sd_ble_gap_lesc_dhkey_reply's error on "ble_app_multirole_lesc"

[takashina hiroki]

I have a question about the sample project "ble_app_multirole_lesc(SDK V14.2.0)".

・ "Central": iPhone 5s (iOS V11.2.2)
・ "Peripheral": nRF52832(SDK V14.2.0, S132 V5.0.0)

When connecting both, "BLE_GAP_EVT_LESC_DHKEY_REQUEST" has occurred.
After that, when "sd_ble_gap_lesc_dhkey_reply" is executed, the "NRF_ERROR_INVALID_STATE" error occurs.
Please tell me about the cause.

[Jared]

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 

[takashina hiroki]

Thank you for answer.

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

I will try it.

[takashina hiroki]

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.

[takashina hiroki]

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.

[takashina hiroki]

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