Hi guys this is my first post to the forums but I am familiar with the Arduino and programming.
Goal:
So I am doing my senior project as a computer engineer and I am programming an Uno to activate a servo with rotates a metal bracket that rotates and moves a door's deadbolt to "lock" and "unlock".
Thoughts:
I dont want to modify the door by drilling anything. The servo and arduino will be housed in plastic cases that can be double sided taped to a door for easy mounting and unmounting. The servo will just sit over the deadbolt and rotate back and forth. I have already coded it to unlock and lock with a push button and it works fine.
Need help:
Ok so I want to unlock the deadbolt from outside the house. I wanted to use RF like on your cars remote since some have a trunk unlock or AUX that aren't doing anything. I have come to find that they are really encrypted and probably won't work. Now I am thinking a garage door opener, I have 3 buttons with 2 being unused. Can I buy a cheap 434mhz RF receiver and scan to get the code off my garage opener?
I also thought about NFC and seeed makes an NFC shield with an external antenna but I am scared that the NFC range won't go through the door.
I am thinking that my fall back plan is Bluetooth but dont want to make a phone app or go down that path.
Lastly I could buy a relay shield with a matching remote and do it that way but that really doesn't involve anything unique so it would be hard to pass off for a senior project.
I can post pics if needed and always thanks for any/all help