Changes for page MQTT Forward Instruction

Last modified by Xiaoling on 2022/09/02 18:11
<
From version < 43.1 >
edited by Kilight Cao
on 2022/06/13 19:28
To version < 44.6 >
edited by Xiaoling
on 2022/07/14 15:57
>
Change comment: There is no comment for this version

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Author
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1 -XWiki.Kilight
1 +XWiki.Xiaoling
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1 -**~ Contents：**
1 +**~ Table of Contents：**
2 2  
3 3  {{toc/}}
4 4  
5 5  
6 -= 1. Introduction =
6 += 1.  Introduction =
7 7  
8 +
8 8  Dragino LoRa/LoRaWAN gateway support MQTT forwarding. It can forward the sensor data from LoRa network to MQTT server , and vice verse.
9 9  
10 10  
11 -== 1.1 Support Devices ==
12 +== 1.1  Support Devices ==
12 12  
14 +
13 13  This MQTT forward instruction is for below devices:
14 14  
15 15  * Firmware Version > LG02_LG08-5.3.1580178039 [[Firmware Download>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]]
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22 22  
23 23  
24 24  
25 -= 2. Firmware Change Log for MQTT feature =
27 += 2.  Firmware Change Log for MQTT feature =
26 26  
29 +
27 27  (((
28 28  This instruction is wrote start from LG02_LG08-5.3.1580178039. Below is related change log since this version of firmware.
29 29  )))
... ... @@ -33,14 +33,16 @@
33 33  
34 34  
35 35  
36 -= 3. MQTT forward operating principle =
39 += 3.  MQTT forward operating principle =
37 37  
38 -== 3.1 Network Structure ==
39 39  
42 +== 3.1  Network Structure ==
43 +
44 +
40 40  Below shows the network structure for MQTT forwarding.
41 41  
42 -* 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.
43 -* 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,
47 +* **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.
48 +* **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,
44 44  
45 45  [[image:image-20220527133547-1.png]]
46 46  
... ... @@ -47,12 +47,13 @@
47 47  General MQTT structure
48 48  
49 49  
50 -== 3.2 How sensor data is forwarded ==
55 +== 3.2  How sensor data is forwarded ==
51 51  
57 +
52 52  In this MQTT forward feature, the key point is how the gateway process the sensor data.
53 53  
54 54  
55 -=== 3.2.1 Upstream ===
61 +=== 3.2.1  Upstream ===
56 56  
57 57  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.
58 58  
... ... @@ -64,10 +64,12 @@
64 64  
65 65  (((
66 66  Upstream path
73 +
74 +
67 67  )))
68 68  
69 69  (((
70 -Note: The sensor data can base or LoRa or other method, as long as there are data on the file /var/iot/channels. /span>
78 +(% style="color:red" %)**Note: The sensor data can base or LoRa or other method, as long as there are data on the file /var/iot/channels. /span>**
71 71  )))
72 72  
73 73  (((
... ... @@ -74,8 +74,9 @@
74 74  
75 75  )))
76 76  
77 -=== 3.2.2 Downstream ===
85 +=== 3.2.2  Downstream ===
78 78  
87 +
79 79  The gateway subscribes to a topic of the remote MQTT broker topic. When there is some one publish a value on this topic. The gateway will get it and broadcast to local LoRa Network.
80 80  
81 81  (((
... ... @@ -87,8 +87,9 @@
87 87  Downstream path
88 88  
89 89  
90 -== 3.3 Macro Definition ==
99 +== 3.3  Macro Definition ==
91 91  
101 +
92 92  The MQTT publish command use Macro settings to generate flexible upstream payload for MQTT publish.
