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It appears the wifi is working, and the device can see my SSID. However when it connects it gets an error:
CTRL-EVENT-ASSOC-REJECT status_code=16
I checked my router and the 2.5 GHz network settings. I have seen many posts with similar issues and none seem to have the resolution I need. I did a full apt update/upgrade and rebooted several times.
How do I troubleshoot this issue and get the wifi working?
I encountered the same problem with a Raspberry Pi 4B. In my case, it was related to the fast roaming feature. To temporarily disable it for the Broadcom WiFi driver, run the following two commands:
rmmod brcmfmac
modprobe brcmfmac roamoff=1
Afterwards, try to connect to your access point again:
wpa_supplicant -iwlan0 -c/etc/wpa_supplicant/wpa_supplicant.conf
If the connection was successful, you can persist the roamoff setting by creating /etc/modprobe.d/brcmfmac.conf with the following content:
options brcmfmac roamoff=1
