HCI Controller Multiple Connection Support

RE: HCI Controller Multiple Connection Support

Einar Thorsrud — Tue, 26 Aug 2025 17:31:01 GMT

Hi,

The controller itself has a default address from FICR, so if you are advertisign or scaning using the identity address, this should always be used. Likely you are using a random resolvable address or similar? Alternatively, if you need to set the address you can do that from the host side using the BT_HCI_OP_VS_WRITE_BD_ADDR HCI command. You can see an example of that here (this is for the nRF53 where the host and controller runs on separate cores, which is much the same as running them on different devices).

RE: HCI Controller Multiple Connection Support

LukeC — Sun, 24 Aug 2025 02:10:12 GMT

That worked, thanks!

I have one further issue I am working through on this HCI build.

I cannot get the HCI controller to read the settings and restore the MAC address. It seems to be random each time.

From the warning message in the conf file, it looks like the CONFIG_BT_SETTINGS has a dependency incompatible with HCI_RAW. Is there another way I can read the MAC so it is persistent?

RE: HCI Controller Multiple Connection Support

Einar Thorsrud — Mon, 04 Aug 2025 13:24:43 GMT

Hi,

I see you have set CONFIG_BT_CTLR_ADV_SET to 2, and depending on your requiermetns you can set it higher. However, you should also set CONFIG_BT_CTLR_SDC_PERIPHERAL_COUNT=4 (or some other sensible number).