There is a deadbolt on the market that you can unlock with your iPhone through Bluetooth. Unfortunately I have android with an older version of Bluetooth that will not work with the new lock. I would like to build my own. I'm able to unlock and lock my door with two relays wired to my Arduino and to input pins as pushbuttons I have a combination electric deadbolt that I have wired up. My question is is there way to use Bluetooth and an external antenna at the front door so when my Bluetooth enabled cell phone comes near the antenna a relay will be activated which unlocks my door. I am hoping that my Bluetooth enabled cell phone can automatically connect to the Arduino Bluetooth.
Anyone have any suggestions or thoughts on this thanks
I think it should be possible with an HC-05. I assume we are not talking about an Android app here. This is just the phone, and works similarly to the auto-connect in the car. I guess the difference is that, in the car, Bluetooth sniffs for the phone when you turn on the ignition, but here, Bluetooth has power all the time and is permanently sniffing.
You might get something here.
There could be a problem if the phone is already connected to something else.
on the end of the module is that the antenna i presume i would have to put that near the front door rather than in my basement where the arduino is
The antenna goes wherever it can get a signal from the phone, which is not likely to be in the basement. This is probably not too hard. Bluetooth is a simple serial device and thus can probably stand a fair length of cable.