104	=== 3.3.2 -m message macro ===
105	105
106	106	* HOSTNAME: Device Hostname
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109	109	* META: Completely sensor data with time stamp and rssi
110	110	* JSON: Convert META to json format.
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112	112	=== 3.3.3 Example for Macro ===
113	113
114	114	[[image:image-20220527134251-4.png]]
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115	115
116	116	MQTT Publish configure
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	126	+
118	118	Above screen shots shows below format:
119	119
120	120	* -t: CLIENTID/CHANNEL/data
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126	126
127	127	Sensor Data
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129	129	(((
130	130	According to above macro. Gateway will publish (% style="color:#4f81bd" %)**field1=22.0&field2=49.0**(%%) to topic: (% style="color:#4f81bd" %)**dragino-1b7060/78901/data**(%%), where 78901 is the remote channel for this node ID.
131	131	)))
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332	332
333	333	go to mqtt configure menu
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335	335	(((
336	336	Select (% style="color:#4f81bd" %)**Forward to MQTT server**. (% style="color:red" %)**Notice**(%%): This option is removed from the latest firmware, in the latest firmware, if user submit "SAVE & APPLY" in MQTT page, the gateway will use MQTT service.
337	337	)))
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449	449	LoRa Parameter should match
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452	452	Below is the test result after the Arduino Sketch is running.
453	453
454	454	[[image:image-20220527140459-19.png]]
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456	456	Upstream Data Flow
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459	459	[[image:image-20220527140542-20.png]]
460	460
461	461	Downstream Data Flow
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510	510	Upstream Process
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513	513	[[image:image-20220527141933-25.png]]
514	514
515	515	Choose ASCII Format
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518	518	[[image:image-20220527142028-26.png]]
519	519
520	520	LHT65 Decoder
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523	523	(% style="color:#4f81bd" %)**Step 6: Set up subscribe**(%%)**:** Subscribe a topci for downstream.
524	524
525	525	[[image:image-20220527142115-27.png]]
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527	527	Subscribe to a topic
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530	530	(% style="color:#4f81bd" %)**Step 7: Downstream**(%%): Save the change, we can see the log info via "sytem log", End Node and MQTT Server.
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532	532	[[image:image-20220527142239-28.png]]