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Last modified by Xiaoling on 2022/09/02 18:11
From version 26.1
edited by Xiaoling
on 2022/05/31 14:13
Change comment: Uploaded new attachment "image-20220531141303-26.png", version {1}
To version 44.5
edited by Xiaoling
on 2022/05/31 14:33
Change comment: There is no comment for this version

Summary

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Content
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1 +**Contents: **
2 +
1 1  {{toc/}}
2 2  
3 3  
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21 21  * Notification mechanism, notify the transmission of both sides when an exception occurs
22 22  
23 23  
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24 24  = 3. What does this example shows? How it works? =
25 25  
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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.
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27 27  
28 28  [[image:image-20220531135402-1.png]]
29 29  
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37 37  
38 38  [[image:image-20220531135521-3.png]]
39 39  
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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.
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41 41  
42 42  
43 43  
44 44  [[image:image-20220531135607-4.png]]
45 45  
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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.
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47 47  
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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.
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49 49  
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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/]] .
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51 51  
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53 53  = 4. Preparation =
54 54  
55 55  == 4.1 Hardware ==
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64 64  The LoRa End node keeps getting temperature and humidity from the sensor and sends out via LoRa periodically.
65 65  )))
66 66  
67 -
68 68  == 4.2 Software ==
69 69  
70 70  1. [[4.3.4 version>>url:http://www.dragino.com/downloads/index.php?dir=motherboards/ms14/Firmware/IoT/]]
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73 73  1. [[DHTlib>>url:https://github.com/goodcheney/Lora/blob/patch-1/Lora%20Shield/Examples/DHTlib.zip]]
74 74  
75 75  
89 +
76 76  == 4.3 Server(For example) ==
77 77  
78 78  * [[ThingSpeak>>url:https://thingspeak.com/]]
79 79  
80 80  
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81 81  == 4.4 Configure IoT Server ==
82 82  
83 83  * Need this keys:
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98 98  [[image:image-20220531140304-12.png]]
99 99  )))
100 100  
101 -
102 102  == 4.5 Configure LG01 settings ==
103 103  
104 104  Tips:Please confirm that your LG01 version is 4.3.3.
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191 191  
192 192  
193 193  )))
194 -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]](((
208 +1. (((
209 +[[image:image-20220531141400-27.png]]
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195 195  Check the settings.
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196 196  )))
197 -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]](((
216 +1. (((
217 +[[image:image-20220531141601-30.png]]
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198 198  input this command.
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199 199  )))
200 -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]](((
224 +1. [[image:image-20220531141515-29.png]](((
201 201  Check the result.
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202 202  )))
203 203  
204 204  == 4.7 Updata data to Server(Through MQTT) ==
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210 210  1. Send reply after then receive LoRa node data.
211 211  1. Sketch will write active content to /tmp/iot/status periodically (every 5 minutes).(Watchdog feature)
212 212  
213 -
214 -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]](((
240 +1. [[image:image-20220531141656-31.png]](((
215 215  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.
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216 216  )))
217 -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]](((
246 +1. [[image:image-20220531141800-32.png]](((
218 218  Open Serial monitor.
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219 219  )))
220 -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]](((
252 +1. [[image:image-20220531141842-33.png]](((
221 221  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.
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222 222  )))
223 -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]](((
258 +1. [[image:image-20220531141927-34.png]](((
224 224  Open Serial monitor.
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225 225  )))
226 226  1. Go to IoT Server to check the result.
227 227  1. (((
228 -[[~[~[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]]
266 +[[image:image-20220531142023-35.png]]
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229 229  )))
230 230  1. (((
231 -[[~[~[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]]
272 +[[image:image-20220531142155-36.png]]
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232 232  )))
233 233  
234 234  = 5. FAQ =
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239 239  
240 240  For example: for ThingSpeak, a MQTT publish command is:
241 241  
242 -{{{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"
243 -}}}
286 +(% class="box infomessage" %)
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288 +**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"**
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244 244  
245 245  What now we need to put in the LG01 is how to combine this command.
246 246  
247 247  1. LG01 web console -> Sensor -> MQTT
248 248  1. Choose general Server
249 -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]](((
295 +1. [[image:image-20220531142342-37.png]](((
250 250  Refer to your server to fill in.
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251 251  )))
252 -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]](((
301 +1. [[image:image-20220531142447-38.png]](((
253 253  Ex:ThingSpeak Server
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254 254  )))
255 255  
256 256  According to MQTT commands: mosquitto_pub, we need to put
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269 269  
270 270  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:
271 271  
272 -[[~[~[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]]
323 +[[image:image-20220531142525-39.png]]
273 273  
274 274  MQTT Logread example
275 275  
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278 278  
279 279  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.
280 280  
281 -* [[~[~[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]](((
332 +* [[image:image-20220531142558-40.png]](((
282 282  Enable Sensor->Micro-Controller settings
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283 283  )))
284 -* [[~[~[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]](((
338 +* [[image:image-20220531142629-41.png]](((
285 285  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.
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286 286  )))
287 -* [[~[~[image:https://wiki.dragino.com/images/2/21/Loop.png~|~|height="181" width="388"~]~]>>url:https://wiki.dragino.com/index.php/File:Loop.png]](((
344 +* [[image:image-20220531142659-42.png]](((
288 288  Each time the function loops, it uses the watchdog function once.
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289 289  )))
290 -* [[~[~[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]](((
350 +* [[image:image-20220531142720-43.png]](((
291 291  Open SSH and check watchdog result.If the result change constantly,the feature enable successfully.
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292 292  )))
293 -* [[~[~[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]](((
356 +* [[image:image-20220531142748-44.png]](((
294 294  If the time doesnt's change,you can refer it to calculate for checking status.
295 295  )))
296 296  
297 -== ==
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