BLE pairing protocol allways ends up with SEC_STATUS_UNSPECIFIED

[afpineda]

No matter how you configure the SecurityManager, the pairing protocol ends up with "SEC_STATUS_UNSPECIFIED" (0x88) at the "pairingResult" event, in the peripheral's side (Mbed API). On the central's side, it ends up with a timeout.

Board: Arduino Nano 33 BLE. Tested both in Android (nRF app) and Windows 10 (with BT 5.0 radio). Core version: tested both 2.6.1 and current master branch (downloaded FEATURE_BLE and BLE driver folders, only)

Pairing is mandatory in Windows 10 API in order to retrieve services and characteristics, so this is a blocking issue.

This is the involved code (not the full code):

        // Stack initialization
        BLE& ble = BLE::Instance();
        ble_error_t error = ble.init();
        ERRORCHECK(error,nullptr);
        while (!ble.hasInitialized()) 
            ble.processEvents();
        // Security Manager initialization
        error = ble.securityManager().init(
            /* enableBonding */ true,
            /* requireMITM */ false,
            /* iocaps */ SecurityManager::IO_CAPS_NONE,
            /* passkey */ nullptr,
            /* signing */ false,
            /* dbFilepath */ nullptr);
        ERRORCHECK(error,nullptr);
        error = ble.securityManager().setPairingRequestAuthorisation(true);
        ERRORCHECK(error,nullptr);
        error = ble.securityManager().allowLegacyPairing(true);
        ERRORCHECK(error,nullptr);

        // GAP initialization
        error = ble.gap().enablePrivacy(false);
        ERRORCHECK(error,nullptr);
        error = DeviceInformationService::add_service(ble,
            BLE_MANUFACTURER,
            BLE_DEVICE_NAME,
            nullptr, // Serial number
            BLE_HW_REV,
            BLE_FW_REV
        );
       ERRORCHECK(error,nullptr);
       ...

and the event handler:

void pairingRequest (ble::connection_handle_t connectionHandle)
{
    Serial.println("PAIRING REQUEST");
    BLE& ble = BLE::Instance();
    ble_error_t error;
    error = ble.securityManager().acceptPairingRequest(connectionHandle);
    if (error) {
        Serial.print("acceptPairingRequest failed with code ");
        Serial.println(error);
    }
}

void pairingResult (
    ble::connection_handle_t connectionHandle, 
    ble::SecurityManager::SecurityCompletionStatus_t result)
{
    Serial.println("PAIRING RESULT");
    Serial.println(result);
    if (result== ble::SecurityManager::SecurityCompletionStatus_t::SEC_STATUS_SUCCESS) {

    } else {
        start_advertising();
    }
}

[haroonalisa]

Can anyone mention if this has been fixed or is there a workaround?

[ufocia]

I'm having a similar problem. Superficially looks like this.