93 93  
94 94  (((
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97 97  
98 98  )))
99 99  
100 -=== 3.3.1 -t topic macro ===
110 +=== 3.3.1  -t topic macro ===
101 101  
112 +
102 102  * CHANNEL: Remote Channel ID
103 103  * CLIENTID: Client ID , Same as -i
104 104  * WRITE_API: Remote Channel Write API
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107 107  
108 108  
109 109  
110 -=== 3.3.2 -m message macro ===
111 111  
122 +=== 3.3.2  -m message macro ===
123 +
124 +
112 112  * HOSTNAME: Device Hostname
113 113  * CHANNEL: Remote Channel ID
114 114  * DATA: Sensor Data without time stamp and rssi
... ... @@ -117,14 +117,16 @@
117 117  
118 118  
119 119  
120 -=== 3.3.3 Example for Macro ===
121 121  
134 +=== 3.3.3  Example for Macro ===
135 +
136 +
122 122  [[image:image-20220527134251-4.png]]
123 123  
124 124  MQTT Publish configure
125 125  
126 126  
127 -Above screen shots shows below format:
142 +**Above screen shots shows below format:**
128 128  
129 129  * -t: CLIENTID/CHANNEL/data
130 130  * -m: DATA
... ... @@ -141,8 +141,10 @@
141 141  )))
142 142  
143 143  
144 -== 3.4 Modify the MQTT to support more options ==
145 145  
160 +== 3.4  Modify the MQTT to support more options ==
161 +
162 +
146 146  The MQTT Client Utility used in Dragino is **mosquitto_pub** and **mosquitto_sub**. User can add more options to the mqtt commands. User can check the valid options by command mosquitto_pub ~-~-help. as below:
147 147  
148 148  (% class="box" %)
... ... @@ -160,9 +160,9 @@
160 160   [-u username [-P password]]
161 161   [~-~-will-topic [~-~-will-payload payload] [~-~-will-qos qos] [~-~-will-retain]]
162 162   [{~-~-cafile file | ~-~-capath dir} [~-~-cert file] [~-~-key file]
163 - [~-~-ciphers ciphers] [~-~-insecure]
164 - [~-~-tls-alpn protocol]
165 - [~-~-tls-engine engine] [~-~-keyform keyform] [~-~-tls-engine-kpass-sha1]]
180 + [~-~-ciphers ciphers] [~-~-insecure]
181 + [~-~-tls-alpn protocol]
182 + [~-~-tls-engine engine] [~-~-keyform keyform] [~-~-tls-engine-kpass-sha1]]
166 166   [~-~-psk hex-key ~-~-psk-identity identity [~-~-ciphers ciphers]]
167 167   [~-~-proxy socks-url]
168 168   [~-~-property command identifier value]
... ... @@ -267,15 +267,19 @@
267 267  )))
268 268  
269 269  
270 -= 4. Example to communicate to a simple MQTT server =
271 271  
272 -== 4.1 Overview ==
288 += 4.  Example to communicate to a simple MQTT server =
273 273  
290 +
291 +== 4.1  Overview ==
292 +
293 +
274 274  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/]].
275 275  
276 276  
277 -== 4.2 Simulate via MQTT.fx utility ==
297 +== 4.2  Simulate via MQTT.fx utility ==
278 278  
299 +
279 279  The [[MQTT.fx>>url:http://mqttfx.jensd.de/index.php/download]] is a MQTT client tool. We can use this to simulate a MQTT connection to our MQTT broker first to make sure the MQTT broker works. This will also help us understand how it works.
280 280  
281 281  (((
... ... @@ -301,14 +301,15 @@
301 301  Downstream: Subscribe a topic to get downstream
302 302  
303 303  
304 -== 4.3 Simulate via Dragino Command Line ==
305 305  
326 +== 4.3  Simulate via Dragino Command Line ==
327 +
306 306  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.
307 307  
308 308  In the Dragino Gateway, we use [[mosquitto client>>url:https://mosquitto.org/]] for MQTT connection.
