#rtl8192cu

Usar lsusb para asegurarse del chipset y revisar en Internet si el chipset soporta modo master

# Instalación del driver: apt install linux-headers-$(uname -r) build-essential dkms dnsmasq # Sacado de: http://forum.ipfire.org/viewtopic.php?t=14654 git clone https://github.com/pvaret/rtl8192cu-fixes.git dkms add ./rtl8192cu-fixes dkms install 8192cu/1.8 # si ese falla, probar dkms install 8192cu/1.10 o dkms install 8192cu/1.11 etc

depmod -a cp ./rtl8192cu-fixes/blacklist-native-rtl8192.conf /etc/modprobe.d/

# Tal vez sea necesario configurar udev para que use wlan0, para eso debemos usar la mac, ifconfig -a mcedit /etc/udev/rules.d/70-persistent-net.rules SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="60:e3:27:1f:64:4a", NAME="wlan0"

# Configurar la interfaz de red mcedit /etc/network/interfaces auto wlan0 allow-hotplug wlan0 iface wlan0 inet static    address 10.0.0.1    netmask 255.255.255.0

# Configurar dnsmasq mcedit /etc/default/dnsmasq DNSMASQ_OPTS="--conf-file=/etc/dnsmasq.conf" mcedit /etc/dnsmasq.conf interface=wlan0 dhcp-range=10.0.0.20,10.0.0.200,12h dhcp-option=1,255.255.255.0

# Descargar hostapd desde: https://w1.fi/hostapd/ # Si se busca la version 2.5: https://w1.fi/releases/ # Instalar y configurar hostapd tar xzvf hostapd-2.5.tar.gz cd hostapd-2.5/ git clone https://github.com/pritambaral/hostapd-rtl871xdrv.git patch -Np1 -i hostapd-rtl871xdrv/rtlxdrv.patch cp hostapd-rtl871xdrv/driver_rt* src/drivers/ cp -f hostapd-rtl871xdrv/.config hostapd/.config cd hostapd hostapd-2.5/hostapd# make && make install

# Configurar hostapd: mcedit /etc/hostapd/hostapd.conf interface=wlan0 driver=rtl871xdrv ssid=pico hw_mode=g channel=6 macaddr_acl=0 ignore_broadcast_ssid=0 auth_algs=2

#####Sets WPA and WPA2 authentication##### #wpa option sets which wpa implementation to use #1 - wpa only #2 - wpa2 only #3 - both wpa=1 #sets wpa passphrase required by the clients to authenticate themselves on the network wpa_passphrase=0123456789 #sets wpa key management wpa_key_mgmt=WPA-PSK root@lisab:~#

# Para solucionar problema de falta de entropía, error lack of entropy apt install haveged

I bought the RTL8188cus/RTL8192cu-based WIFI adaptor from Adafruit and followed the Adafruit WIFI BeagleBone Tutorial.  I had a similar experience as almost everyone else: it didn't work.  After beating my head against the wall and trying many things here's what I found:

The mainlined kernel driver for the adaptor's chipset (aka rtlwifi) does not work well.

I was able to get it to work, but it was unreliable, especially when changing access points.

Connman, the connection manager used by Angstrom linux, only seems to want one network adaptor in use at a time.  It prefers Ethernet, so if you have an Ethernet cable plugged into your BeagleBone it will cause WIFI not to work.

The Realtek-supplied drivers work great.

Pre-requisites

These instructions are for Angstrom Linux, the distribution that ships with the BeagleBone.  Make sure you are running the latest system image on your BeagleBone. 

These instructions assume you are cross-compiling the driver on another machine (not the beaglebone) and they assume you have the BeagleBone 3.8 Linux kernel building in that environment.  Use these instructions if you want to compile on the BeagleBone.

Go to the directory you have the kernel and run this to ensure it's ready to build modules

make CROSS_COMPILE=arm-linux-gnueabi- ARCH=arm scripts prepare

Steps

Get a binary of the Realtek drivers

Install the driver

Configure your WIFI settings

1) Build the RTL8192 Driver

Note: You can get the pre-patched source code here and a pre-built binary of the driver here.  These may or may not work though, so I would recommend building it yourself.

