Getting different MAC address of the same device.

[HeavyShmel]

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I'm trying to make a dynamic whitelist on esp32.

To do it, I store the addresses of devices with which I had a connection in NVS. If esp32 have a reboot, it retrieve addresses from the NVS and add them to the Whitelist.

But I ran into a problem. The smartphone from which I connect to the device almost every time has a different MAC address. And I get the same problem with other smarphone. And I have never got a real MAC address of my smartphone on esp32. So what could be a reason?

I use this server callback in which I get an address of smartphone:

void ServerCallbacks::onConnect(NimBLEServer *pServer, ble_gap_conn_desc *desc) { NimBLEAddress tmp(desc->peer_ota_addr); if(!NimBLEDevice::onWhiteList(tmp)){ NimBLEDevice::whiteListAdd(tmp); addAddressToNVS(tmp); //my function in whitch i save an address } pAdvertising->stop(); }

[h2zero]

Phones use a random resolvable address. You would need to bond with the phone to be able to recognize it when the address changes and retrieve its static address.

[sanastasiou]

Sorry to reply to this very old thread, but I seem to have the exact same issue.

Although my device is bonding, how would I get the static address? According to https://github.com/h2zero/NimBLE-Arduino/blob/release/1.4/examples/NimBLE_Server_Whitelist/NimBLE_Server_Whitelist.ino

That would be desc->peer_ota_addr but that is not correct, since that address is always changing.

[h2zero]

the desc->peer_id_addr would be what is needed. But this has changed going forward.