5340, Zephyr failure to connect to Polar Heart rate strap; ble wireshark trace

[OwainIncus]

Hi ,

I have compiled in Heart rat relay into my app; can scan and connect to simulator and garmin HR straps; but fail to connect to polar.
My debug log shows...

So security is encryption, no auth and I get an "unspecified" error.

I have done a BLE wireshark trace; but cannot see anything in the trace to indicate the issue.

Would be grateful if someon could look and give me a clue to whats going wrong.

Here is wireshark trace....

polarHrmActiveScanConnectFail.pcapng

Regards,

Owain

[Hung Bui]

Hi Owain, 

Have you tried to test using the central_uart example to connect to the Polar ? 

Do you use CONFIG_BT_SMP_SC_ONLY in your project configuration ? 
This will force the pairing to only Secure Connection. It doesn't seem the Polar band support Secure Connection. 

There is some discussion here with the same error BT_SECURITY_ERR_UNSPECIFIED and related to nRF53 and legacy pairing: 

https://github.com/zephyrproject-rtos/zephyr/issues/37228

Could you try CONFIG_BT_TINYCRYPT_ECC=y to see if it work. Note that you may need to rebuild and reflash hci_rmsg

I would suggest to double check using nRF52 which doesn't seems to have this error. 

[OwainIncus]

Config for the App does not have CONFIG_BT_SMP_SC_ONLY set; and has CONFIG_BT_TINYCRYPT_ECC set.
I will attach the .config. Can you anything wrong in the BLE trace or does all look good?

The 37228 issue sounds pretty much like what I am getting....

0042.config.txt

[OwainIncus]

Here more debug but with CONFIG_BT_DEBUG_SMP=y

033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.016,998] \033[0m<inf> app: connected: Central: connected to F0:C9:75:7D:CB:FF (random)
\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.017,059] \033[0m<inf> app: connected: security is currently 1
\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.017,150] \033[0m<dbg> bt_smp: smp_send_pairing_req: \033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.018,615] \033[0m<dbg> bt_smp: smp_init: prnd 2ec0d9a9193c2b1b54b14f14734e4279\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.018,768] \033[0m<inf> app: connected: security set to BT_SECURITY_L2
\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.020,782] \033[0m<inf> app: systemProcessThread: System got EVENT_BLE_PERIPHERAL_CONNECTED\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.517,974] \033[0m<dbg> bt_smp: bt_smp_recv: Received SMP code 0x02 len 6\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.518,035] \033[0m<dbg> bt_smp: smp_pairing_rsp: \033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.518,127] \033[0m<dbg> bt_smp: legacy_pairing_rsp: \033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.518,280] \033[0m<dbg> bt_smp: smp_c1: k 00000000000000000000000000000000\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.518,371] \033[0m<dbg> bt_smp: smp_c1: r 2ec0d9a9193c2b1b54b14f14734e4279\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.518,554] \033[0m<dbg> bt_smp: smp_c1: ia 40:68:15:E7:B9:37 (random)\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.518,737] \033[0m<dbg> bt_smp: smp_c1: ra F0:C9:75:7D:CB:FF (random)\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.518,829] \033[0m<dbg> bt_smp: smp_c1: preq 0100000d100707\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.518,890] \033[0m<dbg> bt_smp: smp_c1: pres 02030001100303\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.518,981] \033[0m<dbg> bt_smp: smp_c1: p1 01010100000d10070702030001100303\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:12.519,256] \033[0m<dbg> bt_smp: smp_c1: p2 ffcb7d75c9f037b9e715684000000000\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.018,035] \033[0m<dbg> bt_smp: bt_smp_recv: Received SMP code 0x03 len 16\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.018,127] \033[0m<dbg> bt_smp: smp_pairing_confirm: \033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.518,066] \033[0m<dbg> bt_smp: bt_smp_recv: Received SMP code 0x04 len 16\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.518,127] \033[0m<dbg> bt_smp: smp_pairing_random: \033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.518,188] \033[0m<dbg> bt_smp: legacy_pairing_random: \033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.518,280] \033[0m<dbg> bt_smp: smp_c1: k 00000000000000000000000000000000\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.518,371] \033[0m<dbg> bt_smp: smp_c1: r d316e0f3d51aaefd4c0a38df9f5ec1cb\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.518,554] \033[0m<dbg> bt_smp: smp_c1: ia 40:68:15:E7:B9:37 (random)\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.518,737] \033[0m<dbg> bt_smp: smp_c1: ra F0:C9:75:7D:CB:FF (random)\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.518,829] \033[0m<dbg> bt_smp: smp_c1: preq 0100000d100707\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.518,890] \033[0m<dbg> bt_smp: smp_c1: pres 02030001100303\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.519,012] \033[0m<dbg> bt_smp: smp_c1: p1 01010100000d10070702030001100303\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.519,287] \033[0m<dbg> bt_smp: smp_c1: p2 ffcb7d75c9f037b9e715684000000000\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.519,531] \033[0m<dbg> bt_smp: legacy_pairing_random: pcnf 2e7254e2fc169911f174a35f9f321152\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:13.519,622] \033[0m<dbg> bt_smp: legacy_pairing_random: cfm 2e7254e2fc169911f174a35f9f321152\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:28.018,096] \033[0m<dbg> bt_smp: bt_smp_disconnected: chan 0x20009bec cid 0x0006\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:28.018,188] \033[0m<dbg> bt_smp: smp_pairing_complete: status 0x8\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:28.024,200] \033[0m<dbg> bt_smp: bt_smp_encrypt_change: chan 0x20009bec conn 0x20009790 handle 0 encrypt 0x00 hci status 0x1f\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:28.024,261] \033[0m<dbg> bt_smp: smp_pairing_complete: status 0x8\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:28.024,444] \033[0m<inf> app: authPairingFailed: Pairing failed: F0:C9:75:7D:CB:FF (random) reason: 9
\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:28.024,719] \033[0m<inf> app: securityChanged: Security failed: F0:C9:75:7D:CB:FF (random) level 1 err 9
\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:28.024,780] \033[1;31m<err> bt_gatt_dm: bt_gatt_dm_start: Discover failed, error: -128.\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:28.024,841] \033[0m<inf> app: gatt_discover: Could not start the discovery procedure, error code: -128
\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:28.030,883] \033[0m<inf> app: disconnected: Peripheral disconnected (reason 0x08)
\033[0m
\033[1;32mnovaPro>\033[m\033[8D\033[J\033[1;32mnovaPro>\033[m\033[8D\033[J[00:01:28.031,372] \033[0m<inf> app: systemProcessThread: System got EVENT_BLE_PERIPHERAL_DISCONNECTED\033[0m
\

[Hung Bui]

Hi Owain,

Have you tried to test using the central_uart example to connect to the Polar ? 

[OwainIncus]

Hi Hung,

I attached the config yesterday. Yeah all works fine with the Gamin strap; bonded ok.