sd_ble_gap_lesc_dhkey_reply's error on "ble_app_multirole_lesc"

RE: sd_ble_gap_lesc_dhkey_reply's error on "ble_app_multirole_lesc"

takashina hiroki — Tue, 11 Jun 2019 23:43:28 GMT

I have further questions in addition to the above.

The above log is a log when operating with the following device.
・ "Central": Google Pixel 3 (Android v9)

I worked with the following device experimentally.
・ "Central": SH-03G (Android v7.0)
In that case, "BLE_GAP_EVT_PASSKEY_DISPLAY" has occurred.
It did not occur when trying with "Google Pixel 3".
When operating with "ble_app_multirole_lesc (SDK V15.3.0)", "BLE_GAP_EVT_PASSKEY_DISPLAY" has occurred on both devices.
Therefore, I think that it is correct that this event occurs.
Why did we get this result by changing the device?
Please tell me.
The log at that time is shown below.

//////////////////////////////////////////////////////
<info> app: Initializing nrf_crypto.
<info> app: Initialized nrf_crypto.
<warning> nrf_sdh_ble: RAM starts at 0x20002C50, can be adjusted to 0x20002788.
<warning> nrf_sdh_ble: RAM size can be adjusted to 0xD878.
<info> app: Generating key-pair
<info> app: Converting to raw type
<info> app: Scanning
<info> app: Advertising
<info> app: LE Secure Connections example started.
<info> app: PERIPHERAL: Connected, handle 0.
<info> app: CENTRAL: BLE_GAP_EVT_SEC_PARAMS_REQUEST: bond=0x1, mitm=0x1, lesc=1, keypress=0x0, io_caps=0x4
<info> app: CENTRAL: BLE_GAP_EVT_SEC_PARAMS_REQUEST: oob=0x0, min_key_size=0x0, max_key_size=0x10, kdist_own=0x4F, kdist_peer=0xBF
<info> app: CENTRAL: BLE_GAP_EVT_LESC_DHKEY_REQUEST
<info> app: Calling sd_ble_gap_lesc_dhkey_reply on conn_handle: 0
<info> app: CENTRAL: BLE_GAP_EVT_PASSKEY_DISPLAY: passkey=174861 match_req=1
<info> app: Press Button 1 to confirm, Button 2 to reject
<info> app: Numeric Match. Conn handle: 0
<info> app: CENTRAL: BLE_GAP_EVT_AUTH_STATUS: error_src=0x0
<info> app: CENTRAL: BLE_GAP_EVT_AUTH_STATUS: status=0x8B bond=0x0 lv4: 0 kdist_own:0x0 kdist_peer:0x0
<info> app: PERIPHERAL: Disconnected, handle 0, reason 0x28.
//////////////////////////////////////////////////////

RE: sd_ble_gap_lesc_dhkey_reply's error on "ble_app_multirole_lesc"

takashina hiroki — Tue, 11 Jun 2019 06:38:22 GMT

I confirmed the content of "sd_ble_gap_lesc_dhkey_reply".
I modified it to be executed in the "BLE_GAP_EVT_LESC_DHKEY_REQUEST" event.
As a result, the error is gone.
Indicates the content of the correction.

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
case BLE_GAP_EVT_LESC_DHKEY_REQUEST:
    NRF_LOG_INFO ("% s: BLE_GAP_EVT_LESC_DHKEY_REQUEST", nrf_log_push (roles_str [role]));
    on_dhkey_request (conn_handle, & p_ble_evt-> evt.gap_evt.params.lesc_dhkey_request, role);
    service_dhkey_requests ();
    break;
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

But there is another problem.
"Central" issues a request with "BLE_GAP_IO_CAPS_KEYBOARD_DISPLAY".
Since "Peripheral" is "BLE_GAP_IO_CAPS_DISPLAY_YESNO", this request can not be accepted.
After that, "BLE_GAP_SEC_STATUS_AUTH_REQ (Authentication requirements not met.)" Has occurred.
As a result, pairing is not successful.
Indicates the log at the time of occurrence.

