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1		-
	1	+{{toc/}}
2	2
3		-= 1. What is MQTT API? =
4	4
5		-{{{MQTT is a publish/subscribe model that runs over TCP/IP sockets or WebSockets. MQTT over WebSockets can be secured with SSL.
6	6
7		-}}}
8	8
	6	+= 1. What is MQTT API? =
9	9
	8	+{{{MQTT is a publish/subscribe model that runs over TCP/IP sockets or WebSockets. MQTT over WebSockets can be secured with SSL.}}}
	9	+
	10	+
10	10	= 2. MQTT Features =
11	11
12	12	The MQTT protocol runs on TCP / IP or other network protocols and provides an ordered, lossless, bidirectional connection. Features include:
...	...	@@ -24,18 +24,22 @@
24	24
25	25	The server we use here is ThingSpeak which has an intuitive chart to show the test result for our test.The ThingSpeak IoT service now supports MQTT subscriptions to receive instant updates when [[ThingSpeak>>url:https://thingspeak.com/]] channel gets updated. The method here is general and can be used with other IoT servers for MQTT connection as well.
26	26
27		-[[~[~[image:https://wiki.dragino.com/images/3/3d/MQTT_1.png~|~|height="68" width="260"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_1.png]]
	28	+[[image:image-20220531135402-1.png]]
28	28
29	29	Message Queuing Telemetry Transport
30	30
31		-[[~[~[image:https://wiki.dragino.com/images/thumb/c/cb/YuanliMQTT.png/400px-YuanliMQTT.png~|~|height="139" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:YuanliMQTT.png]]
32	32
	33	+[[image:image-20220531135449-2.png]]
	34	+
33	33	working principle
34	34
35		-[[~[~[image:https://wiki.dragino.com/images/thumb/f/f9/MQTT_2.png/400px-MQTT_2.png~|~|height="160" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_2.png]]
36	36
	38	+[[image:image-20220531135521-3.png]]
	39	+
37	37	Schematic diagram: uplink.In this section, we will try to program LG01 to uplink data to ThingSpeak. The data flow in this example.We have already tried ① and ② in the above simple LoRa example. Now we will try the step ③ first, after it work as expect, we will integrate these three steps together for a complete uplink example.
38	38
	42	+
	43	+
39	39	[[~[~[image:https://wiki.dragino.com/images/thumb/d/de/MQTT_3.png/400px-MQTT_3.png~|~|height="160" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_3.png]]
40	40
41	41	Schematic diagram:downlink.In this section, we will try to program LG01 to fetch download data from ThingSpeak, then broadcast this data to local LoRa network. The end node will get this message and check if they need to do something. Similar with Uplink Example, we will first try to do it in PC, then do it in Linux side, and finally integrate it with LoRa.
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71	71	* [[ThingSpeak>>url:https://thingspeak.com/]]
72	72
73	73
74		-== Configure IoT Server ==
	79	+== 4.4 Configure IoT Server ==
75	75
76	76	* Need this keys:
77	77
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86	86	)))
87	87
88	88
89		-== Configure LG01 settings ==
	94	+== 4.5 Configure LG01 settings ==
90	90
91	91	Tips:Please confirm that your LG01 version is 4.3.3.
92	92
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115	115	Configure network access.Network->Internet Access
116	116
117	117
118		-== Try MQTT API call with LG01 Linux command ==
	123	+== 4.6 Try MQTT API call with LG01 Linux command ==
119	119
120		-=== Input the command at the console ===
	125	+=== 4.6.1 Input the command at the console ===
121	121
122	122	1. [[~[~[image:https://wiki.dragino.com/images/8/84/3_1.png~|~|height="99" width="93"~]~]>>url:https://wiki.dragino.com/index.php/File:3_1.png]](((
123	123	Open this Application.
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148	148	}}}
149	149
150	150
151		-=== Input the command at the console(LG01 new version:4.3.4) ===
	156	+=== 4.6.2 Input the command at the console(LG01 new version:4.3.4) ===
152	152
153	153	1. [[~[~[image:https://wiki.dragino.com/images/8/84/3_1.png~|~|height="99" width="93"~]~]>>url:https://wiki.dragino.com/index.php/File:3_1.png]](((
154	154	Open this Application.
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163	163	Check the result.
164	164	)))
165	165
166		-== Updata data to Server(Through MQTT) ==
	171	+== 4.7 Updata data to Server(Through MQTT) ==
167	167
168	168	* This version of Sketch implements these features:
169	169
...	...	@@ -193,9 +193,9 @@
193	193	[[~[~[image:https://wiki.dragino.com/images/thumb/7/70/MQTT_result_2.png/400px-MQTT_result_2.png~|~|alt="MQTT result 2.png" height="190" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_result_2.png]]
194	194	)))
195	195
196		-= FAQ =
	201	+= 5. FAQ =
197	197
198		-== Configure to support general mqtt server ==
	203	+== 5.1 Configure to support general mqtt server ==
199	199
200	200	First, try to run **mosquitto_pub** in Linux console to send a data to MQTT server.
201	201
...	...	@@ -236,7 +236,7 @@
236	236	MQTT Logread example
237	237
238	238
239		-== What is Watchdog feature? ==
	244	+== 5.2 What is Watchdog feature? ==
240	240
241	241	LG01 for 4.3.3 version,we have added watchdog feature. In order to avoid the gateway running process will get stuck. So add writing action on every times.
242	242

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