Linux BASH shell Script to automatically update TLE files for Predict Software

An automated way for keeping the TLE files up to date

I'm setting up a way for a script to have predict email me the passes of specific satellites, and needed to automate the updating of the TLE files.

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.

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

 

Reference for VHF/UHF amateur radio FM simplex frequencies for 6 Meter / 2 Meter / 1.25 meter / 70cm

I've compiled some suggested channels and frequencies to use on these bands

Try something new, these frequencies should be stored in every HT or mobile.  I enjoy messing around with VHF/UHF radios but repeaters usually bore me.  These frequencies are compiled from the ARRL "official" band plan as well as other forums and sites I have come across over time.

Monday, 10 March 2014 13:56

APRS services

Fun things to do with APRS

Email, Text Message, Callsign lookups, are only a few other things that you can do with APRS.

GPS tracking is a well known use for APRS, but there are many other things you can do with your radio and using the APRS network.  I've just started experimenting with APRS with my Kenwood TH-D72a HT dual band radio and wanted to document a few things I've been playing with.

Sunday, 09 March 2014 01:23

Send email with APRS

Using a Kenwood TH-D72a HT to send and receive email via APRS

There are several ways to send an email using the APRS network.  In these examples I am using a Kenwood TH-D72A HT radio that has a built in TNC but you can certainly use this information to send emails using whatever APRS setup that works for you.

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