Changes for page MQTT Forward Instruction

Last modified by Xiaoling on 2022/09/02 18:11
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From version < 46.2 >
edited by Xiaoling
on 2022/07/14 16:19
To version < 49.2 >
edited by Xiaoling
on 2022/08/09 16:18
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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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47 47  Below shows the network structure for MQTT forwarding.
48 48  
49 49  * **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.
50 -* **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,
51 +* **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.
51 51  
53 +
54 +
52 52  [[image:image-20220527133547-1.png]]
53 53  
54 54  General MQTT structure
55 55  
56 56  
60 +
57 57  == 3.2  How sensor data is forwarded ==
58 58  
59 59  
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60 60  In this MQTT forward feature, the key point is how the gateway process the sensor data.
61 61  
62 62  
67 +
63 63  === 3.2.1  Upstream ===
64 64  
70 +
65 65  Assume there are two sensor nodes, their ID are Node1 ID: 6734 , Node2 ID: 7456. In the remote MQTT broker there are two topics: Topic1: /channel/765800, Topic2: /channel/367860. We can set up in the gateway to map Node1 to Topic1 and Node2 to Topic2. So when there is a sensor data from Node1, the gateway will forward the data to Topic1, when there is sensor data from Node2, the gateway will forward to Topic2.
66 66  
67 67  (((
68 68  The data flow works as below diagram.
75 +
76 +
69 69  )))
70 70  
71 71  [[image:image-20220527134000-2.png]]
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82 82  
83 83  (((
84 84  
93 +
94 +
85 85  )))
86 86  
87 87  === 3.2.2  Downstream ===
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91 91  
92 92  (((
93 93  Below are the data flow for downstream.
104 +
105 +
94 94  )))
95 95  
96 96  [[image:image-20220527134038-3.png]]
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98 98  Downstream path
99 99  
100 100  
113 +
101 101  == 3.3  Macro Definition ==
102 102  
103 103  
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106 106  (((
107 107  Currently the (% style="color:#4f81bd" %)**-t (topic)**(%%) and (% style="color:#4f81bd" %)**-m (message)**(%%) support Macros.
108 108  
122 +
109 109  
110 110  )))
111 111  
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118 118  * USERNAME: User ID (-u)
119 119  * HOSTNAME: Device Hostname
120 120  
135 +
136 +
137 +
121 121  === 3.3.2  -m message macro ===
122 122  
123 123  
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127 127  * META: Completely sensor data with time stamp and rssi
128 128  * JSON: Convert META to json format.
129 129  
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148 +
149 +
130 130  === 3.3.3  Example for Macro ===
131 131  
132 132  
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290 290  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/]].
291 291  
292 292  
313 +
293 293  == 4.2  Simulate via MQTT.fx utility ==
294 294  
295 295  
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321 321  
322 322  == 4.3  Simulate via Dragino Command Line ==
323 323  
345 +
324 324  For first try of MQTT connection, simulate via command line is recommend, there are many servers / connection type for MQTT. They are using different connection parameters. Simulating the connection via command line will help us rapidly connect to server and debug.
325 325  
326 326  In the Dragino Gateway, we use [[mosquitto client>>url:https://mosquitto.org/]] for MQTT connection.
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349 349  mosquitto_sub
350 350  
351 351  
374 +
352 352  == 4.4  Configure Dragino UI for MQTT connection ==
353 353  
377 +
354 354  This chapter are step by step to show to configure the Dragino Menu for MQTT auto connection.
355 355  
356 356  (((
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459 459  In above section, we have configured the UI to support MQTT upstream and downstream. We can simulate via Linux command. In this section, we will guide how to communicate with remote LoRa End Node for upstream and downstream.
460 460  
461 461  
486 +
462 462  === 4.5.1  Use LoRa Raw protocol for communication ~-~- For LG01/LG02 ===
463 463  
464 464  
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484 484  * Downstream: Listening broadcast message from gateway, and print it in console.
485 485  * The LoRa parameter settings in Arduino should match the LoRa settings in gateway, as below:
486 486  
512 +
513 +
487 487  [[image:image-20220527140354-18.png]]
488 488  
489 489  LoRa Parameter should match
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515 515  When use test this feature, please use the version higher then : (% style="color:#4f81bd" %)**LG02_LG08~-~-build-v5.4.1593400722-20200629-1120**(%%), in this version, the upload format is changed and readable, which is easier for integration.
516 516  
517 517  
518 -(% style="color:#4f81bd" %)**Video Instruction**(%%): (% style="color:blue" %)[[https:~~/~~/youtu.be/qJTY441-t90>>url:https://youtu.be/qJTY441-t90]]
545 +(% style="color:blue" %)**Video Instruction**(%%): (% style="color:blue" %)[[https:~~/~~/youtu.be/qJTY441-t90>>url:https://youtu.be/qJTY441-t90]]
519 519  )))
520 520  
521 521  (((
522 -(% style="color:blued" %)**Step 1**(%%): Refer [[Communicate with ABP End Node>>Communicate with ABP End Node without LoRaWAN Network Server --- LG308]] to know how to set up LG308 to work with LoRaWAN End node.
549 +(% style="color:blue" %)**Step 1**(%%): Refer [[Communicate with ABP End Node>>Communicate with ABP End Node without LoRaWAN Network Server --- LG308]] to know how to set up LG308 to work with LoRaWAN End node.
523 523  )))
524 524  
525 525  (((
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592 592  
593 593  (% class="box infomessage" %)
594 594  (((
595 -**mosquitto_pub -h 10.130.2.192 -p 1883 -t dragino-1d25dc/ -m "260211D,time,txt,hello,20,1,SF12,923300000,2 > /var/iot/push/test"**
622 +**mosquitto_pub -h 10.130.2.192 -p 1883 -t dragino-1d25dc/ -m "260211D,time,txt,hello,20,1,SF12,923300000,2"**
596 596  )))
597 597  
598 598  Or use [[MQTT.fx>>https://mqttfx.jensd.de/index.php/download]]
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613 613  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.
614 614  
615 615  
643 +
616 616  = 6.  How to ask for Support =
617 617  
618 618  

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