Changes for page MQTT Forward Instruction

Last modified by Kilight Cao on 2024/08/31 16:26
<
From version < 51.1 >
edited by Xiaoling
on 2024/08/19 15:00
To version < 50.1 >
edited by Xiaoling
on 2022/09/02 18:11
>
Change comment: Renamed back-links.

Summary

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9 9  Dragino LoRa/LoRaWAN gateway support MQTT forwarding. It can forward the sensor data from LoRa network to MQTT server , and vice verse.
10 10  
11 11  
12 +
12 12  == 1.1  Support Devices ==
13 13  
14 14  
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23 23  * MS14 series if installed with the same firmware. (in this case, the MQTT forward will work , but no LoRa support)
24 24  
25 25  
27 +
26 26  = 2.  Firmware Change Log for MQTT feature =
27 27  
28 28  
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34 34  ** Initiate version
35 35  
36 36  
39 +
37 37  = 3.  MQTT forward operating principle =
38 38  
42 +
39 39  == 3.1  Network Structure ==
40 40  
41 41  
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44 44  * **For Uplink:**  The sensor sends data to LoRa Gateway via LoRa wireless, The gateway will process these data and forward to remote MQTT Broker via Internet.
45 45  * **For Downlink:** The gateway subscribe a topic in the MQTT broker, when there is update on the topic, the gateway will know and broadcast the data to Local LoRa network.
46 46  
51 +
47 47  [[image:image-20220527133547-1.png]]
48 48  
49 49  General MQTT structure
50 50  
51 51  
57 +
52 52  == 3.2  How sensor data is forwarded ==
53 53  
54 54  
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55 55  In this MQTT forward feature, the key point is how the gateway process the sensor data.
56 56  
57 57  
64 +
58 58  === 3.2.1  Upstream ===
59 59  
60 60  
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62 62  
63 63  (((
64 64  The data flow works as below diagram.
72 +
73 +
65 65  )))
66 66  
67 67  [[image:image-20220527134000-2.png]]
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78 78  
79 79  (((
80 80  
90 +
91 +
81 81  )))
82 82  
83 83  === 3.2.2  Downstream ===
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87 87  
88 88  (((
89 89  Below are the data flow for downstream.
101 +
102 +
90 90  )))
91 91  
92 92  [[image:image-20220527134038-3.png]]
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94 94  Downstream path
95 95  
96 96  
110 +
97 97  == 3.3  Macro Definition ==
98 98  
99 99  
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102 102  (((
103 103  Currently the (% style="color:#4f81bd" %)**-t (topic)**(%%) and (% style="color:#4f81bd" %)**-m (message)**(%%) support Macros.
104 104  
119 +
105 105  
106 106  )))
107 107  
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115 115  * HOSTNAME: Device Hostname
116 116  
117 117  
133 +
118 118  === 3.3.2  -m message macro ===
119 119  
120 120  
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125 125  * JSON: Convert META to json format.
126 126  
127 127  
144 +
128 128  === 3.3.3  Example for Macro ===
129 129  
130 130  
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150 150  )))
151 151  
152 152  
170 +
153 153  == 3.4  Modify the MQTT to support more options ==
154 154  
155 155  
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277 277  )))
278 278  
279 279  
298 +
280 280  = 4.  Example to communicate to a simple MQTT server =
281 281  
301 +
282 282  == 4.1  Overview ==
283 283  
284 284  
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285 285  This section is an example to show how to set up LG01-N to communicate with a MQTT server. The MQTT server is a simple utility set up in a local PC. Note: User can set up same server via [[this instruction>>url:http://www.steves-internet-guide.com/install-mosquitto-broker/]].
286 286  
287 287  
308 +
288 288  == 4.2  Simulate via MQTT.fx utility ==
289 289  
290 290  
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313 313  Downstream: Subscribe a topic to get downstream
