MyQ allows for a couple of things:
- Read current state of garage door (open or closed or opening or closing)
- Set state of garage door (open or close)
So with these option you don’t need any sensor on the garage door. What you’re referring to is Chamberlain complaining about folks who had modified Jason’s DH and were overpolling their server to read the states of the garage door (like every few seconds or minutes). So they threatened to kill off the API’s or block ST’s servers. Since then @brbeaird has developed an alternative version which does away with scheduled polling and instead relies to events to trigger a poll the Chamberlain server. This has significantly reduced the load on the server and things are dandy as of now. This device reports the state of the garage door in addition to allowing you to control it.
So you can use routines to control the garage door using the MyQ community integration and it should work just fine without any sensor.
Hope this answers your question.