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Last modified by Xiaoling on 2022/09/02 18:11
From version 8.1
edited by Xiaoling
on 2022/05/31 13:59
Change comment: Uploaded new attachment "image-20220531135954-7.png", version {1}
To version 50.2
edited by Xiaoling
on 2022/09/02 18:10
Change comment: There is no comment for this version

Summary

Details

Page properties
Content
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1 +**Table of Contents: **
2 +
1 1  {{toc/}}
2 2  
3 3  
... ... @@ -5,11 +5,14 @@
5 5  
6 6  = 1. What is MQTT API? =
7 7  
8 -{{{MQTT is a publish/subscribe model that runs over TCP/IP sockets or WebSockets. MQTT over WebSockets can be secured with SSL.}}}
9 9  
11 +MQTT is a publish/subscribe model that runs over TCP/IP sockets or WebSockets. MQTT over WebSockets can be secured with SSL.
10 10  
13 +
14 +
11 11  = 2. MQTT Features =
12 12  
17 +
13 13  The MQTT protocol runs on TCP / IP or other network protocols and provides an ordered, lossless, bidirectional connection. Features include:
14 14  
15 15  * The publish / subscribe messaging pattern used, which provides one-to-many messaging for decoupling from the application.
... ... @@ -21,10 +21,18 @@
21 21  * Notification mechanism, notify the transmission of both sides when an exception occurs
22 22  
23 23  
29 +
30 +
31 +
24 24  = 3. What does this example shows? How it works? =
25 25  
34 +
35 +(((
26 26  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.
27 27  
38 +
39 +)))
40 +
28 28  [[image:image-20220531135402-1.png]]
29 29  
30 30  Message Queuing Telemetry Transport
... ... @@ -35,26 +35,41 @@
35 35  working principle
36 36  
37 37  
51 +
38 38  [[image:image-20220531135521-3.png]]
39 39  
54 +(((
40 40  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.
56 +)))
41 41  
42 42  
43 43  
44 44  [[image:image-20220531135607-4.png]]
45 45  
62 +
63 +(((
46 46  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.
65 +)))
47 47  
67 +(((
48 48  MQTT agreement to achieve the need: client and server There are three identities in the MQTT protocol: Publish, Broker (server), Subscribe. Among them, the publisher and the subscriber of the message are all clients, the broker is the server, and the publisher can be both the subscriber and the subscriber. MQTT transmission of information is divided into: Topic and payload in two parts Topic, can be understood as the type of message subscribers Subscribe, you will receive the theme of the message content (payload) The payload, which can be understood as the content of the message, refers to the specific content to be used by the subscribers.
69 +)))
49 49  
71 +(((
50 50  To use the server, we need to register an account on [[ThingSpeak>>url:https://thingspeak.com/]] . Then create a channel and type the channel info. As shown below, the Channel ID is the unique ID to store our data in [[ThingSpeak>>url:https://thingspeak.com/]] .
73 +)))
51 51  
52 52  
76 +
53 53  = 4. Preparation =
54 54  
79 +
55 55  == 4.1 Hardware ==
56 56  
82 +
57 57  1. [[image:image-20220531135650-5.png]](((
84 +
85 +
58 58  Listening on the LoRa wireless channel, while there is new LoRa packet arrives, parse it and send out to IoT Server.
59 59  
60 60  
... ... @@ -61,12 +61,17 @@
61 61  
62 62  )))
63 63  1. [[image:image-20220531135750-6.png]](((
92 +
93 +
64 64  The LoRa End node keeps getting temperature and humidity from the sensor and sends out via LoRa periodically.
