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	287	+= 4. Example to communicate to a simple MQTT server =
287	287
288		-= 4.  Example to communicate to a simple MQTT server =
	289	+== 4.1 Overview ==
289	289
290		-
291		-== 4.1  Overview ==
292		-
293		-
294	294	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/]].
295	295
296	296
297		-== 4.2  Simulate via MQTT.fx utility ==
	294	+== 4.2 Simulate via MQTT.fx utility ==
298	298
299		-
300	300	The [[MQTT.fx>>url:http://mqttfx.jensd.de/index.php/download]] is a MQTT client tool. We can use this to simulate a MQTT connection to our MQTT broker first to make sure the MQTT broker works. This will also help us understand how it works.
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302	302	(((
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322	322	Downstream: Subscribe a topic to get downstream
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324	324
	321	+== 4.3 Simulate via Dragino Command Line ==
325	325
326		-== 4.3  Simulate via Dragino Command Line ==
327		-
328	328	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.
329	329
330	330	In the Dragino Gateway, we use [[mosquitto client>>url:https://mosquitto.org/]] for MQTT connection.
331	331
332	332
333		-(% style="color:blue" %)**For Upstream**
	328	+(% style="color:#4f81bd" %)**For Upstream**
334	334
335	335	command is [[mosquitto_pub>>url:https://mosquitto.org/man/mosquitto_pub-1.html]]
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343	343	mosquitto_pub
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	341	+(% style="color:#4f81bd" %)**For Downstream**
346	346
347		-(% style="color:blue" %)**For Downstream**
348		-
349	349	Use [[mosquitto_sub>>url:https://mosquitto.org/man/mosquitto_sub-1.html]] to subscribe the change on the topic.
350	350
351	351	[[image:image-20220527135440-10.png]]

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