dmesg
ifconfig

sudo nano /etc/modprobe.d/8192cu.conf
Inhalt:
options 8192cu rtw_power_mgnt=0 rtw_enusbss=0

sudo iwlist wlan0 scan
sudo ifdown wlan0
sudo ifup wlan0
ip addr

http://www.maketecheasier.com/set-up-raspberry-pi-as-wireless-access-point/

###wpa-supplicant###
sudo iwlist wlan0 scan
sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
Add at bottom:
network={
    ssid="The_ESSID_from_earlier"
    psk="Your_wifi_password"
}

wpa-supplicant shpuld notice change and try to connect, else try:
sudo ifdown wlan0
sudo ifup wlan0
or:
sudo reboot

ifconfig wlan0
https://www.raspberrypi.org/documentation/configuration/wireless/wireless-cli.md




###Direct config###
https://www.datenreise.de/raspberry-pi-wlan-einrichten-edimax/

sudo nano /etc/network/interfaces

Inhalt:
auto lo
iface lo inet loopback
iface eth0 inet dhcp

auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-ap-scan 1
wpa-scan-ssid 1
wpa-ssid "DEIN-WLAN-NAME"
wpa-psk "DEIN-WLAN-SCHLÜSSEL"


sudo service networking restart



Content bei gewünschter static ip zuweisung im netzwerk:

auto lo
iface lo inet loopback

iface eth0 inet static
address 192.168.0.24
netmask 255.255.255.0
gateway 192.168.0.1

auto wlan0
allow-hotplug wlan0
iface wlan0 inet static
address 192.168.0.23
netmask 255.255.255.0
gateway 192.168.0.1
wpa-ap-scan 1
wpa-scan-ssid 1
wpa-ssid "DEIN-WLAN-NAME"
wpa-psk "DEIN-WLAN-SCHLÜSSEL"