Raspberry Pi 3B+ and 4 "No wireless interfaces found"
Story short. I had installed Raspbian [Full] 64bit via NOOBS on a Pi 4. later I had to use my Pi 3B+, as i couldn’t find the type-C charger. Worked fine. Today after half a year having the pi in the closet, i found out that the internet didn’t work on it. switched to pi 4. Same problem. If i hover the mouse over the wifi icon, I get the message “No wireless interfaces found”. Neither the Ethernet port or wifi works, however Bluetooth are able to turn on.
I see that other people have this problem too, and as i only have installed MagicMirror, I thought it would be alright to post it here, to see if other found a solution other that format and reinstall raspbian.
What I did try (without quotation marks, and after = is console output):
“Sudo ifup wlan0” =
wpa_suppliant: cannot read contents of /etc/wpa_suppliant/wpa_suppliant.config
run-parts: /etc/network/if-pre-up.d/wpasuppliant exited with return code 1
ifup: failed to bring up wlan0
“sudo ifdown wlan0” =
ifdown: interface wlan0 not configured
“sudo rfkill” =
ID TYPE DEVICE SOFT HARD
0 wlan phy0 unblocked unblocked
1 Bluetooth hci0 blocked unblocked
I will keep updated on how it goes.
@Blauenfeldt are u sure this is 64 bit? Cause pi os is supposed to be64 bit & not ready yet.
In the. Menu top left select preferences, interfaces I think, to turn on networking.
In Noobs the is one with “32 bit” at the end, and that’s not the one i have have installed. My raspbian version in Buster, if that helps.
what I have:
Serial Port Disabled (greyed out)
Remote GPIO Disabled
I also can’t select Wifi Country code. It keeps forgetting it after clicking on ok
If i do it through
sudo raspi-configI get “Could not communicate with wpa_suppliant” followed with “There was an error running option I4 Change wi-fi Country”
This is what I got, when I run: dmesg | grep brcmfmac
Is this as it should be?
Thanks for helping me with this.
I can try and take a picture in Noobs Recovery and upload it.
@Blauenfeldt I never use noobs
install it without noobs. Noobs has given me problems in one way or another when I have used it. The issues range from a lot of things depending on what you are doing …
Go get the raspbian desktop image and just use that … it is just as easy to install as noobs and more than likely you will have working wifi when finished.
If you have another sd card (and dont want to erase your noobs one) just try it out on a second card… you will get it going.
I guess I have to do that.
I have used a lot of time compiling and makeing things forward/backwards compatible python wise. Is there a way to save and transfer that?
Now that i look this post through, I saw that rfkill says “wlan”. Is it possible, that my Pi looks for wlan0 and not wlan, and therefore not being able to find it?
will list the network interfaces
I did some digging around the net, and kinda got wifi working again. Wifi itself works fine. I can do
sudo iwlist wlan0 scan, and see surrounding wifi. However the drop-down list on the panel does not work.
What i did to get my wifi working to this point was changing the
auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp auto wlan0 allow-hotplug wlan0 iface wlan0 inet dhcp wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
I found out I had some spelling errors like
.confand found a default Buster Wpa_supplicant.conf file
here is my new
eth0: flags=4163 mtu 1500 inet 192.168.87.198 netmask 255.255.255.0 broadcast 192.168.87.255 inet6 fe80::dea6:32ff:fe20:55bf prefixlen 64 scopeid 0x20 ether dc:a6:32:20:55:bf txqueuelen 1000 (Ethernet) RX packets 1775 bytes 510729 (498.7 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 1633 bytes 972722 (949.9 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73 mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10 loop txqueuelen 1000 (Local Loopback) RX packets 275 bytes 80411 (78.5 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 275 bytes 80411 (78.5 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 wlan0: flags=4163 mtu 1500 inet 192.168.87.199 netmask 255.255.255.0 broadcast 192.168.87.255 inet6 fe80::dea6:32ff:fe20:55c0 prefixlen 64 scopeid 0x20 ether dc:a6:32:20:55:c0 txqueuelen 1000 (Ethernet) RX packets 20 bytes 2957 (2.8 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 32 bytes 5653 (5.5 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Everything works, even ethernet, except for the wifi drop-down menu (shown below)
If I hover the mouse over it it says “connection to dhcpcd lost”
If I click on it, it says “No wireless interfaces found”
Can not really find anymore answers to this problem.
Have i disabled something somewhere?