Thanks for your reply. I never get this event "ESP_GAP_BLE_SEC_REQ_EVT". I tried with both ESP_IO_CAP_OUT and ESP_IO_CAP_NONE. The event never fired when I paired and bonded. I'm using auth_req = ESP_LE_AUTH_REQ_SC_BOND Is there something else to try? Or is there something else that needs to be set ...

Hello, What is the correct way to enter pairing mode on an ESP32 peripheral device with only a single button? I want the device to allow pairing and bonding after a button press. Then, after the device reboots only a previous paired/bonded device will be allowed to connect. I have seen this question...

I see the same behavior on Android Pixel phone. Any suggestion or approach to fix?