<
From version < 17.1 >
edited by Xiaoling
on 2022/05/27 14:01
To version < 22.2 >
edited by Xiaoling
on 2022/05/27 14:05
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396 396  mosquitto_sub -h 192.168.199.148 -p 1883 -i dragino-1b7060 -t command.
397 397  )))
398 398  
399 -[[image:https://wiki.dragino.com/images/3/36/MQTT_Command_12.png||height="173" width="579"]]
399 +[[image:image-20220527140100-15.png]]
400 400  
401 401  MQTT Subscribe
402 402  
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405 405  When MQTT broker receive a update on this topic, the gateway will get the update and use LoRa radio to broadcast this message. The LoRa parameters used for update is:
406 406  )))
407 407  
408 -[[image:https://wiki.dragino.com/images/thumb/b/b8/MQTT_Command_13.png/600px-MQTT_Command_13.png||height="300" width="600"]]
408 +[[image:image-20220527140148-16.png]]
409 409  
410 410  LoRa Broadcast parameters.
411 411  
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412 412  
413 413  And below is the subscribe simulation:
414 414  
415 -[[image:https://wiki.dragino.com/images/thumb/6/60/MQTT_Command_14.png/600px-MQTT_Command_14.png||height="255" width="600"]]
415 +[[image:image-20220527140238-17.png]]
416 416  
417 417  downstream simulation
418 418  
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421 421  
422 422  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.
423 423  
424 +
424 424  === 4.5.1 Use LoRa Raw protocol for communication ~-~- For LG01/LG02 ===
425 425  
426 426  (((
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443 443  * Downstream: Listening broadcast message from gateway, and print it in console.
444 444  * The LoRa parameter settings in Arduino should match the LoRa settings in gateway, as below:
445 445  
446 -[[image:https://wiki.dragino.com/images/thumb/3/3b/MQTT_Command_17.png/600px-MQTT_Command_17.png||height="197" width="600"]]
447 +[[image:image-20220527140354-18.png]]
447 447  
448 448  LoRa Parameter should match
449 449  
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450 450  
451 451  Below is the test result after the Arduino Sketch is running.
452 452  
453 -[[image:https://wiki.dragino.com/images/thumb/6/63/MQTT_Command_18.png/600px-MQTT_Command_18.png||height="319" width="600"]]
454 +[[image:image-20220527140459-19.png]]
454 454  
455 455  Upstream Data Flow
456 456  
457 -[[image:https://wiki.dragino.com/images/thumb/1/18/MQTT_Command_19.png/600px-MQTT_Command_19.png||height="309" width="600"]]
458 458  
459 +[[image:image-20220527140542-20.png]]
460 +
459 459  Downstream Data Flow
460 460  
461 461  
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