Bluetooth Long Range and encryption

RE: Bluetooth Long Range and encryption

Vidar Berg — Mon, 02 Nov 2020 13:29:27 GMT

No problem, thanks for the update!

RE: Bluetooth Long Range and encryption

Grzegorz Blach — Mon, 02 Nov 2020 13:15:07 GMT

It works! Thank you very much!

RE: Bluetooth Long Range and encryption

Vidar Berg — Thu, 29 Oct 2020 13:11:04 GMT

I forgot that the LBS sample was configured to support passkey pairing/bonding by default. The BT_SECURITY_ERR_AUTH_FAIL error is probably a result of the central not inserting the passkey displayed by the peripheral. Unless you have you implemented support for passkey entry? Anyway, it's easier implement support for "just works" which does not require any user input.

I tested "just works" bonding now by modifiying the hr_coded samples available in NCS SDK (tested with v1.4.0-rc2), and it worked.

hr coded central+peripheral with bonding

devzone.nordicsemi.com/.../0245.coded_5F00_phy_5F00_and_5F00_bonding.zip

RE: Bluetooth Long Range and encryption

Grzegorz Blach — Wed, 28 Oct 2020 18:11:07 GMT

Today I spent some time and played with bt_conn_auth_cb callbacks, but with no success. bt_conn_auth_pairing_confirm() in pairing_confirm() return 0 (no error), but then pairing_failed() reports bt_security_err = 1 (BT_SECURITY_ERR_AUTH_FAIL) and security_changed() reports the same error.

RE: Bluetooth Long Range and encryption

Vidar Berg — Fri, 23 Oct 2020 15:26:20 GMT

Thanks for making the code available . It seems like you have forgotten to integrate pairing support in your main. I suggest you take a look at the Bluetooth LBS sample to see what callbacks are added when the CONFIG_BT_LBS_SECURITY_ENABLED option is enabled.

Ref.

https://github.com/nrfconnect/sdk-nrf/blob/master/samples/bluetooth/peripheral_lbs/src/main.c

RE: Bluetooth Long Range and encryption

Grzegorz Blach — Thu, 22 Oct 2020 17:40:23 GMT

I've published a stripped down versions of my programs at https://github.com/gblach/bluetooth_demos

In both programs I've enabled logging via USB serial. Demo_central program reports err == 5 (BT_ATT_ERR_AUTHENTICATION) in demo_central/src/main.c:33

This programs works correctly in two situations:

1) When I change BT_GATT_PERM_READ_ENCRYPT to BT_GATT_PERM_READ in demo_peripherial/src/main.c:41

2) When I keep encryption enabled, but disable long range mode and extended advertising by commenting out two lines: demo_peripherial/src/main.c:10 and demo_peripherial/prj.conf:9

RE: Bluetooth Long Range and encryption

Vidar Berg — Wed, 21 Oct 2020 11:48:52 GMT

Hi,

Encryption should be supported. Do you have any logging enabled to see if it reports any errors? Also, how is it not working, is it that it can't establish a connection?

Best regards,

Vidar