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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)
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25	25	= 2.  Firmware Change Log for MQTT feature =
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32	32	* LG02_LG08-5.3.1580178039
33	33	** Initiate version
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35	35	= 3.  MQTT forward operating principle =
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41	41	Below shows the network structure for MQTT forwarding.
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43	43	* **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.
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,
	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.
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46	46	[[image:image-20220527133547-1.png]]
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48	48	General MQTT structure
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51	51	== 3.2  How sensor data is forwarded ==
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56	56
57	57	=== 3.2.1  Upstream ===
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59	59	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.
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61	61	(((
62	62	The data flow works as below diagram.
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63	63	)))
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65	65	[[image:image-20220527134000-2.png]]
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92	92	Downstream path
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95	95	== 3.3  Macro Definition ==
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100	100	(((
101	101	Currently the (% style="color:#4f81bd" %)**-t (topic)**(%%) and (% style="color:#4f81bd" %)**-m (message)**(%%) support Macros.
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104	104	)))
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113	113	* HOSTNAME: Device Hostname
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116	116	=== 3.3.2  -m message macro ===
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123	123	* JSON: Convert META to json format.
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126	126	=== 3.3.3  Example for Macro ===
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317	317
318	318	== 4.3  Simulate via Dragino Command Line ==
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320	320	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.
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322	322	In the Dragino Gateway, we use [[mosquitto client>>url:https://mosquitto.org/]] for MQTT connection.
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345	345	mosquitto_sub
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348	348	== 4.4  Configure Dragino UI for MQTT connection ==
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350	350	This chapter are step by step to show to configure the Dragino Menu for MQTT auto connection.
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352	352	(((
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511	511	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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514		-(% style="color:#4f81bd" %)**Video Instruction**(%%): (% style="color:blue" %)[[https:~~/~~/youtu.be/qJTY441-t90>>url:https://youtu.be/qJTY441-t90]]
	530	+(% style="color:blue" %)**Video Instruction**(%%): (% style="color:blue" %)[[https:~~/~~/youtu.be/qJTY441-t90>>url:https://youtu.be/qJTY441-t90]]
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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.
	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.
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