I am planning to build a hidden safe with no handle or number pad. Therefore I need a possibility to enter the access code wireless, best case via smartphone. I know that probably the easiest way would be to use Bluetooth, but I would like to make it more secure by using NFC. So my plan is, to place my smartphone on a specific spot on the wall so that the devices start pairing. Then it should be possible to enter an access code, like on an standard safe.
Does anybody have an idea if it is possible to use NFC for that purpose (and best case also know an existing Application for Android)?
Would be glad for ANY good ideas or alternatives.
Thx! Best regards! David