Node-RED中change更改节点与switch分支节点的使用

╰+攻爆jí腚メ 2023-09-30 13:04 14阅读 0赞

## 场景 ##

Node-RED简介与Windows上安装、启动和运行示例：

[Node-RED简介与Windows上安装、启动和运行示例\_霸道流氓气质的博客-CSDN博客][Node-RED_Windows_-CSDN]

Node-RED的switch节点就是条件判断，可以依据条件来传递msg物件至不同的下一个节点。

例如：inject注入0和1，使用switch和change节点来分别输出成ON和OFF

![3fc8c4ddccbbb91fcae02eaa6fe703c6.gif][]

注：

博客：  
[霸道流氓气质的博客\_CSDN博客-C\#,架构之路,SpringBoot领域博主][CSDN_-C_SpringBoot]  
关注公众号  
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## 实现 ##

1、switch节点编辑

![a64c79adc70522ae54de7116eadb1eef.png][]

2、change节点编辑

![757e1e25827c9bebc164e73dd997e820.png][]

3、流程转换的json数据

[{"id":"6ef823fa.ff781c","type":"inject","z":"34d4d5aa.c0d0ea","name":"","repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"0","payloadType":"str","x":170,"y":80,"wires":[["45345f77.71a5f"]]},{"id":"90976eb6.0bc82","type":"inject","z":"34d4d5aa.c0d0ea","name":"","repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"1","payloadType":"str","x":170,"y":180,"wires":[["45345f77.71a5f"]]},{"id":"45345f77.71a5f","type":"switch","z":"34d4d5aa.c0d0ea","name":"On or OFF","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"0","vt":"str"},{"t":"eq","v":"1","vt":"str"}],"checkall":"true","repair":false,"outputs":2,"x":350,"y":140,"wires":[["60b9f22a.9acb4c"],["8e48a261.b465e"]]},{"id":"aa1452ff.c3ffa","type":"debug","z":"34d4d5aa.c0d0ea","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":730,"y":80,"wires":[]},{"id":"de505863.01f448","type":"debug","z":"34d4d5aa.c0d0ea","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":710,"y":200,"wires":[]},{"id":"60b9f22a.9acb4c","type":"change","z":"34d4d5aa.c0d0ea","name":"Set to ON","rules":[{"t":"set","p":"payload","pt":"msg","to":"ON","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":520,"y":100,"wires":[["aa1452ff.c3ffa"]]},{"id":"8e48a261.b465e","type":"change","z":"34d4d5aa.c0d0ea","name":"Set to OFF","rules":[{"t":"set","p":"payload","pt":"msg","to":"OFF","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":510,"y":200,"wires":[["de505863.01f448"]]}]

[Node-RED_Windows_-CSDN]: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/121884766
[3fc8c4ddccbbb91fcae02eaa6fe703c6.gif]: https://img-blog.csdnimg.cn/img_convert/3fc8c4ddccbbb91fcae02eaa6fe703c6.gif
[CSDN_-C_SpringBoot]: https://blog.csdn.net/badao_liumang_qizhi
[a64c79adc70522ae54de7116eadb1eef.png]: https://img-blog.csdnimg.cn/img_convert/a64c79adc70522ae54de7116eadb1eef.png
[757e1e25827c9bebc164e73dd997e820.png]: https://img-blog.csdnimg.cn/img_convert/757e1e25827c9bebc164e73dd997e820.png