Electrons and bits

Thursday, May 12, 2016

Bluetooth ICs comparison

Here's a comparison of some Bluetooth SOCs:

STM32 microncontrollers comparison

Digikey link

source: STMicroelectronics

Mainstream

High performance

Ultra low power

Friday, January 29, 2016

How to run Kali 2 on RPi2

(source)
You need a microSD that's at least 8GB

Download the image here : https://www.offensive-security.com/kali-linux-arm-images/
Download Win32 Disk Imager : http://sourceforge.net/projects/win32diskimager
Download 7-zip if you don't have it : 7-zip.org
Extract the image with 7-zip
Use Win32 Disk Imager to install the img on the microSD card

The default username and password is 'root' and 'toor'

Set a static IP address (source)
If you want to use your Pi with ssh it's better is you set a static IP address.

nano /etc/network/interfaces

Modify the eth0 part so it's like this:

auto eth0
iface eth0 inet static

address 192.168.0.99
netmask 255.255.255.0
broadcast 192.168.0.255

restart connection (don't do it from ssh on eth0 cause you will lose the connection)
ifdown eth0
ifup eth0

Done! Now you can login with ssh

Install wifite

Wifite is a tool to test the security of WiFi networks
apt-get update
apt-get install wifite

Install Raspi-config

With raspi-config you can extend the partition size so that you use the entire uSD card.

apt install alsa-utils
wget http://archive.raspberrypi.org/debian/pool/main/r/raspi-config/raspi-config_20160108_all.deb
wget http://http.us.debian.org/debian/pool/main/l/lua5.1/

lua5.1_5.1.5-7.1_armhf.deb

wget http://http.us.debian.org/debian/pool/main/t/triggerhappy/triggerhappy_0.3.4-2_armhf.deb
dpkg -i triggerhappy_0.3.4-2_armhf.deb
dpkg -i

lua5.1_5.1.5-7.1_armhf.deb

dpkg -i raspi-config_20160108_all.deb

raspi-config manual

Run raspi-config and extend the uSD card partition size.

WiFi commands

Scan WiFi networks

iwlist wlan0 scan

Scan WiFi networks and only show the SSID

iwlist wlan1 scan | grep SSID

Turn the WiFi adapter on or off

ifconfig wlan0 up

ifconfig wlan0 down

Connect to WEP WiFi network from terminal

iwconfig wlan0 essid NAME key PASSWORD
dhclient wlan0

Connect to WPA WiFi network from terminal
(source)

First you need to install wpasupplicant.

apt-get install wpasupplicant

Turn the WiFi on
ifconfig wlan0 up

wpa_passphrase NETWORKSSID > wpa.conf
then enter password

wpa_supplicant -B -Dwext -iwlan0 -c/wpa.conf

dhclient -r
dhclient wlan0

Wifite

(source)

wifite
Ctrl-C to stop scanning and start hacking
enter target number and press enter

When hacking WPS enable routers:
Step 1: Pixie dust attack
list of vulnerable routers

Step 2:Brute force
can take a long time

Step 3:Handshake capture
If wifite succeeds at getting the handshake, you have to crack it to get the password
To do so, you can use cowpatty or aircrack-ng.
to be continued...

nmap

(source1) (source2)

nmap is used to scan your network.

To list all devices on the network
nmap -sP 192.168.0.0/24

Find the OS of a device
nmap -O 192.168.0.99

Useful linux commands

Related to files

MOVE

mv path path

COPY

cp path path

REMOVE

rm file

rm -r folder

UNTAR

tar -xvzf file.tar.gz

tar -xvjf file.tar.tbz

or install dtrx

REDIRECT

> redirects stdout to file and overwrites

>> redirects stdout to file and appends

< redirects stdin to a command

PIPE

| gives the output of a command as input to another command

LIST FOLDERS

ls -d */

LIST FILES WITH SIZE

ls -lhS

FIND FILE

find -iname "filename"

GREP

find text in file/text

dpkg --list | grep PACKAGE

case insensitive

grep -i ...

find text in files

grep -R wordtofind /home/luke

SORT

sort text.txt > sorted-text.txt

UNIQ

uniq text.txt > uniq-text.txt

REPLACE TEXT

replace only first occurrence on each line

sed 's/texttofind/textreplace/' text.txt

replace all (add g)

sed 's/texttofind/textreplace/g' text.txt

REMOVE A LINE IF CONTAINS PATTERN

awk '!/patterntofind/' file1 > file2

sed '/patterntofind/d' ./file1 > ./file2

Related to disks

MOUNT

sudo mount -t vfat /dev/sdb1 /media (FAT)

sudo mount /dev/sdb1 /media (ext)

sudo mount -t ntfs /dev/sdb1 /mnt/drive (NTFS)

