Algis Salys

Algis Salys

Creator and owner of algissalys.com.  Linux enthusiast, electronics tinkerer, and likes to spend time in the workshop building and creating new projects.

Tuesday, 08 September 2015 12:15

Passive packet sniffing on Wifi connections

Wireshark, tcpdump, and dumpcap are packet sniffers we use to passively do some some wifi sniffing with Kali linux

We'll cover the basics and complete the captures.

This guide is specifically for Kali linux but you can use other versions of linux with minor modifications and/or manually installing some of the software tools needed.

Reference to using the command line in linux to compress and optimize all of your png, tiff, bmp, and gif image files

I needed a lossless compression tool, one that I can run in the command line and easily optimize all images in an entire directory.

I found Optipng which is a small command line program that can easily be installed and compress full directories quickly and efficiently without any noticeable loss in image quality.

Reference to using the command line in linux to convert, modify, rename, scale and size all images in a directory path quickly and efficiently.

I needed a way to easily modify, resize, and rename images while creating this website.

I primarily use gimp for my image editing, and although there are batch conversion add-ons to do it through the gui, for tasks such as renaming, scaling to different sizes, and converting file formats, I prefer to do it via the command line for quicker results.

Quickly setup multiple wifi connections on your raspberry pi through the command line

Step by step illustrated guide showing you how to setup your wireless connection if you only have access to the terminal

Setting it up using just the /etc/network/interfaces files can work but you will run into issues when you need multiple connections or if you ever do access the desktop environment.  Setting it up using wpa supplicant will be more reliable in the long run.

Using Win32DiskImager to write a Raspberry Pi image to your SD Card in Windows

Step by step to get your Raspberry Pi up and running by downloading and image and writing it to your SD card

Things you'll need

  • Windows PC/Laptop with and SD card reader
  • Win32DiskImager software (method 1)
  • Raspberry Pi Disk Image
  • SD Card (minimum 4GB)

Using Method 1- Win32DiskImager is a little bit easier of a method, but using Method 2 - DD is powerful and can fix corrupted SD cards or those SD cards that maybe unreadable in windows.

Manually populating your address book with the IP addresses of Crestron devices on your network

Items Needed:

  • Laptop
  • Crestron toolbox and supplementary files installed on your laptop (Crestron Login account required) http://www.crestron.com

Using device discovery to automatically populate your address book with the IP addresses of Crestron devices on your network

This option is only possible if you are on the same network as your Crestron devices, if not goto Add devices manually

Items Needed:

  • Laptop
  • Crestron toolbox and supplementary files installed on your laptop (Crestron Login account required) http://www.crestron.com
  • Network CAT5 cable

Uploading compiled files to processors and touch panels using Crestron toolbox

Here are some simple steps to connect to a crestron system and load compiled files to the processor and touch panels

Items Needed:

  • Laptop
  • Crestron toolbox and supplementary files installed on your laptop (Crestron Login account required) http://www.crestron.com
  • USB to Serial adapter or Network CAT5 cable (depending on your processor connectivity)
  • Pre-compiled code to load into the processor or touch panel

 

Sunday, 20 September 2015 15:58

Altoids Tin dual 24 hour clock project build

Homebrew Altoids Tin DIY build of a dual 24 Hour clock, 1 for local time, and 1 for UTC time.

A quick an easy project, that takes very little time to complete.

What hasn't been stuffed in an altoids tin?  Like most tinkerer's, I too have strong curiously strong desires to stuff as many possible projects into these minty fresh boxes as humanly possible.  24 hour dual time zone clock is what I stuffed into one here.

Building a receive only iGate using MultimonNG, RTL SDR dongle and a Raspberry Pi

I noticed multimonNG can use an inexpensive RTL SDR dongle (which I have) and decode APRS packets and send them off to the APRS-IS network.

I've been wanting to build some sort of iGate for APRS for some time, and eventually I'd like to include transmit capabilities possibly using a cheap Baofung UV-5R, but doing some research the multimonNG software caught my eye.

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