LLPM questions

Dear Nordic engineers

I ask a question about LLPM some time ago and I accidentally closed the discussion.Now there is a new follow up.

devzone.nordicsemi.com/.../llpm-questions

1、This issues has a FAE is working on it.We intercepted the packet and found that communication packet in the air is normal.This problem is because the callback function is not entered.Please give me some  good suggestions for this problem.  

2、Because this issues was only discovered during their internal testing, and there are no related complaints about products currently on the market, we suspect it is a problem with the test computer.Can be put on hold for now.

Now they have some new questions and need your help.

1、How to modify the connection interval of LLPM?We try to use function call set_conn_params in ble_conn_params.c to increase the connection interval  when received USB_DC_SUSPEND event.This is correct.When LLPM mode is enabled,the connection interval parameter ranges from 1000us to 7000us.Now we hope that the power consumption can be lower,so we would like to set the connection interval to be larger,but if modify the larger parameter ,it will not take effect.Is there any other way to modify the connection interval?

2、The LLPM mode communicates with the dongle.When there is a lot of communicates data,the event queue will overflow,causing the connection to be disconnected.Please tell me,how to increase the size of the event queue?

Thank you for your support and best regards~

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