Could the BLE chip be only visible/communicate with a specific/particular smartphone app? How?

[Abomin3v3l]

Hi.

For example, for the nRF52832 BLE chip, could it, in some manner, be only visible/communicate with a specific/particular smartphone app? How? using the MAC?

Regards.

[Simonr]

Hi

Not if you want the nRF52 to advertise, an advertising device will be visible to all central devices scanning on the BLE channels, but you could make it so that it will disconnect unless a central with the correct services/security measures connects to it, thus it will only communicate with those specific scanning devices.

Another way could be to use the nRF52 device as the central device, that scans for BLE devices, and only connects to devices advertising a specific UUID, name or service. Then the phone application could advertise with those parameters and be connected to the nRF52 whenever enabled. This would ensure that no other devices connected/communicated with the nRF52 at least, but it would likely be a bit more power consuming than the other solution.

Here is a guide on how advertising is done in BLE.

Best regards,

Simon