Issue with Bluetooth Pi Zero 2W

[hkfuertes]

Hello, I finally made my Zero 2W bring up Bluetooth. By default it complains that the patch bcrm/BCM.hcd is missing. But its right there in /lib/firmware/bcrm/BCM43430B0.hcd. I manage to fix this by ssh into the PI and copying it to the new name:

cd /lib/firmware/bcrm/
cp BCM43430B0.hcd BCM.hcd

So that's the fix, but I don't know how to integrate it into Buildroot, and therefore, not able to open a PR.

[gamelaster]

I used it on Z2W yesterday, and everything worked perfectly for me.

[nisargjhaveri]

I've also been using with RPi Zero 2W without any issue. Are you facing the issue even with the prebuilt images?

[hkfuertes]

Yes, I started having the issue with the prebuilt images... now I' m building the images myself, and added this step in post-build.sh and it works now :) (or at least it brings up Bluetooth, as my KIA does not like this version... I'm trying now @BluemediaGER's version)

[gamelaster]

@hkfuertes On my KIA Niro 2017 it works flawlessly.

[BluemediaGER]

@hkfuertes My fork changes nothing in that regard, but feel free to try it. I'm also using a Pi Z2W (and a Pi 4 for testing), and I didn't have these problems.

[hkfuertes]

Sorry I'm late, but yes you where all right, it has to be my board. Yesterday I built a PI3A+ Image with this repo, and it works flawlessly on my KIA. I will investigate, and maybe get another Zero2W, as mine was never used since I bought it on launch (maybe its outdated 🤷‍♂️ ).

I guess we can close this issue. BTW, I will try to make a PR this evening to add the defconfig I used for the PI3A+, mainly the Zero2W's with the proper dtb (from Buildroot oficial pi3 defconfig) and as this board has 5GHZ, the hostapd from PI4 Overlay. I need to check if in the dtoverlay=dwc2,dr_mode=peripheral, 'dr_mode' is required or not, for now I have it, but maybe is not necesary, and then the defconfig can be simpler.

(In case anyone is curious, the 3A+ only has a single USB, with no hub, so the controller can also be put in gadget mode, then with a USBA to USBA cable, everything works, even it takes power from there!)

[niravatgit]

I've also been using with RPi Zero 2W without any issue. Are you facing the issue even with the prebuilt images?

Please share link/location for the prebuilt images. I built it yesterday and was testing it today, but Bluetooth is not coming up. #13

[hkfuertes]

I Will try to build one, but if you can build it yourself, I can tell you what to add.

Inside buildroot/board/raspberrypi/post-build.sh add at the end:

cd ${TARGET_DIR}/lib/firmware/brcm
if [ ! -f BCM.hcd ]; then
    ln -s BCM43430B0.hcd BCM.hcd
fi

[nisargjhaveri]

This should now be fixed by 8c0dd4c42ee6d860f82895671bff2dca9de97c03.