How to make BLE scan on the specific channel in 37 only, 38 only and 39 only, is it possible to do?

[iqcosmicxx]

We are doing the certification to our product, in which they asked me to do BLE scan on the 37th channel, then 38th channel and 39th channel separately to pass the certification.

I don't know where this low-level stuff is handled in the NRF SDK, I am using 15.2 sdk version, nrf52840 chip set.

Do I need to add this config in sdk_config.h?

or Do I need to add in the nrf_ble_scan.c?

or it's something soft device take care of it?

[iqcosmicxx]

I got more detailed info. They want to check during advertisement other channels are not disturbed by the radiation, do you know to advertise on the specific band such as 37 only?

[Kenneth]

When starting scanning or advertisement you have the possibility to control a parameter called:

ble_gap_ch_mask_t     channel_mask;               /**< Channel mask for primary and secondary advertising channels.
                                                         At least one of the primary channels, that is channel index 37-39, must be
                                                         set to 0.

This should do what you want.