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16	16	This MQTT forward instruction is for below devices:
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18	18	* Firmware Version > LG02_LG08-5.3.1580178039 [[Firmware Download>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]]
19		-* 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	+* 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]])
20	20	* LG02, OLG02
21	21	* LG308, DLOS8
22	22	* LPS8
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	28	+
28	28	= 2.  Firmware Change Log for MQTT feature =
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40	40	= 3.  MQTT forward operating principle =
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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.
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52	52	[[image:image-20220527133547-1.png]]
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54	54	General MQTT structure
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134	134	=== 3.3.2  -m message macro ===
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145	145	=== 3.3.3  Example for Macro ===
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505	505	* The LoRa parameter settings in Arduino should match the LoRa settings in gateway, as below:
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508	508	[[image:image-20220527140354-18.png]]
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510	510	LoRa Parameter should match