I'd like to use an ESP32 with Arduino to lock/unlock a door depending on the presence of a cellphone with bluetooth activated.
I do not need to send data between both devices.
I tried some examples, BLE server in the ESP32 and a Xamarin app in Android and they share data and so on, but actually it's not what I'm looking for.
I guess the approach I should have to follow is to develop a service for android and iphone running in the background to look for bluetooth devices and when found the ESP32, share data and then the ESP32 should open the door. However, I think it's a bit hard approach as I'm not a cellphone developer.
Do you know an easier approach? I prefer to work more on Arduino than rather on the cellphone...