Bluetooth pairing issue with CYW43455

[BaM_4840156]

Hi Folks,

AnjanaM_61​

I’m using CYM43455 module with the customized board and Jetson Xavier NX SoM.
When I try to pair bluetooth with other bluetooth supported device like mobile, the pairing does not occur.
The bluez version used is  5.48
The problem is when the “pair” command is issued, it connects for one instance and disconnects immediately in less than 30seconds.

The device is not getting paired and the connection is also not established.
( Below logs for reference)

[bluetooth]# pair F4:F5:F6:F3:88:3C 
Attempting to pair with F4:F5:F6:F3:88:3C 
[CHG] Device F4:F5:F6:F3:88:3C Connected: yes 
Failed to pair: org.bluez.Error.AuthenticationFailed 
[CHG] Device F4:F5:F6:F3:88:3C Connected: no 

I tried using connect <bt-adrs>  command too and got the below error.
Failed to pair: org.bluez.Error.ConnectionAttemptFailed

I have also tried the solutions given in the link Pairing issue with Bluetooth in CYW43455 question chain.

Still the issue exists.

I am attaching the btmon logs below.

Can anyone please help me find the cause of the issue?

Thanks,

Bala

[Zhengbao_Zhang]

Hello:

@ MGMT Event: Device Found (0x0012) plen 58           {0x0003} [hci0] 34.390398

        BR/EDR Address: F4:F5:DB:A2:69:4A (Xiaomi Communications Co Ltd)

        RSSI: -99 dBm (0x9d

if this rssi is true, it is very low.

[BaM_4840156]

Hi ZhengbaoZ_96​,

I tried using some other BT devices with RSSI value ranging between -20 to -99dBm.

Still faced the same issue in bluetooth connection.

[Zhengbao_Zhang]

What is the Supervision timeout for 43455 ?

You can change it to 15s for a try .

> HCI Event: Link Supervision Timeout Ch.. (0x38) plen 4  #90 [hci0] 114.090169

        Handle: 12

        Timeout: 5000.000 msec (0x1f40)