Download the Unix/Linux driver from the Realtek web site - It will be called something like RTL8192xC_USB_linux_v3.4.4_4749.20121105.zip

Unzip the file and then unpack the driver source which is  driver/tl8188C_8192C_usb_linux_v3.4.4_4749.20121105.tar.gz in the zip file

cp rtl8188C_8192C_usb_linux_v3.4.4_4749.20121105.tar.gz ~/ tar xvfz rtl8188C_8192C_usb_linux_v3.4.4_4749.20121105.tar.gz cd rtl8188C_8192C_usb_linux_v3.4.4_4749.20121105

Download this patch to add BB config and to fix building on linux 3.8 into the driver directory and apply it

wget https://raw.github.com/cmicali/rtl8192cu_beaglebone/master/util/rtl-8192-beaglebone-linux-3.8.patch patch -p1 < rtl-8192-beaglebone-linux-3.8.patch

Build the driver - Replace your_kernel_dir with the root of your BeagleBone 3.8 kernel source (mine is ~/projects/beaglebone_kernel/kernel)

make KSRC=your_kernel_dir

2) Install the RTL8192 Driver

Copy the driver (8192cu.ko) to your beaglebone and then log into it (note: change BeagleBoneBlack2 to the IP/hostname of your beaglebone)

scp 8192cu.ko root@BeagleBoneBlack2:~/ ssh root@BeagleBoneBlack2

Install the driver

mv 8192cu.ko /lib/modules/$(uname -r) depmod -a cd /etc/modules-load.d echo "8192cu" >rtl8192cu-vendor.conf

Blacklist the old rtlwifi drivers 

cd /etc/modprobe.d echo "install rtl8192cu /bin/false" >wifi_blacklist.conf echo "install rtl8192c_common /bin/false" >>wifi_blacklist.conf echo "install rtlwifi /bin/false" >>wifi_blacklist.conf

3) Configure your Access Point

Edit /var/lib/connman/settings and enable WIFI

[global] OfflineMode=false [Wired] Enable=true Tethering=false [WiFi] Enable=true Tethering=false

Encrypt your passphrase

wpa_passphrase YourSSID YourPassphrase

Edit /var/lib/connman/wifi.config and set it to the following

[service_home] Type=wifi Name=YourSSID Passphrase=YourEncryptedPassphrase

Plug in your WIFI adaptor and reboot

shutdown -r 0

Closing Notes

These instructions assume you are using WPA security on your WIFI network

Connman appears to pick up changes to wifi.config almost immediately, so you can usually change WIFI AP/password without rebooting

Optional: I installed the latest version of connman(1.15) - I don't think it's required, but in case you want to install it this how I built it:

./configure --prefix=/usr --exec_prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --libexecdir=/usr/libexec --datadir=/usr/share --sysconfdir=/etc --sharedstatedir=/com --localstatedir=/var --libdir=/usr/lib  --includedir=/usr/include --oldincludedir=/usr/include --infodir=/usr/share/info --mandir=/usr/share/man make make install 

Optional: I also installed the latest version of wpa_supplicant (1.1) - here is the config file i used. Also libnl3-dev needs to be installed to build it

Propeller Head Alert

There are enough tutorials around to follow for how to make a Hot-Spot or an Access Point using your Raspberry Pi so I will not go into the details in this post, however I wanted to have an access point capability without needing an external USB hub to power my wifi USB adaptor, that's right I wanted the RPi to power the wifi adaptor directly.

To achieve this goal I need one of the really small 'nano' wifi USB dongles. The cheap ones around around are often re-branded so its pointless describing using a brand name and model. however the do all use the driver described in dmesg as RTL8192cu and the other mnemonic that is often found is RTL8188CUS; if that's what you have and want to use it along with hostapd to make an access point you will realise there is something not quite right.

To cut along story short I have spent days on getting to locate the fix for this so I figured I would share and it will act as a reference source for myself going forward lest I forget. Credit for this has to go to ESR Labs although they seem so occupied with the Android Transporter that they failed to see a community struggling to find the solution they have provided see their site here.

configure the access point using hostapd as per the tutorial you are using and when you find it does not work as hostapd cannot find a nl80211 compliant device then stop copy this hostapd file from HERE and simply extract it into the same directory as your hostapd binary best to rename the original binary first (a non compressed version can be downloaded from HERE). The directory for the file is typically /usr/sbin make sure you chmod the extracted hostapd file to 755 with owner and group set to root.

Now go to /etc/hostapd/hostapd.conf and comment out the line driver=nl80211 and add line driver=rtl871xdrv

reboot the RPi or at least restart hostapd (sudo service hostapd restart) and you should now have a working access point as long as the tute you are following is a good one :-)

Ciao