65 -)))
66 66  
67 67  
97 +
98 +)))
99 +
68 68  == 4.2 Software ==
69 69  
102 +
70 70  1. [[4.3.4 version>>url:http://www.dragino.com/downloads/index.php?dir=motherboards/ms14/Firmware/IoT/]]
71 71  1. [[MQTT_Client>>url:https://github.com/dragino/Arduino-Profile-Examples/tree/master/libraries/Dragino/examples/IoTServer/ThingSpeak/MQTT_Client]]
72 72  1. [[MQTT_Simple_Server MQTT_Simeple_Server>>url:https://github.com/dragino/Arduino-Profile-Examples/tree/master/libraries/Dragino/examples/LoRa/MQTT_Simple_Server]]
... ... @@ -74,105 +74,191 @@
74 74  
75 75  
76 76  
110 +
111 +
77 77  == 4.3 Server(For example) ==
78 78  
114 +
79 79  * [[ThingSpeak>>url:https://thingspeak.com/]]
80 80  
81 81  
118 +
119 +
120 +
82 82  == 4.4 Configure IoT Server ==
83 83  
123 +
84 84  * Need this keys:
85 85  
86 -1. [[~[~[image:https://wiki.dragino.com/images/thumb/b/bc/Server1.png/400px-Server1.png~|~|height="185" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:Server1.png]](((
126 +1. [[image:image-20220531140054-8.png]](((
87 87  Channel ID,Write API Key
128 +
129 +
130 +
88 88  )))
89 -1. [[~[~[image:https://wiki.dragino.com/images/thumb/e/e2/Server2.png/400px-Server2.png~|~|height="128" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:Server2.png]](((
132 +1. [[image:image-20220531140326-13.png]](((
133 +
134 +
90 90  Account->My Profile,MQTT API Key
136 +
137 +
138 +
91 91  )))
92 92  1. (((
93 -[[~[~[image:https://wiki.dragino.com/images/thumb/f/f3/IOT_Configure1.png/400px-IOT_Configure1.png~|~|alt="IOT Configure1.png" height="132" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:IOT_Configure1.png]]
94 -)))
141 +[[image:image-20220531140304-12.png]]
95 95  
96 96  
144 +
145 +)))
146 +
97 97  == 4.5 Configure LG01 settings ==
98 98  
99 -Tips:Please confirm that your LG01 version is 4.3.3.
100 100  
101 -[[~[~[image:https://wiki.dragino.com/images/thumb/e/eb/LG01_Version.png/400px-LG01_Version.png~|~|height="219" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:LG01_Version.png]]
150 +Tips:  Please confirm that your LG01 version is 4.3.3.
102 102  
103 -Overview
104 104  
105 -[[~[~[image:https://wiki.dragino.com/images/thumb/f/f6/MQTT_LG01_Configure_1.png/400px-MQTT_LG01_Configure_1.png~|~|height="281" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_LG01_Configure_1.png]]
153 +[[image:image-20220531140248-11.png]]
106 106  
107 -Senosor->IOT Server
155 +**Overview**
108 108  
109 -[[~[~[image:https://wiki.dragino.com/images/thumb/6/64/MQTT_LG01_Configure_2.png/400px-MQTT_LG01_Configure_2.png~|~|height="152" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_LG01_Configure_2.png]]
110 110  
111 -MQTT->Configure MQTT Server
112 112  
113 -[[~[~[image:https://wiki.dragino.com/images/thumb/6/6a/MQTT_LG01_Configure_3.png/400px-MQTT_LG01_Configure_3.png~|~|height="91" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_LG01_Configure_3.png]]
159 +[[image:image-20220531140425-14.png]]
114 114  
115 -MQTT->MQTT Channel
161 +**Senosor->IOT Server**
116 116  
117 -[[~[~[image:https://wiki.dragino.com/images/thumb/3/36/MQTT_LG01_Configure_4.png/400px-MQTT_LG01_Configure_4.png~|~|height="257" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_LG01_Configure_4.png]]
118 118  
119 -Sensor->LoRa/LoraWAN
120 120  
121 -[[~[~[image:https://wiki.dragino.com/images/thumb/6/61/MQTT_LG01_Configure_5.png/400px-MQTT_LG01_Configure_5.png~|~|height="230" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_LG01_Configure_5.png]]
165 +[[image:image-20220531140458-15.png]]
122 122  
123 -Configure network access.Network->Internet Access
167 +**MQTT->Configure MQTT Server**
124 124  
125 125  
170 +
171 +[[image:image-20220531140538-16.png]]
172 +
173 +**MQTT->MQTT Channel**
174 +
175 +
176 +
177 +[[image:image-20220531140611-17.png]]
178 +
179 +**Sensor->LoRa/LoraWAN**
180 +
181 +
182 +
183 +[[image:image-20220531140651-18.png]]
184 +
185 +
186 +Configure network access.**Network->Internet Access**
187 +
188 +
189 +
126 126  == 4.6 Try MQTT API call with LG01 Linux command ==
127 127  
192 +
128 128  === 4.6.1 Input the command at the console ===
129 129  
130 -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]](((
195 +
196 +1. [[image:image-20220531140811-19.png]](((
197 +
198 +
131 131  Open this Application.
