265
There are some great answers here, but many are out of date. Since May 2016, Raspbian has been able to copy wifi details from /boot/wpa_supplicant.conf into /etc/wpa_supplicant/wpa_supplicant.conf to automatically configure wireless network access:
If a wpa_supplicant.conf file is placed into the /boot/ directory, this will be moved to the /etc/...
69
Well, there is a very simple solution:
Go to /etc/ifplugd/action.d/ and rename the ifupdown file to ifupdown.original
Then do: cp /etc/wpa_supplicant/ifupdown.sh ./ifupdown
Finally: sudo reboot
That's all. Test this by turning off/on your AP; you should see that your Raspberry Pi properly reconnects.
59
Problem solved! It seems that even though I added the gateway information into the interfaces file, wlan0 didn't really have a default gateway.
When I ran
sudo route -n
it yielded
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 ...
31
I prefer to disable most of the network auto configuration and connection management daemon stuff and deal with it myself. Here's a (bash) script that will keep the connection up as long as the network is there and you do not have a glitchy wifi driver or power issues; the idea is to ping the router every N seconds, and if that fails, re-connect:
#!/bin/...
25
This applies to Raspbian Wheezy prior to 2015-05-05 for later (and Jessie/Stretch) See How do I set up networking/WiFi/Static IP
As suggested by the community, my answer extracted from the question.
I got it working right now so I'll share all my configuration files with the community. Firstly lets look at the wpa_supplicant.conf file:
pi@raspberrypi ~ $ ...
25
Some specific Instructions:
Contents of /etc/network/interfaces:
auto lo
iface lo inet loopback
allow-hotplug eth0
iface eth0 inet dhcp
allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
post-up ifdown eth0
iface default inet dhcp
Contents of /etc/wpa_supplicant/wpa_supplicant.conf:
ctrl_interface=DIR=/...
24
The default Raspbian /etc/network/interfaces configuration does not connect to WiFi on boot. The key lines of the interfaces man-page are:
Lines beginning with the word "auto" are used to identify the
physical interfaces to be brought up when ifup is run with the
-a option. (This option is used by the system boot scripts.)
...
Lines ...
22
I recently stumbled across a console application that sorts all the wireless configuration hell out. You can also use this tool to configure the LAN interface.
sudo apt-get install wicd-curses
It will install quite a few other packages and run its own daemon in the background but it sure makes configuring everything a whole lot easier. Run it with
sudo ...
19
In principle, yes. You can follow any tutorial for setting up a Linux PC as a router.
Useful Tutorials
Building an Arch Linux Router
Building a Linux Router
17
Default behavior seems to consist in storing wifi settings in /etc/wpa_supplicant/wpa_supplicant.conf, just like @lucaslink mentionned. I'd like to provide a bit more details however. Here is how the wpa_supplicant.conf file is supposed to look like:
$ sudo cat /etc/wpa_supplicant/wpa_supplicant.conf
ctrl_interface=DIR=/Var/run/wpa_supplicant GROUP=...
16
I changed auto to allow-hotplug for wlan0 in my /etc/network/interfaces, see below:
pi@raspbmc:~$ cat /etc/network/interfaces
#auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
That worked for me!
I'm really not sure why this worked. The Debian documentation at this link is confusing to me because ...
15
I changed wpa-ssid ="network-essid" to wireless-essid my_essid_without_quote and, now, it works fine.
auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp
wireless-essid my_essid_without_quote
15
For me, the recommended solutions above were unsatisfactory. For one, I have a blank in my SSID, so I needed to specify it in quotes. Secondly, I have several SSIDs here, and I want to connect to one specifically. I used this in the file /etc/wpa_supplicant/wpa_supplicant.conf and it worked:
network={
ssid="my ssid with spaces"
key_mgmt=NONE
}
14
The script mentioned in the darrenjw's answer downloads a pre-compiled module based on your kernel version. It's quite likely that one of these modules will work for you though you might have to search through the script to find the right module. The lastest one worked for me, I'd start by downloading and trying that.
wget http://dl.dropbox.com/u/80256631/...
14
This can be solved with no extra scripts.
In /etc/network/interfaces put:
allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp
The roaming allows the interface to self-heal.
13
Instructions for cross-compiling
Downloaded the driver sources from the Edimax website.
Clone the kernel sources from GitHub.
cd into your kernel source and cd into include/linux. Run
ln -s smp.h smp_lock.h`.
unzip the Edimax download and tar -xzf the driver package. cd into the driver/rtl... subdirectory.
