WLAN Pi and Comfast CF-912AC Adapter

You can use the Comfast CF-912AC adapter as a Wifi adapter on the nanopi

Assuming there is a DHCP server running on your network, SSH to the IP indicated on the screen

Log in to the wlanpi

username:      wlanpi
password:       wlanpi

I normally run as root so I do not have to always elevate

 _   _ ____  _   _   _              ____
| \ | |  _ \(_) | \ | | ___  ___   |___ \
|  \| | |_) | | |  \| |/ _ \/ _ \    __) |
| |\  |  __/| | | |\  |  __/ (_) |  / __/
|_| \_|_|   |_| |_| \_|\___|\___/  |_____|

Welcome to Debian Stretch with Armbian Linux 4.19.66-sunxi64
System load:   0.24 0.12 0.09   Up time:       39 min
Memory usage:  20 % of 993MB    IP:            192.168.16.113
CPU temp:      38°C
Usage of /:    21% of 15G

[ Menu-driven system configuration (beta): sudo apt update && sudo apt install armbian-config ]

Last login: Thu Oct 31 17:22:28 2019 from 192.168.16.101

wlanpi@wlanpi:~$

sudo su
wlanpi

I prefer to navigate to the webserver downloads folder so that I can easily pull the file from the device

cd /var/www/html/downloads

Determine how the adapter is named in your device

root@wlanpi:/var/www/html/downloads# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 10000
    link/ether 02:01:5b:1b:4c:86 brd ff:ff:ff:ff:ff:ff
    inet 192.168.16.113/24 brd 192.168.16.255 scope global eth0
       valid_lft forever preferred_lft forever
3: usb0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
    link/ether 7e:60:c2:c2:98:66 brd ff:ff:ff:ff:ff:ff
    inet 192.168.42.1/27 brd 192.168.42.31 scope global usb0
       valid_lft forever preferred_lft forever
4: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ieee802.11/radiotap 40:a5:ef:4f:11:f6 brd ff:ff:ff:ff:ff:ff
root@wlanpi:/var/www/html/downloads#

The adapter shows up as wlan0 in this example

Determine which channel you would like to capture

Select the channel of the wlan0 interface by entering the following command based upon the channel

iwconfig wlan0 channel 60

Now we can use tcpdump to capture on this channel

tcpdump -i wlan0 -w wlan0-60.pcap

Open a browser and navigate to the ip of the wlanpi

Click on Downloads

Open your pcap file

To remove the files off the wlanpi, use the rm command. Be careful with this command

root@wlanpi:/var/www/html/downloads# ls
iPerf  SSH_client  Wireshark  wlan0-1.pcap  wlan01.pcap  wlan0-36.pcap  wlan0-60.pcap  wlan06.pcap  wlan0.pcap
root@wlanpi:/var/www/html/downloads# rm wlan0-1.pcap  wlan01.pcap  wlan0-36.pcap  wlan0-60.pcap  wlan06.pcap  wlan0.pcap
root@wlanpi:/var/www/html/downloads# ls
iPerf  SSH_client  Wireshark
root@wlanpi:/var/www/html/downloads#

Starting Kismet

Disabled Kismet from running at startup, can now be launched from the front panel menu or from shell by typing kismet

Adding Drivers for Proxim 8494

The wlanpi needs to download the drivers using the following command

apt-get install firmware-linux-free

Insert your Atheros AR9170 devices (carl9170) device into the wlanpi

Run this command to determine if wlan0 interface is present

root@wlanpi:/home/wlanpi# iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

usb0      no wireless extensions.

wlan0     IEEE 802.11  Mode:Monitor  Frequency:2.412 GHz  Tx-Power=30 dBm
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

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