Hello Alefur
Show control offers a number of ways to trigger actions.
One of them is using raw UDP messages.
The units listen to incoming UDP messages and reads the content, which can be used to trigger something in show control.
However I do not know a way to send a raw UDP message from javascript.
But many servers are capable of sending raw UDP messages.
If you click learn and then send a message the unit should save whatever it received.
Best regards,
Guido