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How to Use a Garage Door Lock to Prevent Theft
R Rahan has an even more complicated mailbox set up. His doorbell is also based on an ESP8266 and he uses a DF player with a small SD card connected to it. He says criminals are normally not very intelligent so probably the attack vector is different than we anticipate. But getting the notification to your phone is especially need a fewer way back in the garden or in the basement where you don't hear the doorbell.