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201 +
202 +
132 132  )))
133 -1. [[~[~[image:https://wiki.dragino.com/images/thumb/d/d7/3_2.png/400px-3_2.png~|~|height="230" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:3_2.png]](((
204 +1. [[image:image-20220531140842-20.png]](((
205 +
206 +
134 134  Input passward(dragino).After into the console.
208 +
209 +
210 +
135 135  )))
136 -1. [[~[~[image:https://wiki.dragino.com/images/thumb/5/5d/3_5.png/400px-3_5.png~|~|height="310" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:3_5.png]](((
212 +1. [[image:image-20220531140915-21.png]](((
213 +
214 +
137 137  First, we need to make sure the LG01 has internet access. We can log in the SSH and ping an Internet address and see if it get through. As below
216 +
217 +
218 +
138 138  )))
139 -1. [[~[~[image:https://wiki.dragino.com/images/thumb/6/63/3_3.png/400px-3_3.png~|~|height="213" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:3_3.png]](((
220 +1. [[image:image-20220531140955-22.png]](((
221 +
222 +
140 140  LG01 has built-in Linux tool mosquitto. It is a very powerful tool for http communication. We can use this tool to handle MQTT API call in LG01. Input this command and replace your keys.
224 +
225 +
226 +
141 141  )))
142 -1. [[~[~[image:https://wiki.dragino.com/images/thumb/3/35/3_4.png/500px-3_4.png~|~|height="180" width="500"~]~]>>url:https://wiki.dragino.com/index.php/File:3_4.png]](((
228 +1. [[image:image-20220531141026-23.png]](((
229 +
230 +
143 143  Go to Server check out result.We success to use LG01 to uplink data to ThingSpeak,the mosquitto_pub command is executed in the Linux side, finally, we will have to call mosquitto_pub command with sensor data variable in Arduino side. This is through the process class in Arduino and we will show it in the final sketch.
232 +
233 +
144 144  )))
145 145  
146 146  * This command:
147 147  
148 -{{{mosquitto_pub -h mqtt.thingspeak.com -p 1883 -u dragino -P UZ4NGHKJMKS9WR5E -i dragino_Client -t channels/399171/publish/A4NNF6G8G63JOIUV -m "field1=23.5&field2=57.5&status=MQTTPUBLISH"
149 -}}}
238 +(% class="box infomessage" %)
239 +(((
240 +**mosquitto_pub -h mqtt.thingspeak.com -p 1883 -u dragino -P UZ4NGHKJMKS9WR5E  -i dragino_Client -t channels/399171/publish/A4NNF6G8G63JOIUV -m "field1=23.5&field2=57.5&status=MQTTPUBLISH"**
241 +)))
150 150  
151 151  * Need replace:
152 152  
153 -{{{UZ4NGHKJMKS9WR5E //MQTT API
154 -399171 //Channel ID
155 -A4NNF6G8G63JOIUV //Write API Key
156 -}}}
245 +(% class="box infomessage" %)
246 +(((
247 +**UZ4NGHKJMKS9WR5E  ~/~/MQTT API
248 +399171            ~/~/Channel ID
249 +A4NNF6G8G63JOIUV  ~/~/Write API Key**
250 +)))
157 157  
158 158  
253 +
159 159  === 4.6.2 Input the command at the console(LG01 new version:4.3.4) ===
160 160  
161 -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]](((
256 +
257 +1. [[image:image-20220531141150-24.png]](((
258 +
259 +
162 162  Open this Application.
261 +
262 +
263 +
163 163  )))
164 -1. [[~[~[image:https://wiki.dragino.com/images/thumb/6/6e/MQTT_Command_2.png/400px-MQTT_Command_2.png~|~|height="76" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_2.png]](((
265 +1. (((
266 +[[image:image-20220531141400-27.png]]
267 +
268 +
165 165  Check the settings.
270 +
271 +
272 +
166 166  )))
167 -1. [[~[~[image:https://wiki.dragino.com/images/thumb/8/8d/MQTT_Command_1.png/400px-MQTT_Command_1.png~|~|height="343" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_1.png]](((
274 +1. (((
275 +[[image:image-20220531141601-30.png]]
276 +
277 +
168 168  input this command.
