problem advertise duration on SoftDevice V6.0.0(nrf52832)

[loquat]

I test SoftDevice V6.0.0 on nrf52832(BLENANO2)

I run
1. sd_ble_gap_scan_start() 1000ms/100ms/10ms scan_window/scan_interval
2. sd_ble_gap_adv_start() 1000ms interval

result. (see picture)
for example,
scan interval is 1000ms, scan-off -> advertise -> scan-on duration is about 1000ms.
scan interval is 10ms, scan-off -> advertise -> scan-on duration is about 10ms.

Why?

[tesc]

Hi,

The way scanning works, is that the SoftDevice schedules a timeslot event for each scan event, which lasts for the entire scan window. When timing events overlap only one of them will run while the others are dropped entirely.

What you see is one scan event being dropped when an advertising event is successfully scheduled. It leaves a break in scanning corresponding to one scan interval.

What event to run and what event to drop is decided as documented in SoftDevice timing-activities and priorities.

Regards,
Terje

[loquat]

Oh, really.

I had a misunderstanding.

Tahnk you.