Direct advertising to any device

[Pureer]

Hello everyone.

There have a scenario, nrf52832 starts a direct advertising , but the dest ble device is not bonded(it could be any other central device), when the dest ble device receive the direct advertising it should initiate the connection to advertiser.

Can it work?

[Simon]

If the central device uses a Random Private Resolvable address, this is not possible, since the device advertising doesn't have the IRK. However, what is the goal of your project? Could you elaborate? Maybe whitelisting could solve your problems?

Best regards,

Simon

[Pureer]

**The central device is Android. Peripheral device is nrf52832.

**The nrf52832 will get any infomations about central device by other way(actually central will produce ultrasonic,nrf52 will decode it) .Becase there are so many nrf52 peripherals,and this way is more convenient than search manually.

**I want some of specific nrf52s can advertising to central,central will initiate connect,and I don't want central connect to other peripheral or peripheral be connected by other central.

**The specific nrf52s advertising can be hidden to other central is better.

Sorry ,my English is not good , I hope I have written clearly.

Can whitelisting do work with no bonding ?  Could you please tell me which api it is ?

[Simon]

Yes, it is possible for the central (Android device) to whitelist the peripheral (nRF52832) without bonding with it (See Hung's answer). You could use the BLE Heart Rate Collector Example as a guide for how to implement whitelisting.

Best regards,

Simon

[Pureer]

Simon，I think if the central device is Android device,to edit the whitelist manually also need the IRK.Am I right?

[Simon]

Yes, you need the IRK in order to convert the random address into the real address and identify the device.