Pairing timeout: setting timeout when initiating pairing

[Youssif]

Hi

We'd like to set the pairing timeout when using the function sd_ble_gap_authenticate(conn_handle, p_sec_params). The reason for this is that we are setting the connection interval to 4 seconds between two nrf52 devices, and whenever we try to establish pairing, it fails with BLE_GAP_SEC_STATUS_TIMEOUT. Is this possible and if so, what is the function/parameter that should be used/changed.

We are using nrf52 with softdevice S132 v3.0.0.

Thanks

[run_ar]

I'm afraid you cannot change this timeout, as the 30 second timer is dictated by the bluetooth core spec.

I would recommend that you wait until after you complete the pairing procedure before you update the connection parameters to 4 second intervals.

[Youssif]

Thank you for your response. I have just checked and found this information in the Bluetooth Specification, Version 5.0, Vol 3, Part H, Section 3.4 - SMP Timeout.