cookbook • 流程控制• 触发间隔

定期触发流程

问题

您想要在固定的时间间隔触发一个流程。例如，定期调用一个 API 以检索其当前状态。

解决方案

使用配置为在所需间隔重复的 Inject 节点。

要停止 - 您必须重新配置该节点并将重复设置为无。点击完成以保存更改并部署。

示例

[{"id":"372cfc32.bcd244","type":"inject","z":"535331d8.55c1f","name":"","topic":"","payload":"","payloadType":"date","repeat":"5","crontab":"","once":false,"x":150,"y":600,"wires":[["6c63c499.ce3adc"]]},{"id":"6c63c499.ce3adc","type":"debug","z":"535331d8.55c1f","name":"","active":true,"console":"false","complete":"false","x":410,"y":600,"wires":[]}]

讨论

Inject 节点可以配置为以固定的间隔重复。如果需要，它还可以被限制在某些特定时间和特定日期之间进行重复。

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Node-RED: 用于事件驱动应用程序的低代码编程。