Connect secure and save System Attributes

RE: Connect secure and save System Attributes

Amanda Hsieh — Tue, 16 Jan 2024 17:35:54 GMT

Hi,

[quote user="Chaoyue Ying"]I try the way that call pm_conn_sec_params_reply(),but it do nothing.[/quote]

You can check what is returned by pm_conn_sec_params_reply. If no reply is sent, the parameters given in pm_sec_params_set are used. See the PM_EVT_CONN_SEC_PARAMS_REQ event description.

I would recommend looking at ble_app_bms or ble_app_gls . If they cannot help, please create a new support case for the new issue away from the original scope.

-Amanda H.

RE: Connect secure and save System Attributes

Chaoyue Ying — Tue, 16 Jan 2024 06:40:03 GMT

Hi,

A new problem has arisen here.When I paring and bonding with central(Mobile phones made by different manufacturers) one by one,pm_evt_handler() will get several identical events in a row that PM_EVT_CONN_SEC_PARAMS_REQ.

It seem lag happened in peer_manager,I try the way that call pm_conn_sec_params_reply(),but it do nothing.

        case PM_EVT_CONN_SEC_PARAMS_REQ:
        {
				  ble_gap_sec_params_t sec_param;
					memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));

					sec_param.bond           = SEC_PARAM_BOND;
					sec_param.mitm           = SEC_PARAM_MITM;
					sec_param.lesc           = SEC_PARAM_LESC;
					sec_param.keypress       = SEC_PARAM_KEYPRESS;
					sec_param.io_caps        = SEC_PARAM_IO_CAPABILITIES;
					sec_param.oob            = SEC_PARAM_OOB;
					sec_param.min_key_size   = SEC_PARAM_MIN_KEY_SIZE;
					sec_param.max_key_size   = SEC_PARAM_MAX_KEY_SIZE;
					sec_param.kdist_own.enc  = 1;
					sec_param.kdist_own.id   = 1;
					sec_param.kdist_peer.enc = 1;
					sec_param.kdist_peer.id  = 1;
          pm_conn_sec_params_reply(p_evt->conn_handle, &sec_param,NULL);
        } break;

The phone shows pairing until the pop-up pairing failed.What should I do?

RE: Connect secure and save System Attributes

Amanda Hsieh — Fri, 12 Jan 2024 20:32:32 GMT

You can take a look at the _conn_secure() in the nRF5_SDK\components\ble\peer_manager\peer_manager_handler.c on how to do that.

RE: Connect secure and save System Attributes

Chaoyue Ying — Thu, 11 Jan 2024 15:39:21 GMT

你好

我想知道我应该怎么做才能添加检查以确保设备已“准备就绪”

RE: Connect secure and save System Attributes

Amanda Hsieh — Thu, 11 Jan 2024 15:01:22 GMT

Hi,

If the devices aren't disconnected it's likely due to the devices being in a security procedure already, so you could add a check to make sure that the devices are "ready" or add a delay before calling pm_conn_secure().

[quote user="Chaoyue Ying"]I want to know a central is bonded or the bond queue is vacant at the process of peripheral.If peripheral can to learn the bond queue is NULL,then call pm_conn_secure() maybe avoid NRF_ERROR_BUSY.[/quote]

From the peripheral side, the phone is still bonded, but the phone doesn't have the bond data anymore.

-Amanda H.

RE: Connect secure and save System Attributes

Chaoyue Ying — Thu, 11 Jan 2024 07:58:29 GMT

Hi,

I hope to know what should I do to avoid NRF_ERROR_BUSY when I try to rebind my phone and nrf52832 after the peripheral call pm_conn_secure().

I can find that NRF_ERROR_BUSY means a security procedure is already in progress on the link, or if the link is disconnecting or disconnected.But I can not understand, because I can observed connecting and pairing while RTT output NRF_ERROR_BUSY.And disconnect not appear in RTT output.

Besides,I think the config of PM_EVT_CONN_SEC_CONFIG_REQ is support rebind.

I want to know a central is bonded or the bond queue is vacant at the process of peripheral.If peripheral can to learn the bond queue is NULL,then call pm_conn_secure() maybe avoid NRF_ERROR_BUSY.

RE: Connect secure and save System Attributes

Amanda Hsieh — Wed, 10 Jan 2024 17:57:48 GMT

Hi,

[quote user=""]I first used my phone to perform a pairing and binding, and then deleted the binding information on my phone.Then I try to connect and bond with my board again,it will return NRF_ERROR_BUSY while using pm_conn_secure().[/quote]

It should also delete the bond information on the device if you delete the binding information on my phone, and then reconnect. Returning NRF_ERROR_BUSY from pm_conn_secure() means if a security procedure is already in progress on the link, or if the link is disconnecting or disconnected.

[quote user=""]While the central lose the bonding information,the program will run as below:[/quote]

That would allow pairing requests from an already bonded peer.

[quote user=""]how I to know a central is bonded or the bond queue is vacant.[/quote]

If the central device is your smartphone, you could use the nRF Connect app and check the bond tab.

[quote user=""]Then while the board send informations to phone,ble_nus_data_send() always return BLE_ERROR_GATTS_SYS_ATTR_MISSING.[/quote]

See my colleague's explanation in this post.

Regards,
Amanda H.