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You might begin by verifying the pin numbers. WiringPi uses a numbering system that is different from other libraries. A good source for wiringpi pin numbers is the Raspberry Pi Pinout website. Clicking on a pin - for example GPIO 4 will reveal the numbering system specific to the wiringpi library. You should also take a look at the documentation for the ...


Try running sudo apt update; sudo apt dist-upgrade -y; sudo reboot there's a brand new update to the WiFi firmware packages to resolve this failure.


It could be that DFS/TPC channels were disabled because they used to cause issues such as this one. If you weren't affected by these problems, try getting WiFi chip firmware from an older Pi OS image. The files you need are located in /lib/firmware/brcm/, on my Pi 4 the brcmfmac43455-sdio.* files are used. Changing the country might also help, but this may ...

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