A guide to simplify the installation of drivers and software for an RTL-SDR in Linux.
https://drive.google.com/file/d/1zvpg5ay11emkd9-_jLtZOkHlLUrDHfUn/view?usp=sharing
Showing posts with label linux. Show all posts
Showing posts with label linux. Show all posts
Wednesday, June 9, 2021
RTL_433 for Linux Mint Quick Start Guide
RTL_433 is a command line Linux tool to decode ISM band gizmos like remote temperature and humidity sensors with an SDR. These signals are transmitted around 433 MHz and are not encrypted but they are digital. RTL_433 handles both the reception and decoding of these signals. No other apps are required for use other than a web browser for a GUI display. RTL_433 was developed by Benjamin Larsson and the source code is available at https://github.com/merbanan/rtl_433
The focus of this guide is establishing basic functionality under Linux Mint 19.3 with an RTL-SDR Version 3 dongle. Operation under other distributions and SDR's will be similar yet beyond the scope of this guide to cover them all. I'll assume you've already installed the drivers and have a working SDR dongle. If not, see my guide RTL-SDR Quick Start Guide for Linux.
Install needed libraries. The system will indicate if they're already installed and nothing will be over-written.
sudo apt-get install libtool libusb-1.0-0-dev librtlsdr-dev rtl-sdr build-essential cmake pkg-config
Get the source code.
git clone https://github.com/merbanan/rtl_433.git
Build & install rtl_433.
cd rtl_433/
mkdir build
cd build
cmake ..
make
make install
Open a terminal and do one of the following:
rtl_433 (default mode with auto gain)
rtl_433 -C customary (displays temp in F)
rtl_433 -C customary -F http (as above plus enables web server)
Open a browser and enter localhost:8433 It will take you to the developers website https://triq.org/rxui/#localhost:8433 to format and display the data. Yes, they're legit. :)
I did some experimenting with gain and bandwidth settings and found the defaults to be just as good. Results will vary based on how many sensors are in your neighborhood, interference, etc. The output power is pretty low on these devices so range is maybe 100' at best. A 1/4 wave ground-plane or telescoping antenna about 6.5" long works well. I created a bash script to quickly start the app without needing to remember switches.
For more documentation and related projects see the https://triq.org/ site.
-Ken
Wednesday, July 31, 2013
Rainbow Lake Pinetop-Lakeside Arizona
A view from the East shore of Rainbow Lake in Pinetop-Lakeside Arizona.
Photographer: Ken Ranous
Date: July 29th 2013
Camera: Olympus e-volt e500 Zuiko 14-45 lense
Post Processing: Darktable in Linux Mint All Open Source Workflow.
Photographer: Ken Ranous
Date: July 29th 2013
Camera: Olympus e-volt e500 Zuiko 14-45 lense
Post Processing: Darktable in Linux Mint All Open Source Workflow.
Tuesday, April 16, 2013
Open Source Image Processing
One of the most important tasks I do on a PC process photos. F-Spot served me well for quite awhile, as did Shotwell. Gimp in combination with ufraw picks does better in terms of advanced editing, but at the sacrifice of management and ratings functions. None of them is really a direct linux replacement for Adobe Lightroom or Photoshop Elements. I modified my work flow to match the features of the tools available, but a recent update to Shotwell causes exported images to be distorted, either stretched horizontally or vertically. I needed a fix, so off to the search engines ...
A few hours later, I was up and running with a new photo manager called Darktable. http://www.darktable.org. The included features are pro and performance is quick even on a modest machine. If you're looking for one application to manage and process your photos this is it. Just create your own folder tree as YOU see fit, then import and instead of wasting disk space copying and duplicating files, it only makes a database of the images and any pending edits you're selected. Only upon exporting are these changes committed, this is about non-destructive editing of the original.
Some features found in version 1.2:
Be sure to visit their website for instructions on adding to your software sources as the version presented in Package Manager by default is dated.
A few hours later, I was up and running with a new photo manager called Darktable. http://www.darktable.org. The included features are pro and performance is quick even on a modest machine. If you're looking for one application to manage and process your photos this is it. Just create your own folder tree as YOU see fit, then import and instead of wasting disk space copying and duplicating files, it only makes a database of the images and any pending edits you're selected. Only upon exporting are these changes committed, this is about non-destructive editing of the original.
Some features found in version 1.2:
- Levels
- Curves
- White Balance
- Crop
- Straighten
- Noise Reduction
- Blending Mode
- Geotagging
- Handles most RAW formats
- Handles 8 or 16 bit formats
- HDR High Dynamic Range
- Releases for popular distros of Linux and OSXand many many more
Be sure to visit their website for instructions on adding to your software sources as the version presented in Package Manager by default is dated.
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