309 309  
310 310  
311 -(% style="color:#4f81bd" %)**For Upstream**
333 +(% style="color:blue" %)**For Upstream**
312 312  
313 313  command is [[mosquitto_pub>>url:https://mosquitto.org/man/mosquitto_pub-1.html]]
314 314  
... ... @@ -321,8 +321,9 @@
321 321  mosquitto_pub
322 322  
323 323  
324 -(% style="color:#4f81bd" %)**For Downstream**
325 325  
347 +(% style="color:blue" %)**For Downstream**
348 +
326 326  Use [[mosquitto_sub>>url:https://mosquitto.org/man/mosquitto_sub-1.html]] to subscribe the change on the topic.
327 327  
328 328  [[image:image-20220527135440-10.png]]
... ... @@ -500,20 +500,18 @@
500 500  
501 501  (((
502 502  (((
503 -(% style="color:#4f81bd" %)**Step 3**(%%): Set up publish format and MQTT channel. The LG308 will store the Data from End node in (% style="color:#4f81bd" %)**HEX format**(%%) in the file. And we need to config the format to (% style="color:#4f81bd" %)**META**
526 +(% style="color:#4f81bd" %)**Step 3**(%%): Set up publish format and MQTT channel. The LG308 will store the Data from End node in (% style="color:#4f81bd" %)**HEX format**(%%) in the file.
504 504  )))
505 505  )))
506 506  
507 -[[image:image-20220527141450-22.png]]
530 +[[image:image-20220613191345-4.png]]
508 508  
509 -Publish mush use META as data format for LG308
510 510  
511 511  
512 512  (% style="color:#4f81bd" %)**Step 4**(%%): Map the Device Address to Remote ID in MQTT server.
513 513  
514 -[[image:image-20220527141727-23.png]]
536 +[[image:image-20220613190635-2.png]]
515 515  
516 -Map Dev Addr to remote ID
517 517  
518 518  
519 519  (% style="color:#4f81bd" %)**Step 5: Upstream**(%%): Save the change, we can see the log info via "sytem log", End Node and MQTT Server
... ... @@ -520,7 +520,6 @@
520 520  
521 521  [[image:image-20220527141843-24.png]]
522 522  
523 -Upstream Process
524 524  
525 525  
526 526  
... ... @@ -538,20 +538,40 @@
538 538  
539 539  (% style="color:#4f81bd" %)**Step 6: Set up subscribe**(%%)**:** Subscribe a topci for downstream.
540 540  
541 -[[image:image-20220527142115-27.png]]
561 +[[image:image-20220613191426-5.png]]
542 542  
543 -Subscribe to a topic
544 544  
545 545  
546 -
547 547  (% style="color:#4f81bd" %)**Step 7: Downstream**(%%): Save the change, we can see the log info via "sytem log", End Node and MQTT Server.
548 548  
549 549  [[image:image-20220527142239-28.png]]
550 550  
551 -Downstream Flow
552 552  
570 +
571 +=== MQTT Downstream format ===
572 +
573 +
574 +mosquitto_pub -h $server_address -p $server_port -t $Client_ID -m "**dev_addr,imme/time,txt/hex,payload**"
575 +
576 +(% class="box infomessage" %)
577 +(((
578 +mosquitto_pub -h 10.130.2.192 -p 1883 -t dragino-1d25dc/ -m "260211D,time,txt,hello"
579 +)))
580 +
581 +mosquitto_pub -h $server_address -p $server_port -t $Client_ID -m "**dev_addr,imme/time,txt/hex,payload,txpw,txbw,SF,frequency,rxwindow**"
582 +
583 +(% class="box infomessage" %)
584 +(((
585 +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"
586 +)))
587 +
588 +Or use [[MQTT.fx>>https://mqttfx.jensd.de/index.php/download]]
589 +
590 +[[image:image-20220613192816-6.png||height="440" width="1056"]]
591 +
553 553  (% style="color:red" %)**Notice: The text use for Downstream must meet the requirement from [[LG308 Downstream Payload>>Communicate with ABP End Node without LoRaWAN Network Server --- LG308||anchor="H2.2Downstream"]]**
554 554  
594 +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]]
555 555  
556 556  = 5. How to Debug =
557 557  

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