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67	67	[[image:mqtt-command-1.png||height="228" width="700"]]
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70		-If the command is successful, you can see the telemetry data you sent under the **Latest telemetry** section.
	70	+If the command is successful, you can see the telemetry data you sent under the **Latest telemetry** section. Note that the **State** is now **'Active'** in the **Latest telemetry** section.
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73	73	[[image:new-device-telemetry-test.png||height="520" width="500"]]
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81	81	[[image:mqtt-command-2.png||height="227" width="700"]]
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	84	+
	85	+[[image:virtual-device-active.png]]
	86	+
	87	+
84	84	= Data Converters =
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86	86	In **ThingsBoard**, **Data Converters** are components used to transform incoming or outgoing data between different formats, typically to convert raw telemetry data from devices into a structured format that ThingsBoard can understand, or vice versa.
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383	383	= Verifying the receipt of data from the device =
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385		-Connect **S31B-NB** to transfer information. If the integration was performed without errors, after the transmission of the first telemetry, a new device with the name “xxxxx” 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.
	389	+On the terminal, issue the following MQTT command which simulates the device S31B-NB.
	390	+
	391	+
	392	+{{code language="none"}}
	393	+mosquitto_pub -d -q 1 -h mqtt.eu.thingsboard.cloud -p 1883 -t v1/devices/S31B-NB/telemetry -u "24vk3w9h7sqdld1me5eh" -m "{temperature:20}"
	394	+{{/code}}
	395	+
	396	+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.