Can I use TimeMachine only when on wired connection? I have a server to which I am backing up a single MacBook Pro running Mountain Lion, via TimeMachine.

I would like to only back up when the MacBook Pro has a wired connection to the network. The wired and wireless connections are to the same router and all devices are on the same subnet.

How can I configure my Mac so that it will not start the TimeMachine backup process when operating wirelessly, but will allow backups when connected via wired connection?

The only idea I have had is manually disable TimeMachine when operating wirelessly. I see the TimeMachine has an option to not back up when on battery power, but it is possible that the laptop is plugged in to power, but not to wired ethernet.
I use this: https://www.macupdate.com/app/mac/26341/timemachinescheduler

Solved all of my TM and corrupt sparse bundle issues (backing up to a Synology NAS)