0

I'm currently using a raspberry pi 3. Even though it comes with a built in wifi card, it does not seem to find any wlan interface. I think this is due to the operating system being an older version. To fix this problem, I tried to connect the pi to the internet through my laptop using an ethernet cable and update it. Installing a new operating on the SD-Card is out of question, since the pi is not mine and might have important data/configuration. The problem I'm facing right now is that the pi cannot connect to the internet. I tried to configure the connection method to 'shared to other computers', it did not work. I also followed this tutorial https://www.raspberrypi.org/forums/viewtopic.php?t=6997&p=87671
At first it worked, the pi would connect to it, but I recently upgraded the Kernel on my Laptop and since then it is not working anymore.

I'm starting to get really desperate, I couldn't find anything to solve this problem. Is it possible that the firewall is blocking the connection? If so how can I configure it?

NOTE: My laptop is Ubuntu 16.04

  • 1
    have you considered getting a second SD card? – Steve Robillard Dec 15 '17 at 21:15
  • no, I'm also using other pi's (older versions with wifi dongle) they also have the same issue. I'm looking for a quick fix to be honest – Merve Sahin Dec 15 '17 at 21:16
  • It seems as though you think the problem is with the firewall on your Laptop - which is not really an RPi problem IMHO. – SlySven Dec 17 '17 at 1:24
0

I got WIFI working now! The issue was that the wifi needed to be configured with the correct locale to access WIFI. sudo iwlist channel returned channels from 1 to 11, however to access the WIFI from my current location it needed to have at least 12 or 13 channels.

For anyone who has the same problem, this might help you:

This is how my /etc/network/interfaces file looks like:

allow-hotplug wlan0
auto wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf

iface default inet dhcp

To establish a connection to your WIFI change this file /etc/wpa_supplicant/wpa_supplicant.conf:
(It's important that country code is given here)

country=NL
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
   ssid="YOUR-WIFI"
   #if you do not have any password then use this
   key_mgmt=NONE 
   #else put your password like this
   psk="your-password"
}

To configure the channels execute these:

dmesg -T | grep -iE 'domain|region'
cat /etc/default/crda

if it the locale is empty, then set it to NL:

sudo nano /etc/default/crda

iw reg get
sudo iw reg set NL #your country code
iw reg get
iwlist wlan0 channel

The output should show more than 11 channels.
Now it shoud be rebooted!

The only thing I found strange is, that the pi cannot detect any wireless interfaces on the GUI, however it still connects to the WIFI

Not the answer you're looking for? Browse other questions tagged or ask your own question.