Changes for page ThingsBoard

Last modified by Dilisi S on 2025/04/23 19:23
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From version < 144.1 >
edited by Dilisi S
on 2025/03/09 04:11
To version < 129.1 >
edited by Dilisi S
on 2025/03/08 22:02
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379 379  [[image:new-integration-pending.png]]
380 380  
381 381  
382 -= 5. Verifying the receipt of data from virtual devices =
382 += 5. Verifying the receipt of data from the device =
383 383  
384 384  
385 -== 5.1 How does it work? ==
385 +On the terminal, issue the following MQTT command which simulates the device S31B-NB.
386 386  
387 -
388 -We use the Mosquitto MQTT client to simulate MQTT messages, acting as a virtual device. First, install the Mosquitto client on your computer from [[this link>>url:https://mosquitto.org/download/]]. The Mosquitto client publishes messages to the MQTT broker (HiveMQ) on a specified MQTT topic. ThingsBoard subscribes to these messages using the same topic.
389 -
390 -The Mosquitto client publishes messages on the topic v1/devices/[device_name]/telemetry. The [device_name]placeholder can be replaced with any device name, for example, 'S31B-NB'. Then, the MQTT topic would be v1/devices/S31B-NB/telemetry.
391 -
392 -On the ThingsBoard side, we configure the MQTT topic subscription as v1/devices/+/telemetry. The + wildcard represents any device name and allows ThingsBoard to automatically create (provision) a device with that name, such as S31B-NB, for example.
393 -
394 -
395 -**The new device is created the first time the MQTT topic is received. For subsequent MQTT topics with the same device name, no duplicate devices will be created.**
396 -
397 -
398 -For example, if you send two MQTT messages with different device names in the topic:
399 -
400 -1. v1/devices/**S31B-NB**/telemetry
401 -1. v1/devices/**LDS25-NB**/telemetry
402 -
403 -ThingsBoard will create two devices named **S31B-NB** and **LDS25-NB** in the **//Devices//** section.
404 -
405 -
406 -The MQTT payload format is as follows, which is common for all ~-~-NB and ~-~-CB series devices:
407 -
408 408  {{code language="none"}}
409 -{"temperature":10.4, "humidity":85}
388 +mosquitto_pub -d -q 1 -h mqtt.eu.thingsboard.cloud -p 1883 -t v1/devices/S31B-NB/telemetry -u "24vk3w9h7sqdld1me5eh" -m "{temperature:20}"
410 410  {{/code}}
411 411  
412 -
413 -== 5.2 Sending messages ==
414 -
415 -
416 -On the terminal, issue the following MQTT command which simulates the device S31B-NB. The message payload contains the fields temperature and humidity, which hold the values 10.4 and 85, respectively. This payload is also (technically) known as telemetry.
417 -
418 -{{code language="none"}}
419 -mosquitto_pub -d -q 1 -h 011731f7928541588a6cdfbbedfc63f4.s1.eu.hivemq.cloud -p 8883 -t "tb/mqtt-integration-tutorial/sensors/S31B-NB/telemetry" -u "pradeeka" -P "Kalpani123@" -m '{"temperature":10.4, "humidity":85}'
420 -{{/code}}
421 -
422 -If the integration was performed without errors, the status of the integration changes to 'Active' after the first telemetry transmission.
423 -
424 -
425 -[[image:integration-active.png]]
426 -
427 -
428 -Also, a new device named **S31B-NB** will appear under **//Entities -> Devices -> All//**. This means the first MQTT message triggers ThingsBoard to provision a device named **S31B-NB**.
429 -
430 -
431 -[[image:device-provision-1.png]]
432 -
433 -
434 -Click on the device S31B-NB on the devices list to see its details.
435 -
436 -Then go to the **Latest telemetry** tab.
437 -
438 -You can see the fields temperature and humidity with the values you previously sent using the MQTT message.
439 -
440 -
441 -[[image:telemetry-1.png]]
442 -
443 -
444 -Now, change the values of the fields and send the MQTT message again. For example, set temperature to 20 and humidity to 70. Observe how the values update in //Latest Telemetry//.
445 -
446 -
447 -[[image:telemetry-2.png]]
448 -
449 -
450 -Let's provision the second device named **LDS25-NB **with initial telemetry. Use the following MQTT message.
451 -
452 -
453 -{{code language="none"}}
454 -mosquitto_pub -d -q 1 -h 011731f7928541588a6cdfbbedfc63f4.s1.eu.hivemq.cloud -p 8883 -t "tb/mqtt-integration-tutorial/sensors/LDS25-NB/telemetry" -u "pradeeka" -P "Kalpani123@" -m '{"temperature":11, "humidity":87}'
455 -{{/code}}
456 -
457 -Now, refresh the **Devices** page, and you will see the second device, **LDS25-NB**, which was recently provisioned.
458 -
459 -
460 -[[image:device-provision-2.png]]
461 -
462 -
463 -= 6. Creating a Dashboard =
464 -
465 -
466 -In ThingsBoard, from the left navigation menu, click **Dashboards**. Then, click the **+** button and select **Create new dashboard** from the dropdown menu.
467 -
468 -
469 -[[image:dashboard-1.png]]
470 -
471 -
472 -In the **Title** text box, enter **NB/CB Test Dashboard** as the title of the dashboard.
473 -
474 -Click on the **Add** button.
475 -
476 -
477 -[[image:dashboard-2.png||height="526" width="500"]]
478 -
479 -
480 -Click on the **Add widget / Add new widget** button.
481 -
482 -
483 -[[image:dashboard-3.png]]
484 -
485 -
486 -
487 -
488 -
391 +If the integration was performed without errors, after the transmission of the first telemetry, a new device with the name “S31B-NB” will appear in the Devices → All. Also, you can verify the input and output data, respectively, before and after conversion in Data converters → UDP Uplink Converter NB/CB → Events.
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