Edit include/rtw_xmit.h and add #include <...
12
This is caused by inadequate power. Use a good power supply and a good
power cable. Some cheap cables that work with a cell phone, cannot
fully power the R-Pi. Some USB devices require a lot of power: most
will have a label showing the voltage and mA requirements. They should
be 5v 100mA each max, any more than this they must be used with a
powered ...
12
This happens a lot with one of my Raspberry Pis. I have a script which checks for an Internet connection and runs ifup wlan0 when a connection is not present. Some of the things you could try:
Rebooting the Raspberry Pi
Checking that you have a valid IP address using ifconfig
Ensuring that you have power-saving features disabled on the dongle by adding ...
11
This sounds like a power problem. The Raspberry Pi can only supply a limited amount of current to the USB peripherals.
Try connecting the peripherals through a USB powered hub.
11
Since November 2016 SSH has been disabled by default in standard Raspbian images for security reasons.
To re-enable it, create a blank file called either ssh or ssh.txt on the sd card boot folder ( fat32 partition accessible from windows)
To preconfigure the wifi settings, you also create a file called wpa_supplicant.conf there containing:
ctrl_interface=...
11
Add the following to the end of /etc/wpa_supplicant/wpa_supplicant.conf :
network={
key_mgmt=NONE
priority=-999
}
That'll connect to any open / unsecured wifi in range.
The priority line just means it'll connect to any of your other named networks in preference.
11
I have developed lazycast that is designed to work on Raspberry Pi 3. lazycast follows (most of) the wifi display specification (commercially known as Miracast) and uses wifi p2p (commercially known as WiFi Direct) to set up a connection. I have tested it with Windows 8.1 and 10 sources. It requires no modification (using the built-in wifi) to the hardware ...
10
Good power supply is not enough. USB ports on RaspberryPi are behind polyfuses which limits current that can drawn from it to about 140mA (in practice, it should be even smaller). So no matter how good your power supply is, if your USB device wants more than say 120mA of power, it will fail. Note that USB specification says that enumerated device can take up ...
9
I know this is an old question, but it was the first result that came up in my search when I had essentially the same problem on my freshly installed Pi Zero.
I found the key to my answer on this other question, among other sources.
So basically, though the Pi itself apparently doesn't have a sleep mode, individual devices in Linux (including the network ...
9
You might have multiple instances of wpa_supplicant running.
try
ps ax | grep "wpa_supplicant -B" | grep -v grep
kill {pid of wpa_supplicant}
if that works then you can try this
sudo kill $(pgrep -f "wpa_supplicant -B")
sudo ifconfig wlan0 down
sudo ifconfig wlan0 up
sudo rm -r /var/run/wpa_supplicant/*
sudo wpa_supplicant -B -iwlan0 -f/var/log/...
9
This setup is DEPRECATED and no longer maintained!
Look at Access point as WiFi repeater, optional with bridge for a more flexible setup.
It is possible to use the wifi device on a Raspberry Pi as an access
point and at the same time connect as client to another already
established wlan. I have heard this is possible for RPi-0W, RPi-3B and
RPi-3B+. But ...
8
Something is wrong. The pi does not have a "sleep mode".
I've only had my pi a few weeks and have not left it on the whole time, but I intend to eventually and I have left it on for some long stretches. I'm running raspbian, and I have a personal dislike for NetworkManager, lol, so that is disabled. To keep the wifi up, I run a script which pings the ...
8
I used simple steps and it perfectly worked for me:
Open a root terminal in raspberry Pi. Now you need to edit your script that's starting X. In the default build with lightdm.
Open "lightdm.conf" file located in,
/etc/lightdm/lightdm.conf
Add below line in to SeatDefault (or Seat:* in newer LightDM versions) section.
[SeatDefaults]
xserver-command=X -...
8
If a device does not have internet access or other access outside the local subnet, then you should eliminate the gateway. Listing a gateway on both interfaces is likely the culprit.
If the ethernet is for the local subnet only remove that gateway.
8
If you want to use the PI exclusively as a HTPC or media center, you could use a distribution geared towards such applications. OpenELEC/XBMC /RasBMC seem to be the obvious choice. I did try OpenELEC at one time, but getting WiFi to work reliably on it seemed to be a pain.
Here's how I went about using Raspbian (since I use the RPi for tasks other than ...
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