Welcome to OsmoSDR

OsmoSDR is a 100% Free Software based small form-factor inexpensive SDR (Software Defined Radio) project.

If you are familiar with existing SDR receivers, then OsmoSDR can be thought of something in between a FunCube Dongle (only 96kHz bandwidth) and a USRP (much more expensive). For a very cheap SDR (with limited dynamic range), you can use the DVB-T USB stick using the RTL2832U chip, as documented in rtl-sdr.

It consists of a USB-attached Hardware, associated Firmware as well as GrOsmoSDR gnuradio integration on the PC.

The first generation hardware (1.2 MS/s) is available to interested developers from

We are currently doing a re-design for the second-generation hardware, featuring higher sample rate and other goodies.

Update on next version of OmoSDR

Christian has posted a detailed status update to the osmocom-sdr mailing list, describing his progress with enhancing the sample rate from 500 kS/s to 4 MS/s (at 14 bits ADC). Also, some impedance mismatch between tuner and ADC was fixed.

The benefits of this are not only available to the users/customers of the next generation hardware, but the ...

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GNSS-SDR officially supports rtl-sdr

The team of developers of the open source project GNSS-SDR proudly announces that the latest version of our GNSS receiver supports the realtime operation using RTL-SDR compatible dongles.

They achieved GPS position fix with what is probability the cheapest GPS receiver ever made. If you have a RTL2832U based compatible DVB-T receiver you can ...

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First 16 OsmoSDR boards available for developers

There are something like 16 units of OsmoSDR that we have produce and which are able to sell to interested developers.

However, as there are only 16 units right now, and as the firmware and host software is in a barely usable but incomplete state, we would like to make sure that those 16 units get sold to people who actually have an interest (a ...

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Introducing RTL-SDR

While the OsmoSDR is still not available, some Osmocom team members (notably Steve Markgraf) have been hacking away on an alternative least-cost solution: rtl-sdr.

So what is rtl-sdr? It is a creative form of using consumer-grade DVB-T USB receivers, turning them into fully-fledged software defined radios.

Those ...

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OsmoSDR hardware verification at 28C3

At 28c3, the OsmoSDR team was busy verifying the hardware design on the first prototypes.

The result can be summarized as:

  • SAM3U is working, enumerates on USB and can be programmed via SAM-BA
  • E4K tuner driver is working
  • Si570 driver is working
  • FPGA can be flashed via JTAG bit-banging from SAM3 ...

(Read more)

Hardware schematics and firmware source code are kept in a git repository on

For a complete list of local wiki pages, see TitleIndex.


This is a (slightly better) picture of the current developer preview:

OsmoSDR developer preview

Mailing List

We discuss both OsmoSDR as well as rtl-sdr on the following mailing list: osmocom-sdr@…. You can subscribe and/or unsubscribe via the following link:


Last modified 4 months ago Last modified on Jan 4, 2014, 4:38:14 AM

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