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Last modified by Xiaoling on 2022/09/02 18:11
From version 21.1
edited by Xiaoling
on 2022/05/31 14:08
Change comment: Uploaded new attachment "image-20220531140842-20.png", version {1}
To version 43.3
edited by Xiaoling
on 2022/05/31 14:29
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23 23  
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  
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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  
52 52  
53 53  = 4. Preparation =
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141 141  
142 142  === 4.6.1 Input the command at the console ===
143 143  
144 -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]](((
154 +1. [[image:image-20220531140811-19.png]](((
145 145  Open this Application.
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146 146  )))
147 -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]](((
159 +1. [[image:image-20220531140842-20.png]](((
148 148  Input passward(dragino).After into the console.
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149 149  )))
150 -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]](((
164 +1. [[image:image-20220531140915-21.png]](((
151 151  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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152 152  )))
153 -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]](((
169 +1. [[image:image-20220531140955-22.png]](((
154 154  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.
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155 155  )))
156 -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]](((
175 +1. [[image:image-20220531141026-23.png]](((
157 157  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.
158 158  )))
159 159  
160 160  * This command:
161 161  
162 -{{{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"
163 -}}}
181 +(% class="box infomessage" %)
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183 +**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"**
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164 164  
165 165  * Need replace:
166 166  
167 -{{{UZ4NGHKJMKS9WR5E //MQTT API
168 -399171 //Channel ID
169 -A4NNF6G8G63JOIUV //Write API Key
170 -}}}
188 +(% class="box infomessage" %)
189 +(((
190 +**UZ4NGHKJMKS9WR5E  ~/~/MQTT API
191 +399171            ~/~/Channel ID
192 +A4NNF6G8G63JOIUV  ~/~/Write API Key**
193 +)))
171 171  
172 172  
173 173  === 4.6.2 Input the command at the console(LG01 new version:4.3.4) ===
174 174  
175 -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]](((
198 +1. [[image:image-20220531141150-24.png]](((
176 176  Open this Application.
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177 177  )))
178 -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]](((
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205 +[[image:image-20220531141400-27.png]]
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179 179  Check the settings.
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180 180  )))
181 -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]](((
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213 +[[image:image-20220531141601-30.png]]
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182 182  input this command.
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183 183  )))
184 -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]](((
220 +1. [[image:image-20220531141515-29.png]](((
185 185  Check the result.
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186 186  )))
187 187  
188 188  == 4.7 Updata data to Server(Through MQTT) ==
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195 195  1. Sketch will write active content to /tmp/iot/status periodically (every 5 minutes).(Watchdog feature)
196 196  
197 197  
198 -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]](((
237 +1. [[image:image-20220531141656-31.png]](((
199 199  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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200 200  )))
201 -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]](((
243 +1. [[image:image-20220531141800-32.png]](((
202 202  Open Serial monitor.
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203 203  )))
204 -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]](((
249 +1. [[image:image-20220531141842-33.png]](((
205 205  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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206 206  )))
207 -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]](((
255 +1. [[image:image-20220531141927-34.png]](((
208 208  Open Serial monitor.
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209 209  )))
210 210  1. Go to IoT Server to check the result.
211 211  1. (((
212 -[[~[~[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]]
263 +[[image:image-20220531142023-35.png]]
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213 213  )))
214 214  1. (((
215 -[[~[~[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]]
269 +[[image:image-20220531142155-36.png]]
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216 216  )))
217 217  
218 218  = 5. FAQ =
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223 223  
224 224  For example: for ThingSpeak, a MQTT publish command is:
225 225  
226 -{{{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"
227 -}}}
283 +(% class="box infomessage" %)
284 +(((
285 +**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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228 228  
229 229  What now we need to put in the LG01 is how to combine this command.
230 230  
231 231  1. LG01 web console -> Sensor -> MQTT
232 232  1. Choose general Server
233 -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]](((
292 +1. [[image:image-20220531142342-37.png]](((
234 234  Refer to your server to fill in.
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235 235  )))
236 -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]](((
298 +1. [[image:image-20220531142447-38.png]](((
237 237  Ex:ThingSpeak Server
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238 238  )))
239 239  
240 240  According to MQTT commands: mosquitto_pub, we need to put
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253 253  
254 254  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:
255 255  
256 -[[~[~[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]]
320 +[[image:image-20220531142525-39.png]]
257 257  
258 258  MQTT Logread example
259 259  
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262 262  
263 263  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.
264 264  
265 -* [[~[~[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]](((
329 +* [[image:image-20220531142558-40.png]](((
266 266  Enable Sensor->Micro-Controller settings
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267 267  )))
268 -* [[~[~[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]](((
335 +* [[image:image-20220531142629-41.png]](((
269 269  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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270 270  )))
271 -* [[~[~[image:https://wiki.dragino.com/images/2/21/Loop.png~|~|height="181" width="388"~]~]>>url:https://wiki.dragino.com/index.php/File:Loop.png]](((
341 +* [[image:image-20220531142659-42.png]](((
272 272  Each time the function loops, it uses the watchdog function once.
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273 273  )))
274 -* [[~[~[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]](((
347 +* [[image:image-20220531142720-43.png]](((
275 275  Open SSH and check watchdog result.If the result change constantly,the feature enable successfully.
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276 276  )))
277 -* [[~[~[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]](((
353 +* [[image:image-20220531142748-44.png]](((
278 278  If the time doesnt's change,you can refer it to calculate for checking status.
279 279  )))
280 280  
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