279 +
280 +
281 +
169 169  )))
170 -1. [[~[~[image:https://wiki.dragino.com/images/thumb/d/de/MQTT_Command_3.png/400px-MQTT_Command_3.png~|~|height="207" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_3.png]](((
283 +1. [[image:image-20220531141515-29.png]](((
284 +
285 +
171 171  Check the result.
287 +
288 +
289 +
172 172  )))
173 173  
174 174  == 4.7 Updata data to Server(Through MQTT) ==
175 175  
294 +
176 176  * This version of Sketch implements these features:
177 177  
178 178  1. Read the LG01 configuration information from Linux.
... ... @@ -181,46 +181,86 @@
181 181  1. Sketch will write active content to /tmp/iot/status periodically (every 5 minutes).(Watchdog feature)
182 182  
183 183  
184 -1. [[~[~[image:https://wiki.dragino.com/images/thumb/8/82/MQTT_Sketch_2.png/400px-MQTT_Sketch_2.png~|~|height="233" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Sketch_2.png]](((
303 +
304 +1. [[image:image-20220531143822-49.png]](((
305 +
306 +
185 185  Open the sketch [[MQTT_Simple_Server>>url:https://github.com/dragino/Arduino-Profile-Examples/tree/master/libraries/Dragino/examples/LoRa/MQTT_Simple_Server]].(Board:Dragino Yun + UNO or LG01/OLG01,Port:Network ports.)and upload.
308 +
309 +
310 +
186 186  )))
187 -1. [[~[~[image:https://wiki.dragino.com/images/thumb/7/73/MQTT_Sketch2.png/400px-MQTT_Sketch2.png~|~|height="540" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Sketch2.png]](((
312 +1. [[image:image-20220531141800-32.png]](((
313 +
314 +
188 188  Open Serial monitor.
316 +
317 +
318 +
189 189  )))
190 -1. [[~[~[image:https://wiki.dragino.com/images/thumb/9/98/MQTT_Sketch_1.png/400px-MQTT_Sketch_1.png~|~|height="261" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Sketch_1.png]](((
320 +1. [[image:image-20220531143748-48.png]](((
321 +
322 +
191 191  Open the Sketch [[MQTT_Client>>url:https://github.com/dragino/Arduino-Profile-Examples/tree/master/libraries/Dragino/examples/IoTServer/ThingSpeak/MQTT_Client]]. (Board:Arduino/Genuino Uno.Port:Serial ports.)and upload.
324 +
325 +
326 +
192 192  )))
193 -1. [[~[~[image:https://wiki.dragino.com/images/thumb/3/3d/MQTT_Sketch3.png/400px-MQTT_Sketch3.png~|~|height="371" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Sketch3.png]](((
328 +1. [[image:image-20220531141927-34.png]](((
329 +
330 +
194 194  Open Serial monitor.
332 +
333 +
334 +
195 195  )))
196 196  1. Go to IoT Server to check the result.
197 197  1. (((
198 -[[~[~[image:https://wiki.dragino.com/images/thumb/4/43/MQTT_result_1.png/400px-MQTT_result_1.png~|~|alt="MQTT result 1.png" height="181" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_result_1.png]]
338 +[[image:image-20220531143707-47.png]]
339 +
340 +
341 +
199 199  )))
200 200  1. (((
201 -[[~[~[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]]
344 +[[image:image-20220531143632-46.png]]
345 +
346 +
347 +
202 202  )))
203 203  
204 204  = 5. FAQ =
205 205  
352 +
206 206  == 5.1 Configure to support general mqtt server ==
207 207  
355 +
208 208  First, try to run **mosquitto_pub** in Linux console to send a data to MQTT server.
209 209  
210 210  For example: for ThingSpeak, a MQTT publish command is:
211 211  
212 -{{{mosquitto_pub -h mqtt.thingspeak.com -p 1883 -u dragino -P QZXTAKE88V3S7O2J -i dragino_Client -t channels/200893/publish/B9Z0R25QNVEBKIFY -m "field1=34&field2=89&status=MQTTPUBLISH"
213 -}}}
360 +(% class="box infomessage" %)
361 +(((
362 +**mosquitto_pub -h mqtt.thingspeak.com -p 1883 -u dragino -P QZXTAKE88V3S7O2J  -i dragino_Client -t channels/200893/publish/B9Z0R25QNVEBKIFY -m "field1=34&field2=89&status=MQTTPUBLISH"**
363 +)))
214 214  
215 215  What now we need to put in the LG01 is how to combine this command.
