Changes for page MQTT Forward Instruction

Last modified by Kilight Cao on 2024/08/31 16:26
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From version < 3.1 >
edited by Xiaoling
on 2022/05/27 13:35
To version < 11.1 >
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7 7  
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 10  == 1.1 Support Devices ==
11 11  
12 12  This MQTT forward instruction is for below devices:
... ... @@ -37,7 +37,7 @@
37 37  * 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.
38 38  * 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,
39 39  
40 -[[image:https://wiki.dragino.com/images/thumb/4/45/MQTT_Forward_1.png/600px-MQTT_Forward_1.png||height="348" width="600"]]
41 +[[image:image-20220527133547-1.png]]
41 41  
42 42  General MQTT structure
43 43  
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55 55  The data flow works as below diagram.
56 56  )))
57 57  
58 -[[~[~[image:https://wiki.dragino.com/images/thumb/2/2a/MQTT_Forward_2.png/600px-MQTT_Forward_2.png~|~|height="355" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Forward_2.png]]
59 +[[image:image-20220527134000-2.png]]
59 59  
60 60  (((
61 61  Upstream path
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77 77  Below are the data flow for downstream.
78 78  )))
79 79  
80 -[[image:https://wiki.dragino.com/images/thumb/3/3a/MQTT_Forward_3.png/600px-MQTT_Forward_3.png||height="368" width="600"]]
81 +[[image:image-20220527134038-3.png]]
81 81  
82 82  Downstream path
83 83  
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87 87  The MQTT publish command use Macro settings to generate flexible upstream payload for MQTT publish.
88 88  
89 89  (((
90 -Currently the (% class="mark" %)**-t (topic)**(%%) and (% class="mark" %)**-m (message)**(%%) support Macros.
91 +Currently the (% style="color:#4f81bd" %)**-t (topic)**(%%) and (% style="color:#4f81bd" %)**-m (message)**(%%) support Macros.
92 +
93 +
91 91  )))
92 92  
93 93  === 3.3.1 -t topic macro ===
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108 108  
109 109  === 3.3.3 Example for Macro ===
110 110  
111 -[[image:https://wiki.dragino.com/images/thumb/c/c7/MQTT_Command_9.png/600px-MQTT_Command_9.png||height="385" width="600"]]
114 +[[image:image-20220527134251-4.png]]
112 112  
113 113  MQTT Publish configure
114 114  
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119 119  
120 120  When there is a LoRa sensor arrive. it will be store at the /var/iot/channels as below:
121 121  
122 -[[image:https://wiki.dragino.com/images/thumb/c/c4/MQTT_Command_20.png/600px-MQTT_Command_20.png||height="325" width="600"]]
125 +[[image:image-20220527134332-5.png]]
123 123  
124 124  Sensor Data
125 125  
126 126  (((
127 -According to above macro. Gateway will publish (% class="mark" %)**field1=22.0&field2=49.0**(%%) to topic: (% class="mark" %)**dragino-1b7060/78901/data**(%%), where 78901 is the remote channel for this node ID.
130 +According to above macro. Gateway will publish (% style="color:#4f81bd" %)**field1=22.0&field2=49.0**(%%) to topic: (% style="color:#4f81bd" %)**dragino-1b7060/78901/data**(%%), where 78901 is the remote channel for this node ID.
128 128  )))
129 129  
130 130  
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183 183  ~-~-help : display this message.
184 184  ~-~-repeat : if publish mode is -f, -m, or -s, then repeat the publish N times.
185 185  ~-~-repeat-delay : if using ~-~-repeat, wait time seconds between publishes. Defaults to 0.
186 -~-~-quiet : (% class="mark" %)don't print error messages.
189 +~-~-quiet : (% style="color:red" %)don't print error messages.
187 187  ~-~-will-payload : payload for the client Will, which is sent by the broker in case of
188 188   unexpected disconnection. If not given and will-topic is set, a zero
189 189   length message will be sent.
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221 221  
222 222  (% class="box" %)
223 223  (((
224 -# Call MQTT Publish command
227 +//# Call MQTT Publish command
225 225  \\# 1. Case with User, Password and Client ID present  (e.g. Azure)
226 226  if [ ! -z "$pass" ] && [ ! -z "$user" ] && [ ! -z "$clientID" ]; then
227 227  case="1" 
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248 248  mosquitto_pub $D -h $server -p $port -q $pub_qos  -t $pub_topic -u $user -P "$pass" $PUB_FLAG "$mqtt_data"
249 249  \\# 0. Else - invalid parameters, just log
250 250  else
251 -case="Invalid parameters" 
252 -logger "[IoT.MQTT]:Invalid Parameters - mosquitto_pub not called."
253 -fi
254 +case="(% style="color:red" %)Invalid parameters" (%%)
255 +logger (% style="color:red" %)"[IoT.MQTT]:Invalid Parameters - mosquitto_pub not called."(%%)
256 +fi//
254 254  )))
255 255  
256 256  
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260 260  
261 261  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/]].
262 262  
266 +
263 263  == 4.2 Simulate via MQTT.fx utility ==
264 264  
265 265  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.
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268 268  In this test, the MQTT broker and MQTT.fx are installed in the same PC, so the MQTT server address in MQTT.fx should be localhost. Below shows how to connect to the server.
269 269  )))
270 270  
271 -[[image:https://wiki.dragino.com/images/thumb/0/06/MQTT_Forward_4.png/600px-MQTT_Forward_4.png||height="201" width="600"]]
275 +[[image:image-20220527134929-6.png]]
272 272  
273 273  Connect to MQTT Broker
274 274  
279 +
275 275  After connected, use publish to public some thing to MQTT server. This to simulate upsteam
276 276  
277 -[[image:https://wiki.dragino.com/images/thumb/b/bd/MQTT_Forward_5.png/600px-MQTT_Forward_5.png||height="149" width="600"]]
282 +[[image:image-20220527135037-7.png]]
278 278  
279 279  Upstream: Publish message to MQTT Broker
280 280  
286 +
281 281  To simulate a downstream, use MQTT.fx to subscribe a topic, and publish something to this topic. as Below:
282 282  
283 -[[image:https://wiki.dragino.com/images/thumb/3/3d/MQTT_Forward_6.png/600px-MQTT_Forward_6.png||height="279" width="600"]]
289 +[[image:image-20220527135215-8.png]]
284 284  
285 285  Downstream: Subscribe a topic to get downstream
286 286  
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