PeerManager error (error: 4352)

[takashina hiroki]

I have a question about PeerManager.

When I tried bonding using PeerManager, the following error occurred.
Please tell me the cause.

<info> peer_manager_handler: Connection security failed: role: Central, conn_handle: 0x0, procedure: Bonding, error: 4352
<warning> peer_manager_handler: Disconnecting conn_handle 0.

[Jørgen Holmefjord]

Hi,

Which SDK version and example are you using? What device are you using for testing bonding against? Decimal 4352 is 0x1100. I find the following defines and reasoning for this error in peer_manager_types.h:

#define PM_CONN_SEC_ERROR_BASE 0x1000  /**< @brief The base for Peer Manager defined errors. See @ref PM_SEC_ERRORS and @ref pm_sec_error_code_t. */
#define PM_CONN_SEC_ERROR_DISCONNECT         (PM_CONN_SEC_ERROR_BASE + 0x100) /**< @brief Pairing or encryption did not finish before the link disconnected for an unrelated reason. */

So it looks like the device disconnects before the pairing or encryption procedure completed.

Best regards,
Jørgen

[takashina hiroki]

Thank you for answering.

SDK: 15.3.0
example: ble_app_multirole_lesc (I changed the source from the sample)
device: EYSHJNZWZ (nRF52832)

[takashina hiroki]

It may or may not occur under the same conditions.
(Reset every time to make same condition)
What causes the device to disconnect?

[Jørgen Holmefjord]

Can you provide the full log output from the failing device? If you could set NRF_LOG_DEFAULT_LEVEL to 4 in your sdk_config.h file, that should provide more details.

What device are you testing against?

Can you provide a sniffer trace between the two devices when trying to perform bonding? You can use nRFSniffer v2 for that.

[takashina hiroki]

The cause is unknown but the same phenomenon no longer occurs.
Therefore, we can not provide logs.
I will provide the log when it happens again.

The device used for the test is Android (Bluetooth v5.0).

I do not have nRF Sniffer.
Therere, sniffer trace can not be performed.

[takashina hiroki]

Is there any other way to identify the cause?
Also, I fear that this will happen at unintended timings.
Please let me know if there is a way to deal with it.