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I had the same problem about a year ago, then I just bought this and swapped out my existing wall switch. Beeps a warning and autocloses after a minute.

http://www.amazon.com/LiftMaster-888LM-Security-Upgrades-Pre...

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Problem with IoT devices like LiftMster is that they rely on the same 'rolling code' technology (see 'Programming' https://www.liftmaster.com/CatalogResourcesV3/en-us/shared/f...) to give the connected device (internet) access to open/close the door. This is long proven to be very insecure: http://www.wired.com/2015/08/hackers-tiny-device-unlocks-car...

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