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Last modified by Xiaoling on 2022/09/02 18:11
From version 15.1
edited by Xiaoling
on 2022/05/31 14:04
Change comment: Uploaded new attachment "image-20220531140425-14.png", version {1}
To version 50.3
edited by Xiaoling
on 2022/09/02 18:11
Change comment: Renamed from xwiki:Through MQTT to upload data.WebHome

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]]
... ... @@ -73,13 +73,21 @@
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 85  1. [[image:image-20220531140054-8.png]](((
... ... @@ -89,6 +89,8 @@
89 89  
90 90  )))
91 91  1. [[image:image-20220531140326-13.png]](((
133 +
134 +
92 92  Account->My Profile,MQTT API Key
93 93  
94 94  
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96 96  )))
97 97  1. (((
98 98  [[image:image-20220531140304-12.png]]
99 -)))
100 100  
101 101  
144 +
145 +)))
146 +
102 102  == 4.5 Configure LG01 settings ==
103 103  
104 -Tips:Please confirm that your LG01 version is 4.3.3.
105 105  
150 +Tips:  Please confirm that your LG01 version is 4.3.3.
151 +
152 +
106 106  [[image:image-20220531140248-11.png]]
107 107  
108 -Overview
155 +**Overview**
109 109  
110 110  
111 111  
112 -[[~[~[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]]
159 +[[image:image-20220531140425-14.png]]
113 113  
114 -Senosor->IOT Server
161 +**Senosor->IOT Server**
115 115  
116 -[[~[~[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]]
117 117  
118 -MQTT->Configure MQTT Server
119 119  
120 -[[~[~[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]]
165 +[[image:image-20220531140458-15.png]]
121 121  
122 -MQTT->MQTT Channel
167 +**MQTT->Configure MQTT Server**
123 123  
124 -[[~[~[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]]
125 125  
126 -Sensor->LoRa/LoraWAN
127 127  
128 -[[~[~[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]]
171 +[[image:image-20220531140538-16.png]]
129 129  
130 -Configure network access.Network->Internet Access
173 +**MQTT->MQTT Channel**
131 131  
132 132  
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 +
133 133  == 4.6 Try MQTT API call with LG01 Linux command ==
134 134  
192 +
135 135  === 4.6.1 Input the command at the console ===
136 136  
137 -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 +
138 138  Open this Application.
200 +
201 +
202 +
139 139  )))
140 -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 +
141 141  Input passward(dragino).After into the console.
208 +
209 +
210 +
142 142  )))
143 -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 +
144 144  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
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217 +
218 +
145 145  )))
146 -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 +
147 147  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 +
148 148  )))
149 -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 +
150 150  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 +
151 151  )))
152 152  
153 153  * This command:
154 154  
155 -{{{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"
156 -}}}
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 +)))
157 157  
158 158  * Need replace:
159 159  
160 -{{{UZ4NGHKJMKS9WR5E //MQTT API
161 -399171 //Channel ID
162 -A4NNF6G8G63JOIUV //Write API Key
163 -}}}
245 +(% class="box infomessage" %)
246 +(((
247 +**UZ4NGHKJMKS9WR5E  ~/~/MQTT API
248 +399171            ~/~/Channel ID
249 +A4NNF6G8G63JOIUV  ~/~/Write API Key**
250 +)))
164 164  
165 165  
253 +
166 166  === 4.6.2 Input the command at the console(LG01 new version:4.3.4) ===
167 167  
168 -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 +
169 169  Open this Application.
261 +
262 +
263 +
170 170  )))
171 -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 +
172 172  Check the settings.
270 +
271 +
272 +
173 173  )))
174 -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 +
175 175  input this command.
279 +
280 +
281 +
176 176  )))
177 -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 +
178 178  Check the result.
287 +
288 +
289 +
179 179  )))
180 180  
181 181  == 4.7 Updata data to Server(Through MQTT) ==
182 182  
294 +
183 183  * This version of Sketch implements these features:
184 184  
185 185  1. Read the LG01 configuration information from Linux.
... ... @@ -188,46 +188,86 @@
188 188  1. Sketch will write active content to /tmp/iot/status periodically (every 5 minutes).(Watchdog feature)
189 189  
190 190  
191 -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 +
192 192  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 +
193 193  )))
194 -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 +
195 195  Open Serial monitor.
316 +
317 +
318 +
196 196  )))
197 -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 +
198 198  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 +
199 199  )))
200 -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 +
201 201  Open Serial monitor.
332 +
333 +
334 +
202 202  )))
203 203  1. Go to IoT Server to check the result.
204 204  1. (((
205 -[[~[~[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 +
206 206  )))
207 207  1. (((
208 -[[~[~[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 +
209 209  )))
210 210  
211 211  = 5. FAQ =
212 212  
352 +
213 213  == 5.1 Configure to support general mqtt server ==
214 214  
355 +
215 215  First, try to run **mosquitto_pub** in Linux console to send a data to MQTT server.
216 216  
217 217  For example: for ThingSpeak, a MQTT publish command is:
218 218  
219 -{{{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"
220 -}}}
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 +)))
221 221  
222 222  What now we need to put in the LG01 is how to combine this command.
223 223  
224 224  1. LG01 web console -> Sensor -> MQTT
225 225  1. Choose general Server
226 -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 +
227 227  Refer to your server to fill in.
373 +
374 +
375 +
228 228  )))
229 -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 +
230 230  Ex:ThingSpeak Server
381 +
382 +
231 231  )))
232 232  
233 233  According to MQTT commands: mosquitto_pub, we need to put
... ... @@ -246,29 +246,54 @@
246 246  
247 247  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:
248 248  
249 -[[~[~[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]]
250 250  
403 +
251 251  MQTT Logread example
252 252  
253 253  
407 +
254 254  == 5.2 What is Watchdog feature? ==
255 255  
410 +
256 256  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.
257 257  
258 -* [[~[~[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]](((
259 259  Enable Sensor->Micro-Controller settings
416 +
417 +
418 +
260 260  )))
261 -* [[~[~[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 +
262 262  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 +
263 263  )))
264 -* [[~[~[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 +
265 265  Each time the function loops, it uses the watchdog function once.
432 +
433 +
434 +
266 266  )))
267 -* [[~[~[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 +
268 268  Open SSH and check watchdog result.If the result change constantly,the feature enable successfully.
440 +
441 +
442 +
269 269  )))
270 -* [[~[~[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 +
271 271  If the time doesnt's change,you can refer it to calculate for checking status.
272 272  )))
273 273  
274 -== ==
450 +(% class="wikigeneratedid" id="H" %)
451 +
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