Trouble Connecting Pi 3B+ to OpenWrt 21.02.0-rc3


Just did a fresh install of OpenWrt 21.02.0-rc3 on a WRT1900 AC v1 previously running a Davidc502 build (OpenWrt SNAPSHOT r13059-9fac9168c6 / LuCI Master git-20.116.42735-f44ba48)

Path of install is as follows: Davidc502 build --> OEM -- > OpenWrt 21.02.0-rc3 Did NOT preserve any data between installs.

After configuring the new install everything seemed to be functioning except the Pi 3B+ will not connect / stay connected via WiFi via the onboard radio to the new install of OpenWrt on the WRT1900AC.

The Pi 3B+ constantly appears and then disappears in the Associated Stations list.

Have rebooted both the Pi3B+ and the WRT1900 AC several time.

Any suggestions?

Does it work plugged by cable?

Haven't tried but will.

I also need to find a monitor to plug into the Pi so I can check out the logs when it is trying to connect.

@Hikari Here is what I found in the OpenWrt System Log:

Thu Jul  8 12:58:13 2021 daemon.notice hostapd: wlan0: AP-STA-POSSIBLE-PSK-MISMATCH xx:xx:xx:xx:xx:xx
Thu Jul  8 12:58:19 2021 hostapd: wlan0: STA xx:xx:xx:xx:xx:xx IEEE 802.11: authenticated
Thu Jul  8 12:58:19 2021 hostapd: wlan0: STA xx:xx:xx:xx:xx:xx IEEE 802.11: associated (aid 4)

"Fixed" via trial and error.

There was NO option ieee80211w in /etc/wireless in the previous version of OpenWrt that was running on the WRT1900 AC.

In OpenWrt 21.02.0-rc3 in /etc/wireless there was option ieee80211w = "1"

Changed to option ieee80211w = "0" allowed the Pi 3B+ to connect.

Now to figure out what ieee80211w does.

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I guess that this should prevent so-called "deauth" attacks, among other things, since these "frames" (commands) are unencrypted.
At least it will probably go in this direction.
at least that's how I suspect - but I don't know exactly!

Yea. Was reading up on it.

Any idea on how to get it working?

Apparently my Pi 3B+ supports it, I think.

$ iw phy | grep -A9 "Supported Ciphers"
	Supported Ciphers:
		* WEP40 (00-0f-ac:1)
		* WEP104 (00-0f-ac:5)
		* TKIP (00-0f-ac:2)
		* CCMP-128 (00-0f-ac:4)
		* CMAC (00-0f-ac:6)
	Available Antennas: TX 0 RX 0
	Supported interface modes:
		 * IBSS
		 * managed

Is the problem on the Pi 3B+ or OpenWrt 21.02.0-rc3?

PSK Missmatch sounds for me like:

  • Wrong "Passwort" for SSID
  • Wrong WPA2 Encrpytion / Cipher (CCMP vs. TKIP)

I think, it will not be generaly an Problem with both of them, maybe a little thing?
On Pi is running an debian?

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