65 lines
2.7 KiB
Markdown
65 lines
2.7 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 only supports RTL-SDR, but other SDR hardware may be easily added.
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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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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 8888 for the I/Q source,
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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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I would like to maintain a list of online amateur radio receivers on <a href="http://openwebrx.org/">openwebrx.org</a>.
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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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## Configuration tips
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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`, or you may get a WebSocket error.
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DSP CPU usage can be fine-tuned in `plugins/dsp/csdr/plugin.py`: you can set transition bandwidths higher (thus degrade filter performance by decreasing the length of the kernel, but also decrease CPU usage), and also set `fft_size` lower.
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If you constantly get *audio overrun* errors, you may change `audio_buffer_maximal_length_sec` in `openwebrx.js` from the default 1.7 to 3.
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If you want a chat-box to the top of the page, <a href="https://gist.github.com/ha7ilm/15c4c5e4c80cef9b3144">here is a snippet</a> for you to include in `config_webrx.py`.
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## Todo
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Currently, clients use up a lot of bandwidth. This will be improved later.
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