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Last modified by Xiaoling on 2022/09/02 18:11
From version 8.2
edited by Xiaoling
on 2022/05/31 14:00
Change comment: There is no comment for this version
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
... ... @@ -1,3 +1,5 @@
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]]
... ... @@ -73,105 +73,192 @@
73 73  1. [[DHTlib>>url:https://github.com/goodcheney/Lora/blob/patch-1/Lora%20Shield/Examples/DHTlib.zip]]
74 74  
75 75  
109 +
110 +
111 +
76 76  == 4.3 Server(For example) ==
77 77  
114 +
78 78  * [[ThingSpeak>>url:https://thingspeak.com/]]
79 79  
80 80  
118 +
119 +
120 +
81 81  == 4.4 Configure IoT Server ==
82 82  
123 +
83 83  * Need this keys:
84 84  
85 -1. [[image:image-20220531135954-7.png]](((
126 +1. [[image:image-20220531140054-8.png]](((
86 86  Channel ID,Write API Key
128 +
129 +
130 +
87 87  )))
88 -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 +
89 89  Account->My Profile,MQTT API Key
136 +
137 +
138 +
90 90  )))
91 91  1. (((
92 -[[~[~[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]]
93 -)))
141 +[[image:image-20220531140304-12.png]]
94 94  
95 95  
144 +
145 +)))
146 +
96 96  == 4.5 Configure LG01 settings ==
97 97  
98 -Tips:Please confirm that your LG01 version is 4.3.3.
99 99  
100 -[[~[~[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.
101 101  
102 -Overview
103 103  
104 -[[~[~[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]]
105 105  
106 -Senosor->IOT Server
155 +**Overview**
107 107  
108 -[[~[~[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]]
109 109  
110 -MQTT->Configure MQTT Server
111 111  
112 -[[~[~[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]]
113 113  
114 -MQTT->MQTT Channel
161 +**Senosor->IOT Server**
115 115  
116 -[[~[~[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]]
117 117  
118 -Sensor->LoRa/LoraWAN
119 119  
120 -[[~[~[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]]
121 121  
122 -Configure network access.Network->Internet Access
167 +**MQTT->Configure MQTT Server**
123 123  
124 124  
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 +
125 125  == 4.6 Try MQTT API call with LG01 Linux command ==
126 126  
192 +
127 127  === 4.6.1 Input the command at the console ===
128 128  
129 -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 +
130 130  Open this Application.
200 +
201 +
202 +
131 131  )))
132 -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 +
133 133  Input passward(dragino).After into the console.
208 +
209 +
210 +
134 134  )))
135 -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 +
136 136  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 +
137 137  )))
138 -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 +
139 139  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 +
140 140  )))
141 -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 +
142 142  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 +
143 143  )))
144 144  
145 145  * This command:
146 146  
147 -{{{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"
148 -}}}
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 +)))
149 149  
150 150  * Need replace:
151 151  
152 -{{{UZ4NGHKJMKS9WR5E //MQTT API
153 -399171 //Channel ID
154 -A4NNF6G8G63JOIUV //Write API Key
155 -}}}
245 +(% class="box infomessage" %)
246 +(((
247 +**UZ4NGHKJMKS9WR5E  ~/~/MQTT API
248 +399171            ~/~/Channel ID
249 +A4NNF6G8G63JOIUV  ~/~/Write API Key**
250 +)))
156 156  
157 157  
253 +
158 158  === 4.6.2 Input the command at the console(LG01 new version:4.3.4) ===
159 159  
160 -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 +
161 161  Open this Application.
261 +
262 +
263 +
162 162  )))
163 -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 +
164 164  Check the settings.
270 +
271 +
272 +
165 165  )))
166 -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 +
167 167  input this command.
279 +
280 +
281 +
168 168  )))
169 -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 +
170 170  Check the result.
287 +
288 +
289 +
171 171  )))
172 172  
173 173  == 4.7 Updata data to Server(Through MQTT) ==
174 174  
294 +
175 175  * This version of Sketch implements these features:
176 176  
177 177  1. Read the LG01 configuration information from Linux.
... ... @@ -180,46 +180,86 @@
180 180  1. Sketch will write active content to /tmp/iot/status periodically (every 5 minutes).(Watchdog feature)
181 181  
182 182  
183 -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 +
184 184  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 +
185 185  )))
186 -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 +
187 187  Open Serial monitor.
316 +
317 +
318 +
188 188  )))
189 -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 +
190 190  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 +
191 191  )))
192 -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 +
193 193  Open Serial monitor.
332 +
333 +
334 +
194 194  )))
195 195  1. Go to IoT Server to check the result.
196 196  1. (((
197 -[[~[~[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 +
198 198  )))
199 199  1. (((
200 -[[~[~[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 +
201 201  )))
202 202  
203 203  = 5. FAQ =
204 204  
352 +
205 205  == 5.1 Configure to support general mqtt server ==
206 206  
355 +
207 207  First, try to run **mosquitto_pub** in Linux console to send a data to MQTT server.
208 208  
209 209  For example: for ThingSpeak, a MQTT publish command is:
210 210  
211 -{{{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"
212 -}}}
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 +)))
213 213  
214 214  What now we need to put in the LG01 is how to combine this command.
215 215  
216 216  1. LG01 web console -> Sensor -> MQTT
217 217  1. Choose general Server
218 -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 +
219 219  Refer to your server to fill in.
373 +
374 +
375 +
220 220  )))
221 -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 +
222 222  Ex:ThingSpeak Server
381 +
382 +
223 223  )))
224 224  
225 225  According to MQTT commands: mosquitto_pub, we need to put
... ... @@ -238,29 +238,54 @@
238 238  
239 239  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:
240 240  
241 -[[~[~[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]]
242 242  
403 +
243 243  MQTT Logread example
244 244  
245 245  
407 +
246 246  == 5.2 What is Watchdog feature? ==
247 247  
410 +
248 248  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.
249 249  
250 -* [[~[~[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]](((
251 251  Enable Sensor->Micro-Controller settings
416 +
417 +
418 +
252 252  )))
253 -* [[~[~[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 +
254 254  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 +
255 255  )))
256 -* [[~[~[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 +
257 257  Each time the function loops, it uses the watchdog function once.
432 +
433 +
434 +
258 258  )))
259 -* [[~[~[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 +
260 260  Open SSH and check watchdog result.If the result change constantly,the feature enable successfully.
440 +
441 +
442 +
261 261  )))
262 -* [[~[~[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 +
263 263  If the time doesnt's change,you can refer it to calculate for checking status.
264 264  )))
265 265  
266 -== ==
450 +(% class="wikigeneratedid" id="H" %)
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