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Last modified by Xiaoling on 2022/09/02 18:11
From version 9.1
edited by Xiaoling
on 2022/05/31 14:00
Change comment: Uploaded new attachment "image-20220531140054-8.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]]
... ... @@ -73,108 +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
87 87  
88 88  
89 89  
90 90  )))
91 -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 +
92 92  Account->My Profile,MQTT API Key
136 +
137 +
138 +
93 93  )))
94 94  1. (((
95 -[[~[~[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]]
96 -)))
141 +[[image:image-20220531140304-12.png]]
97 97  
98 98  
144 +
145 +)))
146 +
99 99  == 4.5 Configure LG01 settings ==
100 100  
101 -Tips:Please confirm that your LG01 version is 4.3.3.
102 102  
103 -[[~[~[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.
104 104  
105 -Overview
106 106  
107 -[[~[~[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]]
108 108  
109 -Senosor->IOT Server
155 +**Overview**
110 110  
111 -[[~[~[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]]
112 112  
113 -MQTT->Configure MQTT Server
114 114  
115 -[[~[~[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]]
116 116  
117 -MQTT->MQTT Channel
161 +**Senosor->IOT Server**
118 118  
119 -[[~[~[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]]
120 120  
121 -Sensor->LoRa/LoraWAN
122 122  
123 -[[~[~[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]]
124 124  
125 -Configure network access.Network->Internet Access
167 +**MQTT->Configure MQTT Server**
126 126  
127 127  
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 +
128 128  == 4.6 Try MQTT API call with LG01 Linux command ==
129 129  
192 +
130 130  === 4.6.1 Input the command at the console ===
131 131  
132 -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 +
133 133  Open this Application.
200 +
201 +
202 +
134 134  )))
135 -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 +
136 136  Input passward(dragino).After into the console.
208 +
209 +
210 +
137 137  )))
138 -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 +
139 139  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 +
140 140  )))
141 -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 +
142 142  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 +
143 143  )))
144 -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 +
145 145  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 +
146 146  )))
147 147  
148 148  * This command:
149 149  
150 -{{{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"
151 -}}}
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 +)))
152 152  
153 153  * Need replace:
154 154  
155 -{{{UZ4NGHKJMKS9WR5E //MQTT API
156 -399171 //Channel ID
157 -A4NNF6G8G63JOIUV //Write API Key
158 -}}}
245 +(% class="box infomessage" %)
246 +(((
247 +**UZ4NGHKJMKS9WR5E  ~/~/MQTT API
248 +399171            ~/~/Channel ID
249 +A4NNF6G8G63JOIUV  ~/~/Write API Key**
250 +)))
159 159  
160 160  
253 +
161 161  === 4.6.2 Input the command at the console(LG01 new version:4.3.4) ===
162 162  
163 -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 +
164 164  Open this Application.
261 +
262 +
263 +
165 165  )))
166 -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 +
167 167  Check the settings.
270 +
271 +
272 +
168 168  )))
169 -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 +
170 170  input this command.
279 +
280 +
281 +
171 171  )))
172 -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 +
173 173  Check the result.
287 +
288 +
289 +
174 174  )))
175 175  
176 176  == 4.7 Updata data to Server(Through MQTT) ==
177 177  
294 +
178 178  * This version of Sketch implements these features:
179 179  
180 180  1. Read the LG01 configuration information from Linux.
... ... @@ -183,46 +183,86 @@
183 183  1. Sketch will write active content to /tmp/iot/status periodically (every 5 minutes).(Watchdog feature)
184 184  
185 185  
186 -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 +
187 187  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 +
188 188  )))
189 -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 +
190 190  Open Serial monitor.
316 +
317 +
318 +
191 191  )))
192 -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 +
193 193  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 +
194 194  )))
195 -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 +
196 196  Open Serial monitor.
332 +
333 +
334 +
197 197  )))
198 198  1. Go to IoT Server to check the result.
199 199  1. (((
200 -[[~[~[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 +
201 201  )))
202 202  1. (((
203 -[[~[~[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 +
204 204  )))
205 205  
206 206  = 5. FAQ =
207 207  
352 +
208 208  == 5.1 Configure to support general mqtt server ==
209 209  
355 +
210 210  First, try to run **mosquitto_pub** in Linux console to send a data to MQTT server.
211 211  
212 212  For example: for ThingSpeak, a MQTT publish command is:
213 213  
214 -{{{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"
215 -}}}
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 +)))
216 216  
217 217  What now we need to put in the LG01 is how to combine this command.
218 218  
219 219  1. LG01 web console -> Sensor -> MQTT
220 220  1. Choose general Server
221 -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 +
222 222  Refer to your server to fill in.
373 +
374 +
375 +
223 223  )))
224 -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 +
225 225  Ex:ThingSpeak Server
381 +
382 +
226 226  )))
227 227  
228 228  According to MQTT commands: mosquitto_pub, we need to put
... ... @@ -241,29 +241,54 @@
241 241  
242 242  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:
243 243  
244 -[[~[~[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]]
245 245  
403 +
246 246  MQTT Logread example
247 247  
248 248  
407 +
249 249  == 5.2 What is Watchdog feature? ==
250 250  
410 +
251 251  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.
252 252  
253 -* [[~[~[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]](((
254 254  Enable Sensor->Micro-Controller settings
416 +
417 +
418 +
255 255  )))
256 -* [[~[~[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 +
257 257  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 +
258 258  )))
259 -* [[~[~[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 +
260 260  Each time the function loops, it uses the watchdog function once.
432 +
433 +
434 +
261 261  )))
262 -* [[~[~[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 +
263 263  Open SSH and check watchdog result.If the result change constantly,the feature enable successfully.
440 +
441 +
442 +
264 264  )))
265 -* [[~[~[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 +
266 266  If the time doesnt's change,you can refer it to calculate for checking status.
267 267  )))
268 268  
269 -== ==
450 +(% class="wikigeneratedid" id="H" %)
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