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329	329	[[image:data-converter-list-showing-uplink-dc.png]]
330	330
331	331
332		-== 3.2 Downlink ==
333	333
334	334
335		-On the **Data converters** page, click on the ‘**+**’ button, and then click on the **Create new converter** from the dropdown menu.
336	336
337	337
338		-[[image:create-new-converter-menu.png||width="500"]]
339		-
340		-
341		-
342		-The **Add data converter** window will appear. Name it ‘**MQTT Downlink Converter NB/CB**’ and select the Type as **Downlink**.
343		-
344		-Click on the **TBEL** button if not selected it by default. Now copy and paste the following encoder function written in **TBEL (ThingsBoard Expression Language)** in to the **code editor**. This encoder function is compatible for both NB and CB series devices.
345		-
346		-
347		-{{code language="JavaScript"}}
348		-// Encode downlink data from incoming Rule Engine message
349		-
350		-// msg - JSON message payload downlink message json
351		-// msgType - type of message, for ex. 'ATTRIBUTES_UPDATED', 'POST_TELEMETRY_REQUEST', etc.
352		-// metadata - list of key-value pairs with additional data about the message
353		-// integrationMetadata - list of key-value pairs with additional data defined in Integration executing this converter
354		-
355		-/** Encoder **/
356		-
357		-var data = {};
358		-
359		-// Process data from incoming message and metadata
360		-
361		-data.tempFreq = msg.temperatureUploadFrequency;
362		-data.humFreq = msg.humidityUploadFrequency;
363		-
364		-data.devSerialNumber = metadata['ss_serialNumber'];
365		-
366		-// Result object with encoded downlink payload
367		-var result = {
368		-
369		- // downlink data content type: JSON, TEXT or BINARY (base64 format)
370		- contentType: "JSON",
371		-
372		- // downlink data
373		- data: JSON.stringify(data),
374		-
375		- // Optional metadata object presented in key/value format
376		- metadata: {
377		- topic: metadata['deviceType']+'/'+metadata['deviceName']+'/upload'
378		- }
379		-
380		-};
381		-
382		-return result;
383		-{{/code}}
384		-
385		-
386		-Click on the **Add** button.
387		-
388		-
389		-[[image:add-downlink-data-converter.png||height="529" width="500"]]
390		-
391		-
392		-You should see that the newly added **MQTT Downlink** Converter NB/CB is listed on the **Data Converters** page.
393		-
394		-
395		-[[image:data-converters-list.png]]
396		-
397		-
398	398	= 4. Add Integration =
399	399
400	400
...	...	@@ -438,15 +438,17 @@
438	438
439	439	**Downlink data converter:**
440	440
441		-* Click on the **Select existing** button.
442		-* **Downlink data converter**: Select **MQTT Downlink Converter NB/CB **from the dropdown list.
	379	+Dragino NB/CB devices don't require a downlink data converter to decode their payloads, so you can skip this step.
443	443
444		-Click **Next** button.
	381	+* Click on the **Skip **button in the Downlink data converter section.
445	445
	383	+Click **Skip** button.
446	446
447		-[[image:add-integration-downlink-data-converter.png||height="511" width="500"]]
448	448
	386	+[[image:integration-dl-skip.png||height="511" width="500"]]
449	449
	388	+
	389	+
450	450	**Connection:**
451	451
452	452	* **Host**: Cluster URL (Eg. 011731f7xxxxxxxxxxxfbbedfc63f4.s1.eu.hivemq.cloud)
...	...	@@ -455,7 +455,7 @@
455	455	* **Enable SSL**: YES
456	456	* **Username**: Username (from your HiveMQ Cloud Cluster with your credentials)
457	457	* **Password:** Password (from your HiveMQ Cloud Cluster with your credentials)
458		-* **Topic: v1/devices/+/telemetry** (the + replaces any 'device name' will create a device in the Entities -> Devices)
	398	+* **Topic: v1/devices/me/telemetry** (The topic can be anything, even you can use just the device name, for example ts02-nb)
459	459	* **QoS:** 0-At most once
460	460
461	461	[[image:add-integration-connection.png||height="511" width="500"]]
...	...	@@ -582,8 +582,7 @@
582	582
583	583	First simulate a few messages using MQTT. This time, we have added the 'humidity' field to the payload. Eg:
584	584
585		-{{code language="none"}}mosquitto_pub -d -q 1 -h 011731f7928xxxxx.s1.eu.hivemq.cloud -p 8883 -t "v1/devices/me/telemetry" -u "xxxxx" -P "xxxxx" -m '{"IMEI": "S31B-NB", "temperature": 22, "humidity":80}'
586		-{{/code}}
	525	+{{code language="none"}}mosquitto_pub -d -q 1 -h 011731f7928xxxxx.s1.eu.hivemq.cloud -p 8883 -t "v1/devices/me/telemetry" -u "xxxxx" -P "xxxxx" -m '{"IMEI": "S31B-NB", "temperature": 22, "humidity":80}'{{/code}}
587	587
588	588
589	589	In **ThingsBoard**, from the left navigation menu, click **Dashboards**. Then, click the **+** button and select **Create new dashboard** from the dropdown menu.
...	...	@@ -659,7 +659,7 @@
659	659	= 7. Configure NB-IoT Sensor =
660	660
661	661
662		-Now, let's experiment with sending data to ThingsBoard using a real NB-IoT device. For example, we will use the **S31B-NB**.
	601	+Now, let's experiment with sending data to ThingsBoard using a real NB-IoT device. For example, we will use the **TS01-NB**.
663	663
664	664	First, configure the NB-IoT device with the necessary MQTT settings using AT commands. Below is a list of AT commands you can use.
665	665
...	...	@@ -675,10 +675,15 @@
675	675	* **AT+SERVADDR=<Broker address, Port>**
676	676
677	677	Test your uplink by pressing the ACT button for 1 second.
	617	+
678	678
679	679
680	680	The following image shows the uplink payload of a real Dragino device. The publish topic is **TS01-NB**, and the device name is **861275077962896**, which is represented by the **IMEI**.
681	681
	622	+{{info}}
	623	+The ThingsBoard uses the device's IMEI number included in the payload to create a device in the Devices section.
	624	+{{/info}}
	625	+
682	682	[[image:image-4.png]]
683	683
684	684

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