UNMOUNT

sudo umount /path

AVAILABLE SPACE

df -Bm

LIST PARTITONS (needs parted)

sudo parted

print all

CLONE A DISK

sudo dd if=/dev/sdb of=/dev/sdc bs=4096 conv=notrunc,noerror

WRITE AN IMAGE ON A DISK

sudo dd if=sdcard.img of=/dev/sdb

Related to the computer

AVAIL RAM

free -m

CPU USAGE

top

GET CPU INFO

cat /proc/cpuinfo

CHECK BATTERY POWER

cat /sys/class/power_supply/BAT0/power_now

LIST DRIVERS

lsmod

GET DRIVER INFO

modinfo MODULE

GET ENV INFO

env

LIST USB DEVICES

lsusb

GET CPU TEMP

Raspberry Pi

vcgencmd measure_temp

cat /sys/class/thermal/thermal_zone0/temp

Related to packages

LIST INSTALLED PACKAGES (with version and info)

dpkg --list | grep PACKAGE

INSTALL DEB PACKAGE

sudo dpkg -i PACKAGE

sudo apt-get install -f

DOWNLOAD A GIT FOLDER

git clone <url>

Related to network

LIST NETWORK ADAPTERS

ifconfig

LIST WIFI ADAPTERS

iwconfig

SCAN WIFI

iwlist wlan0 scan

CONNECT TO WPA WIFI

wpa_passphrase NETWORKSSID > wpa.conf
then enter password

sudo wpa_supplicant -B -Dwext -iwlan0 -c wpa.conf

sudo dhclient -r

sudo dhclient wlan0

Thursday, January 28, 2016

OSMC on Raspberry Pi

(This page is a work in progress)

If you want to play or stream movies and TV shows or watch Youtube with a Raspberry Pi, the easiest way is to install OSMC. The Raspberry Pi has a HDMI connector so you can easily connect it to your TV.

1. First get a microSD card (Raspberry Pi 2) or SD card (Raspberry Pi) of at least 4GB.
2. Download the installer and follow the steps until you have your SD card ready:
https://osmc.tv/download/
3. Put the SD card in the Raspberry Pi and connect the micro USB connector to power it on.

Now it's time to get some movies and install some apps.

Note: For the power supply I recommend using one that can supply 2A. If you only have a 1A power supply it will work but if you connect a lot of things maybe you won't have enough power. Also, the USB cable is important. If it's too long or if it's not rated for high current, the voltage drop in the cable will be so high that the Pi won't be able to work. If you see a multi-color square in the top right corner, that means the voltage on the Pi is too low.

How to add movies to the library

The easiest is to have a hard drive connected to the Pi. Before you do that you need to know that most hard drives need more current than what the Pi can supply.

Go to My OSMC (in programs)

Pi Config

add max_usb_current=1 (it is not usb_max_current=1)

Done, write

Even with that activated, I had the undervoltage rainbow square in the corner of my TV. That means the voltage drops due to too much current. My cable had 2 USB connectors so I taped the 5V pin on the one going to the Pi and connected the other one to a 5V USB adapter.

How to name files so they appear in the library

source: http://kodi.wiki/view/Video_management

For movies :

\Movies\Avatar (2009)\somefilename.mkv
\Movies\The Usual Suspects (1995)\somefilename.avi

For TV shows :

TV Shows                 
   |----TV Show 1
   |       |----Season #
   |            |--Files

Then for every episode:

: Show with season; anything_s01e02.ext; anything_s1e2.ext; anything_s01.e02.ext; anything_s01_e02.ext; anything_1x02.ext; anything_102.ext

Show without season

anything_ep02.ext

anything_ep_02.ext

for mini-series or short documentary series.

anything_part.II.ext

anything_pt.II.ext

anything_pt_II.ext

How to stream movies and TV shows

With Genesis you can stream movies and TV shows.

Download and unzip the file in ../home/osmc/.kodi/userdata/addon_data
http://iwillfolo.com/wordpress/wp-content/uploads/download_dir/plugin.video.genesis/plugin.video.genesis-5.1.4.zip

Link Genesis library with OSMC library

Make a shortcut of this path in OSMC home folder :
../home/osmc/.kodi/userdata/addon_data/plugin.video.genesis/TVShows

Then go to Movies->Files->Add Source and add the shortcut.

How to control OSMC from your computer or phone

First, you need to give a static IP address to your Pi so that the apps don't need to be configured again every time you reboot your Pi.

Go to My Osmc - Network and configure network manually

To control OSMC with your phone, install Yatse:
https://play.google.com/store/apps/details?id=org.leetzone.android.yatsewidgetfree&hl=en

To control OSMC with Google Chrome, install Play to Kodi:
https://chrome.google.com/webstore/detail/play-to-kodi/fncjhcjfnnooidlkijollckpakkebden?hl=en

How to download torrents

If you have a hard drive connected to your Pi you can turn it into a torrent machine!

Follow this tutorial :
http://codeyarns.com/2014/07/05/how-to-torrent-on-raspbmc-using-transmission/

Some useful info about OSMC

-Default username and password is osmc and osmc

-To go to the terminal exit osmc (not reboot) and press Escape

-If OSMC is playing something, hitting backspace returns to the menu and hitting Tab will go back to what's playing.