Node-RED中使用range范围节点实现从一个范围对应至另一个范围

约定不等于承诺〃 2023-09-30 13:04 1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range范围节点可以将值从一个范围对应另一个范围。

比如将值从0-1023对应输出成0-255

![b266d6f082678cb2313fed868851bee1.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]  
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## 实现 ##

1、range节点的编辑

![d15353d3d8088e890b6daa4aa60f0a5b.png][]

2、json数据

[{"id":"8286efb9.83b27","type":"inject","z":"34d4d5aa.c0d0ea","name":"","repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"0","payloadType":"num","x":210,"y":300,"wires":[["6fa78e43.150d3"]]},{"id":"cdc22ced.16646","type":"inject","z":"34d4d5aa.c0d0ea","name":"","repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"512","payloadType":"num","x":210,"y":360,"wires":[["6fa78e43.150d3"]]},{"id":"8327df99.434ed","type":"inject","z":"34d4d5aa.c0d0ea","name":"","repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"1023","payloadType":"num","x":210,"y":420,"wires":[["6fa78e43.150d3"]]},{"id":"6fa78e43.150d3","type":"range","z":"34d4d5aa.c0d0ea","minin":"0","maxin":"1023","minout":"0","maxout":"255","action":"scale","round":true,"property":"payload","name":"Map","x":410,"y":360,"wires":[["6339d720.10a758"]]},{"id":"6339d720.10a758","type":"debug","z":"34d4d5aa.c0d0ea","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":570,"y":360,"wires":[]}]

[Node-RED_Windows_-CSDN]: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/121884766
[b266d6f082678cb2313fed868851bee1.gif]: https://img-blog.csdnimg.cn/img_convert/b266d6f082678cb2313fed868851bee1.gif
[CSDN_-C_SpringBoot]: https://blog.csdn.net/badao_liumang_qizhi
[d15353d3d8088e890b6daa4aa60f0a5b.png]: https://img-blog.csdnimg.cn/img_convert/d15353d3d8088e890b6daa4aa60f0a5b.png