Can you guys check this older firmware that I mentioned earlier? It's quite easy to do but please make sure that you are able to connect to your RPi over ethernet in case this firmware does not work at all!
First, run the nightly with working WiFi, connect over SSH and execute this:
Codemkdir -p /storage/.config/firmware/cypress wget https://github.com/RPi-Distro/firmware-nonfree/raw/ad23f33a29fb7f8bc344d80d0eb40abe1953d145/debian/config/brcm80211/cypress/cyfmac43455-sdio-standard.bin -O /storage/.config/firmware/cypress/cyfmac43455-sdio.binReboot. Check WiFi. If working, update to latest nightly and check WiFi. Please report your result.
In case this firmware breaks WiFi even on older builds, delete it:
I haven't ever SSH'd into the Pi unfortunately. I do have Putty on the windows laptop, and tried logging in with the instructions here from the documentation...but no luck yet getting into the Pi to be able to test this. Maybe with some extra guidance I could make it happen.
Open a terminal window on your computer and enter the following command, replacing the <ip address> placeholder with the IP address of the Raspberry Pi you’re trying to connect to and <username> with your username:
When the connection works, you will see a security warning. Type yes to continue. You will only see this warning the first time you connect.
Enter your account password when prompted.
You should now see the Raspberry Pi command prompt:
You are now connected to the Raspberry Pi remotely, and can execute commands.