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
<info> app: Initializing nrf_crypto.
<info> app: Initialized nrf_crypto.
<warning> nrf_sdh_ble: RAM starts at 0x20002C50, can be adjusted to 0x20002788.
<warning> nrf_sdh_ble: RAM size can be adjusted to 0xD878.
<info> app: Generating key-pair
<info> app: Converting to raw type
<info> app: Scanning
<info> app: Advertising
<info> app: LE Secure Connections example started.
<info> app: PERIPHERAL: Connected, handle 0.
<info> app: CENTRAL: BLE_GAP_EVT_SEC_PARAMS_REQUEST
<info> app: CENTRAL: BLE_GAP_EVT_LESC_DHKEY_REQUEST
<info> app: Calling sd_ble_gap_lesc_dhkey_reply on conn_handle: 0
<info> app: CENTRAL: BLE_GAP_EVT_AUTH_STATUS: status = 0x83 bond = 0x0 lv4: 0 kdist_own: 0x0 kdist_peer: 0x0
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

Please tell me the cause.

RE: sd_ble_gap_lesc_dhkey_reply's error on "ble_app_multirole_lesc"

takashina hiroki — Mon, 10 Jun 2019 02:19:58 GMT

Indicates a log when an error occurs.

<info> app: Initializing nrf_crypto.
<info> app: Initialized nrf_crypto.
<warning> nrf_sdh_ble: RAM starts at 0x20002C50, can be adjusted to 0x20002788.
<warning> nrf_sdh_ble: RAM size can be adjusted to 0xD878.
<info> app: Generating key-pair
<info> app: Converting to raw type
<info> app: Scanning
<info> app: Advertising
<info> app: LE Secure Connections example started.
<info> app: PERIPHERAL: Connected, handle 0.
<info> app: CENTRAL: BLE_GAP_EVT_SEC_PARAMS_REQUEST
<info> app: CENTRAL: BLE_GAP_EVT_LESC_DHKEY_REQUEST
<info> app: CENTRAL: BLE_GAP_EVT_AUTH_STATUS: status = 0x83 bond = 0x0 lv4: 0 kdist_own: 0x0 kdist_peer: 0x0
<info> app: Calling sd_ble_gap_lesc_dhkey_reply on conn_handle: 0
<error> app: ERROR 8 [NRF_ERROR_INVALID_STATE] at C: \ *** \ nRF5_SDK_14.2.0_17b948a \ examples \ ble_central_and_peripheral \ experimental \ ble_app_multirole_lesc \ main.c: 1437

RE: sd_ble_gap_lesc_dhkey_reply's error on "ble_app_multirole_lesc"

takashina hiroki — Mon, 10 Jun 2019 02:17:02 GMT

I tried using two boards.
In that case, no abnormality occurs and it works normally.
An error occurs only when I try with my smartphone.

RE: sd_ble_gap_lesc_dhkey_reply's error on "ble_app_multirole_lesc"

takashina hiroki — Mon, 10 Jun 2019 00:33:49 GMT

I tried it with Google Pixel 3 (Bluetooth v5.0), but the same error occurred.
I understand that it is compatible with the old version.
Please tell me the cause.

RE: sd_ble_gap_lesc_dhkey_reply's error on "ble_app_multirole_lesc"

takashina hiroki — Mon, 10 Jun 2019 00:26:08 GMT

Thank you for answer.

I did not confirm that.
Thank you for teaching me.

I will try it.

RE: sd_ble_gap_lesc_dhkey_reply's error on "ble_app_multirole_lesc"

Jared — Fri, 07 Jun 2019 12:06:51 GMT

Hi,

I don't think the iPhone 5s support LESC as it came in Bluetooth 4.2 and iPhone 5s supports Bluetooth 4.0. You can confirm this by using nRF Connect as a central instead, and see if it works.

Best regards

Jared