Non Bluetooth/BLE Keyfob implementation

Question

Hello 
 
 I have a use case of typical 3 key (lock / unlock / alarm) car remote lock key fob implementation. Since I already have nRF82810 / 840 based hardware designs that can do this I wanted to check if there is any supporting firmware for this. 
 However, I dont want the communication / traffic to be visible to mobile or similar Bluetooth/BLE capable devices. Is this possible? We can use the 810 on the car side and a 810/840 on the key fob. 
 TIA.

Edvin · Accepted Answer

No. All devices are visible if someone is scanning for them. It is not possible to hide from that. 
 Now, I don't remember if you use directed advertising, that it is filtered out by the OS on the phone, so that you can't see it in nRF Connect for iOS/Android. But you are able to see it using e.g. nRF Connect for Desktop, or a BLE sniffer. 
 Because the packets are on the air, it is simply impossible to hide it 100%. 
 
 BR, 
 Edvin

Non Bluetooth/BLE Keyfob implementation

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