BLE set custom Packet Header.

RE: BLE set custom Packet Header.

Sigurd — Thu, 03 Feb 2022 16:16:54 GMT

The radio transmitter example in the nRF5 SDK could be a good starting point.

NKern — Thu, 03 Feb 2022 15:53:34 GMT

Great, but how?

Sigurd — Thu, 03 Feb 2022 15:20:26 GMT

[quote user="NKern"]Can we get direct low-level access to RADIO on NRF51-DK or NRF52-DK?[/quote]

Yes.

NKern — Thu, 03 Feb 2022 15:07:25 GMT

Thank you for quick response.

Can we get direct low-level access to RADIO on NRF51-DK or NRF52-DK?

Sigurd — Thu, 03 Feb 2022 12:28:50 GMT

Hi,

[quote user=""]SoftDevice API allows us to modify only Broadcast Data (AdvData = 31 byte), which does not break what we need.[/quote]

And in addition, it does not allow you to generate invalid packets, i.e. packets that does not follow the Bluetooth spec.

[quote user=""]So we are looking for a way how to modify with custom data all of the mentioned data structures:[/quote]

This is not supported with the SoftDevice. You will need to access and use the RADIO directly. The only code I'm aware of that does something similar like this is the beacon advertising done in SD timeslots in the Thingy:52 FW: https://github.com/NordicSemiconductor/Nordic-Thingy52-FW/blob/master/source/util/advertiser_beacon_timeslot.c

[quote user=""]2. What part in BLE data format (if any) defines the total overall packet length to be accepted by BLE scan device?[/quote]