Normally, when your device is successfully connected to the network, you can also use physical switches to control your device. After the device is manually turned off and then on again with the physical switch, the device is automatically networked again.
If it is offline after turnning off manually, it is recommended that you remove the device and add it again.
If you cannot control your device with a physical switch, it is recommended that you power off the device for a while and then power it on again. Then try to control it with a physical switch again.