Reconnecting bonded device using SDK15.2/SD6.1.0 sometimes fails with x0085 pairing not supported.

RE: Reconnecting bonded device using SDK15.2/SD6.1.0 sometimes fails with x0085 pairing not supported.

Simonr — Thu, 20 Feb 2020 08:49:22 GMT

Hi Mark

Okay, then I think that's the reason why you're not able to reconnect/re-pair with your device. You'll either have to enable re-pairing or delete the bonding information on both devices when they're disconnected like this.

Best regards,

Simon

NOTE: I see that I forgot to add the link to the case explaining this yesterday. I have updated my previous reply to include the link now, and I apologize for not doing so yesterday.

Best regards,

Simon

RE: Reconnecting bonded device using SDK15.2/SD6.1.0 sometimes fails with x0085 pairing not supported.

Mark P. Mendelsohn — Wed, 19 Feb 2020 17:09:18 GMT

We do not allow repairing because it is considered a security violation.

RE: Reconnecting bonded device using SDK15.2/SD6.1.0 sometimes fails with x0085 pairing not supported.

Simonr — Wed, 19 Feb 2020 09:16:03 GMT

Have you set allow_repairing to true in the pm_conn_sec_config_t? If not, you'll have to, as the peer manager does not allow re-pairing by default. Please check out this case for a more thorough explanation of the matter.

Best regards,

Simon

RE: Reconnecting bonded device using SDK15.2/SD6.1.0 sometimes fails with x0085 pairing not supported.

Mark P. Mendelsohn — Tue, 18 Feb 2020 18:49:35 GMT

devzone.nordicsemi.com/.../tp144_5F00_005_5F00_sdk15v4.log

Adding printing of the data received in the PM_EVT_CONN_SEC_PARAMS_REQ and the data sent in the response.

Looks the same as when the secure connection was initially established.

51 0> before bond 1 mitm 0 lesec 1 keypress 0 io_caps 3 oob 0 min_key_size 0 max key size 16
52 0> after bond 1 mitm 0 lesec 0 keypress 0 io_caps 3 oob 0 min_key_size 7 max key size 16
116 0> PMM: DISCONNECTED, active 0x0 keep_bond_state 1
125 0> before bond 0 mitm 0 lesec 0 keypress 0 io_caps 0 oob 0 min_key_size 4 max key size 0
126 0> after bond 1 mitm 0 lesec 0 keypress 0 io_caps 3 oob 0 min_key_size 7 max key size 16
127 0> PM: Connected to a previously bonded device.
137 0> before bond 1 mitm 0 lesec 1 keypress 0 io_caps 3 oob 0 min_key_size 0 max key size 16
138 0> after bond 1 mitm 0 lesec 0 keypress 0 io_caps 3 oob 0 min_key_size 7 max key size 16

142 0> PM: PM_EVT_CONN_SEC_FAILED
143 0> 0:00:19.489 PM: Failed to secure connection. Error: 0085. Connection Lockout timer started

RE: Reconnecting bonded device using SDK15.2/SD6.1.0 sometimes fails with x0085 pairing not supported.

Simonr — Mon, 17 Feb 2020 12:50:02 GMT

Hi Mark

It seems like only the version with SDK v.15.2 is using the Peer Manager to call the PM_EVT_CONN_SEC_PARAMS_REQ event. I'm assuming that this request is not handled properly in your newer version as there are some changes between SDK versions. Please check out the peer manager library in order to see what events need to be handled by you.

Best regards,

Simon