BT Mouse re-connection issue with Lenovo NB T470

[Brian Chang]

Hi ,

Our customer use nRF52832 to design the mouse. Currently they had problem to do the connection with Lenovo T470 after power cycling (POWER OFF and  Then POWER ON)

In order to make issue easy , we ask customer to use SDK15.2  BLE_Periphrial HID mouse example to verify the issue.

What we observer was the nRF52832 was advertising but the T470 was not response it (never had us  connection indication). 

The window version of T470 was as bellowing

We had record the log by Ellisys sniffer 

52832 nRF5_mouse with T470.btt

Did you have ever see such kind of behavior

BR

Brian Chang

[Brian Chang]

Kenneth,

Lenovo said the Logitech mouse could be reconnect correctly so they do not accept to upgrade the window version was only solution

I attached the Logitech sniffer log

MX Anywhere 2S with T470_2.btt

I fund the different between the log of our SDK sample code / customer code with Logitech's log.

The sign bit field of Initiator Key Distribution  was set.

So bonding procedure was different.

However , in our code , if we set sign bit field , there will be an error happen.

How can we do to achieve the same secure configuration with Logitech????

It was very urgent since the project was going to do DVT status.

Thanks

BR

Brian