数据无法通过MQTT从Node-RED传输到Thingsboard。

要将数据从Node-RED传输到Thingsboard，您可以使用Node-RED提供的mqtt输出节点和Thingsboard提供的mqtt输入节点。以下是一个示例解决方案：

首先，确保您在Node-RED中安装了mqtt输出节点和Thingsboard中的mqtt输入节点。

然后，使用以下代码示例将数据从Node-RED传输到Thingsboard：

[{"id":"9e1f5b3f.dc1b5","type":"mqtt out","z":"b20c6623.8e1b1","name":"","topic":"v1/devices/me/telemetry","qos":"","retain":"","broker":"23c9ea40.0e7f78","x":400,"y":240,"wires":[]},{"id":"d4e2b3a3.2d7658","type":"inject","z":"b20c6623.8e1b1","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payloadType":"date","x":190,"y":240,"wires":[["9e1f5b3f.dc1b5"]]},{"id":"23c9ea40.0e7f78","type":"mqtt-broker","name":"","broker":"localhost","port":"1883","clientid":"","usetls":false,"compatmode":true,"keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","closeTopic":"","closeQos":"0","closePayload":"","willTopic":"","willQos":"0","willPayload":""}]

在这个示例中，我们使用了一个注入节点，它会在连接到mqtt输出节点之前生成一个时间戳作为数据。mqtt输出节点将数据发布到Thingsboard的mqtt输入节点，并将其发送到“v1/devices/me/telemetry”主题。您可以根据自己的需求更改主题名称。

确保将localhost和端口1883更改为您Thingsboard实例的mqtt代理地址和端口。

保存并部署该流程后，数据将通过mqtt从Node-RED传输到Thingsboard。您可以在Thingsboard上查看和处理传输的数据。