如何处理传入的 TCP 消息并在 Node-RED 中发送响应？
[英]How to handle incoming TCP message and send a response in Node-RED?
问题描述
Using Node-RED TCP socket nodes, is there any way to handle incoming messages when the flow is acting as a TCP socket server (TCP out) that sends data to connected clients?
使用 Node-RED TCP 套接字节点，当流充当向连接的客户端发送数据的 TCP 套接字服务器（TCP 输出）时，有什么方法可以处理传入的消息？
The idea is to allow a "is alive?"这个想法是让一个“还活着？” method.方法。
1 个解决方案
解决方案1
0 2022-07-13 21:57:47
The TCP-out node can be set to "Reply" mode which when linked to a TCP-in node in "Server" mode will accept incoming connections and allow you to reply. TCP-out 节点可以设置为“Reply”模式，当链接到“Server”模式下的 TCP-in 节点时，它将接受传入连接并允许您回复。
The following example just echo's the input back to the client.以下示例只是将输入回显给客户端。
[{"id":"ef432e3f1a0f275e","type":"tcp in","z":"cc3f50ef2f39f8d0","name":"","server":"server","host":"","port":"8889","datamode":"stream","datatype":"utf8","newline":"\\n","topic":"","base64":false,"tls":"","x":270,"y":160,"wires":[["825896b40c7c96b9","d24c5bbd4d73d2af"]]},{"id":"825896b40c7c96b9","type":"debug","z":"cc3f50ef2f39f8d0","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":410,"y":200,"wires":[]},{"id":"d24c5bbd4d73d2af","type":"tcp out","z":"cc3f50ef2f39f8d0","name":"","host":"","port":"","beserver":"reply","base64":false,"end":false,"tls":"","x":530,"y":160,"wires":[]}]
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