我在控制Arduino的Raspberry Pi上运行Node-Red。连接到Arduino的是Sansmart 16继电器板。
在我的流程中，在仪表板开关中，＆＃34; On＆＃34;有效载荷是＆＃34;假＆＃34;和＆＃34;关＆＃34;有效负载是＆＃34; True＆＃34; （如果我反转有效载荷，则继电器转动＆＃34;开启＆＃34;当开关关闭时）。
除非部署更改或重新启动系统，否则一切正常。所有继电器都打开并保持开启状态，但是如果我转到仪表板并循环开关（然后关闭），继电器将保持关闭状态直到开启状态，并且一切正常。
任何人都知道为什么初始状态是＆＃34; On＆＃34;。有没有办法在启动时循环开关（继电器）？
谢谢。
以下是流程：
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答案 0 :(得分：0)
仪表板ui开关在启动或重新部署时不会发送具有初始状态的消息。
如果要在启动时发送消息，则应使用具有适当设置的注入节点