216 216  
217 217  1. LG01 web console -> Sensor -> MQTT
218 218  1. Choose general Server
219 -1. [[~[~[image:https://wiki.dragino.com/images/thumb/e/ea/MQTT_Configure1.png/600px-MQTT_Configure1.png~|~|height="367" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Configure1.png]](((
369 +1. [[image:image-20220531142342-37.png]](((
370 +
371 +
220 220  Refer to your server to fill in.
373 +
374 +
375 +
221 221  )))
222 -1. [[~[~[image:https://wiki.dragino.com/images/0/07/MQTT_Configure2.png~|~|height="93" width="538"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Configure2.png]](((
377 +1. [[image:image-20220531142447-38.png]](((
378 +
379 +
223 223  Ex:ThingSpeak Server
381 +
382 +
224 224  )))
225 225  
226 226  According to MQTT commands: mosquitto_pub, we need to put
... ... @@ -239,29 +239,54 @@
239 239  
240 240  User can also enable MQTT debug in the LG01 ~-~-> IoT Server settings and run logread in Linux console to see how the mqtt command is compose. below is an example:
241 241  
242 -[[~[~[image:https://wiki.dragino.com/images/thumb/8/81/MQTT_Configure3.png/600px-MQTT_Configure3.png~|~|height="114" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Configure3.png]]
401 +[[image:image-20220531142525-39.png]]
243 243  
403 +
244 244  MQTT Logread example
245 245  
246 246  
407 +
247 247  == 5.2 What is Watchdog feature? ==
248 248  
410 +
249 249  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.
250 250  
251 -* [[~[~[image:https://wiki.dragino.com/images/thumb/f/f2/Wathcdog.png/400px-Wathcdog.png~|~|height="184" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:Wathcdog.png]](((
413 +
414 +* [[image:image-20220531142558-40.png]](((
252 252  Enable Sensor->Micro-Controller settings
416 +
417 +
418 +
253 253  )))
254 -* [[~[~[image:https://wiki.dragino.com/images/thumb/8/82/MQTT_Sketch_2.png/400px-MQTT_Sketch_2.png~|~|height="233" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Sketch_2.png]](((
420 +* [[image:image-20220531142629-41.png]](((
421 +
422 +
255 255  Open the sketch [[MQTT_Simple_Server>>url:https://github.com/dragino/Arduino-Profile-Examples/tree/master/libraries/Dragino/examples/LoRa/MQTT_Simple_Server]].(Board:Dragino Yun + UNO or LG01/OLG01,Port:Network ports.)and upload.
424 +
425 +
426 +
256 256  )))
257 -* [[~[~[image:https://wiki.dragino.com/images/2/21/Loop.png~|~|height="181" width="388"~]~]>>url:https://wiki.dragino.com/index.php/File:Loop.png]](((
428 +* [[image:image-20220531142659-42.png]](((
429 +
430 +
258 258  Each time the function loops, it uses the watchdog function once.
432 +
433 +
434 +
259 259  )))
260 -* [[~[~[image:https://wiki.dragino.com/images/thumb/3/35/Dog.png/400px-Dog.png~|~|height="161" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:Dog.png]](((
436 +* [[image:image-20220531142720-43.png]](((
437 +
438 +
261 261  Open SSH and check watchdog result.If the result change constantly,the feature enable successfully.
440 +
441 +
442 +
262 262  )))
263 -* [[~[~[image:https://wiki.dragino.com/images/thumb/a/ac/Checkdog.png/400px-Checkdog.png~|~|height="222" width="400"~]~]>>url:https://wiki.dragino.com/index.php/File:Checkdog.png]](((
444 +* [[image:image-20220531142748-44.png]](((
445 +
446 +
264 264  If the time doesnt's change,you can refer it to calculate for checking status.
265 265  )))
266 266  
267 -== ==
450 +(% class="wikigeneratedid" id="H" %)
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