89 lines
4.5 KiB
Markdown
89 lines
4.5 KiB
Markdown
OpenWebRX
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=========
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OpenWebRX is a multi-user SDR receiver software with a web interface.
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It has the following features:
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- <a href="https://github.com/simonyiszk/csdr">libcsdr</a> based demodulators (AM/FM/SSB),
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- filter passband can be set from GUI,
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- waterfall display can be shifted back in time,
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- it extensively uses HTML5 features like WebSocket, Web Audio API, and <canvas>.
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- it works in Google Chrome, Chromium (above version 37) and Mozilla Firefox (above version 28),
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- currently supports RTL-SDR and HackRF; other SDR hardware may be easily added.
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**News (2015-08-18)**
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- My BSc. thesis written on OpenWebRX is <a href="http://openwebrx.org/bsc-thesis.pdf">available here.</a>
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- Several bugs were fixed to improve reliability and stability.
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- OpenWebRX now supports compression of audio and waterfall stream, so the required network uplink bandwidth has been decreased from 2 Mbit/s to about 200 kbit/s per client! (Measured with the default settings. It is also dependent on `fft_size`.)
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- OpenWebRX now uses <a href="https://github.com/simonyiszk/csdr#sdrjs">sdr.js</a> (*libcsdr* compiled to JavaScript) for some client-side DSP tasks.
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- Receivers can now be listed on <a href="http://sdr.hu/">SDR.hu</a>.
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- License for OpenWebRX is now Affero GPL v3.
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**News (2016-02-14)**
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- The DDC in *csdr* has been manually optimized for ARM NEON, so it runs around 3 times faster on the Raspberry Pi 2 than before.
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- Also we use *ncat* instead of *rtl_mus*, and it is 3 times faster in some cases.
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- OpenWebRX now supports URLs like: `http://localhost:8073/#freq=145555000,mod=usb`
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- UI improvements were made, thanks to John Seamons and Gnoxter.
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> When upgrading OpenWebRX, please make sure that you also upgrade *csdr*, and install the new dependency, *ncat*!
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## OpenWebRX servers on SDR.hu
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[SDR.hu](http://sdr.hu) is a site which lists the active, public OpenWebRX servers. Your receiver [can also be part of it](http://sdr.hu/openwebrx), if you want.
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## Setup
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OpenWebRX currently requires Linux and python 2.7 to run.
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First you will need to install the dependencies:
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- <a href="https://github.com/simonyiszk/csdr">libcsdr</a>
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- <a href="http://sdr.osmocom.org/trac/wiki/rtl-sdr">rtl-sdr</a>
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- ncat (On Debian/Ubuntu, it is in the *nmap* package).
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> By the way, *nmap* is a tool commonly used for auditing network security, and it is not used by OpenWebRX in any way. We need to install it, because the *ncat* command is packaged with it.
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>
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> *ncat* is a better *netcat* alternative, which is used by OpenWebRX for internally distributing the I/Q data stream. It also solves the problem of having different versions of *netcat* on different Linux distributions, which are not compatible by their command-line arguments.
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After cloning this repository and connecting an RTL-SDR dongle to your computer, you can run the server:
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python openwebrx.py
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You can now open the GUI at <a href="http://localhost:8073">http://localhost:8073</a>.
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Please note that the server is also listening on the following ports (on localhost only):
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- port 4951 for the multi-user I/Q server.
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Now the next step is to customize the parameters of your server in `config_webrx.py`.
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Actually, if you do something cool with OpenWebRX (or just have a problem), please drop me a mail:
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*Andras Retzler, HA7ILM <randras@sdr.hu>*
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## Usage tips
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You can zoom the waterfall display by the mouse wheel. You can also drag the waterfall to pan across it.
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The filter envelope can be dragged at its ends and moved around to set the passband.
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However, if you hold down the shift key, you can drag the center line (BFO) or the whole passband (PBS).
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## Setup tips
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If you have any problems installing OpenWebRX, you should check out the <a href="https://github.com/simonyiszk/openwebrx/wiki">Wiki</a> about it, which has a page on the <a href="https://github.com/simonyiszk/openwebrx/wiki/Common-problems-and-their-solutions">common problems and their solutions</a>.
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Sometimes the actual error message is not at the end of the terminal output, you may have to look at the whole output to find it.
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If you want to run OpenWebRX on a remote server instead of *localhost*, do not forget to set *server_hostname* in `config_webrx.py`.
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## Licensing
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OpenWebRX is available under Affero GPL v3 license (<a href="https://tldrlegal.com/license/gnu-affero-general-public-license-v3-(agpl-3.0)">summary</a>).
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OpenWebRX is also available under a commercial license on request. Please contact me at the address *<randras@sdr.hu>* for other licensing options.
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