314 314  
315 315  
337 +
316 316  == 4.3  Simulate via Dragino Command Line ==
317 317  
318 318  
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334 334  mosquitto_pub
335 335  
336 336  
359 +
337 337  (% style="color:blue" %)**For Downstream**
338 338  
339 339  Use [[mosquitto_sub>>url:https://mosquitto.org/man/mosquitto_sub-1.html]] to subscribe the change on the topic.
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343 343  mosquitto_sub
344 344  
345 345  
369 +
346 346  == 4.4  Configure Dragino UI for MQTT connection ==
347 347  
348 348  
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366 366  forward to MQTT
367 367  
368 368  
393 +
369 369  === 4.4.1  Configure the MQTT Client for Upstream ===
370 370  
371 371  
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386 386  MQTT Publish configure
387 387  
388 388  
414 +
389 389  [[image:image-20220527135929-13.png]]
390 390  
391 391  MQTT Channel settings
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414 414  MQTT Publish
415 415  
416 416  
443 +
417 417  === 4.4.2  Configure the MQTT Client for Downstream ===
418 418  
419 419  
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477 477  * Downstream: Listening broadcast message from gateway, and print it in console.
478 478  * The LoRa parameter settings in Arduino should match the LoRa settings in gateway, as below:
479 479  
507 +
480 480  [[image:image-20220527140354-18.png]]
481 481  
482 482  LoRa Parameter should match
483 483  
484 484  
513 +
485 485  Below is the test result after the Arduino Sketch is running.
486 486  
487 487  [[image:image-20220527140459-19.png]]
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489 489  Upstream Data Flow
490 490  
491 491  
521 +
492 492  [[image:image-20220527140542-20.png]]
493 493  
494 494  Downstream Data Flow
495 495  
496 496  
527 +
497 497  === 4.5.2  Use LoRaWAN Protocol for communication ~-~- For LG308/LPS8/DLOS8 ===
498 498  
499 499  
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530 530  [[image:image-20220613191345-4.png]]
531 531  
532 532  
564 +
533 533  (% style="color:blue" %)**Step 4**(%%): Map the Device Address to Remote ID in MQTT server.
534 534  
535 535  [[image:image-20220613190635-2.png]]
536 536  
537 537  
570 +
538 538  (% style="color:blue" %)**Step 5: Upstream**(%%): Save the change, we can see the log info via "sytem log", End Node and MQTT Server
539 539  
540 540  [[image:image-20220527141843-24.png]]
541 541  
542 542  
576 +
577 +
543 543  [[image:image-20220527141933-25.png]]
544 544  
545 545  Choose ASCII Format
546 546  
547 547  
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548 548  [[image:image-20220527142028-26.png]]
549 549  
550 550  LHT65 Decoder
551 551  
552 552  
589 +
553 553  (% style="color:blue" %)**Step 6: Set up subscribe**(%%)**:** Subscribe a topci for downstream.
554 554  
555 555  [[image:image-20220613191426-5.png]]
556 556  
557 557  
595 +
558 558  (% style="color:blue" %)**Step 7: Downstream**(%%): Save the change, we can see the log info via "sytem log", End Node and MQTT Server.
559 559  
560 560  [[image:image-20220527142239-28.png]]
561 561  
562 562  
601 +
563 563  === 4.5.3 MQTT Downstream format ===
564 564  
565 565  
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588 588  Check out this link for more mosquito-related directives [[https:~~/~~/mosquitto.org/man/mosquitto_pub-1.html>>https://mosquitto.org/man/mosquitto_pub-1.html]]
589 589  
590 590  
630 +
591 591  = 5.  How to Debug =
592 592  
593 593  
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594 594  User can login the gateway's console and run (% style="color:#4f81bd" %)**logread -f**(%%). It will shows the output when there is packet arrive.User can see if it is correct.
595 595  
596 596  
637 +
597 597  = 6.  How to ask for Support =
598 598  
599 599  

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