I am using a Raspberry Pi 3 as well as the Web dashboard.
When scheduling an event I cannot turn on an LED. When selecting the device LED, the only action options are reboot and Shutdown.(as shown in screenshot1). When selecting another device option such as reboot, the actions I have are Turn off and turn on.(As shown in screenshot 2) When selecting the LED and selecting either reboot or turn off it gives me an error message when saving. Probably because the action is incompatible with the type of Device. However even though it gave me an error message,(shown in screenshot 3) the event showed up in my calendar and ran. It sent me a text and email but did not do anything else.