Rtl-sdr » History » Version 107
steve-m, 02/19/2016 10:51 PM
1 | 1 | steve-m | [[PageOutline]] |
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2 | = rtl-sdr = |
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3 | |||
4 | 30 | horiz0n | DVB-T dongles based on the Realtek RTL2832U can be used as a cheap SDR, since the chip allows transferring the raw I/Q samples to the host, which is officially used for DAB/DAB+/FM demodulation. The possibility of this has been discovered by the V4L/DVB kernel developer [http://thread.gmane.org/gmane.linux.drivers.video-input-infrastructure/44461/focus=44461 Antti Palosaari]. |
5 | 1 | steve-m | |
6 | == Specifications == |
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7 | |||
8 | 83 | horiz0n | The RTL2832U outputs 8-bit I/Q-samples, and the highest theoretically possible sample-rate is 3.2 MS/s, however, the highest sample-rate without lost samples that has been tested so far is 2.8 MS/s. The frequency range is highly dependent of the used tuner, '''dongles that use the Elonics E4000 offer the widest possible range (64 - 1700 MHz with a gap from approx. 1100 - 1250 MHz)'''. When used out-of-spec, a tuning range of approx. 50 MHz - 2.2 GHz is possible (with gap). |
9 | 1 | steve-m | |
10 | == Supported Hardware == |
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11 | |||
12 | 45 | horiz0n | The following devices are known to work fine with RTLSDR software: |
13 | 1 | steve-m | |
14 | 43 | steve-m | ||'''VID'''||'''PID'''||'''tuner'''||'''device name'''|| |
15 | 42 | Hoernchen | ||0x0bda||0x2832||all of them||Generic RTL2832U (e.g. hama nano)|| |
16 | ||0x0bda||0x2838||E4000||ezcap USB 2.0 DVB-T/DAB/FM dongle|| |
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17 | ||0x0ccd||0x00a9||FC0012||Terratec Cinergy T Stick Black (rev 1)|| |
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18 | 49 | Hoernchen | ||0x0ccd||0x00b3||FC0013||Terratec NOXON DAB/DAB+ USB dongle (rev 1)|| |
19 | 42 | Hoernchen | ||0x0ccd||0x00d3||E4000||Terratec Cinergy T Stick RC (Rev.3)|| |
20 | ||0x0ccd||0x00e0||E4000||Terratec NOXON DAB/DAB+ USB dongle (rev 2)|| |
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21 | ||0x185b||0x0620||E4000||Compro Videomate U620F|| |
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22 | ||0x185b||0x0650||E4000||Compro Videomate U650F|| |
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23 | ||0x1f4d||0xb803||FC0012||GTek T803|| |
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24 | ||0x1f4d||0xc803||FC0012||Lifeview LV5TDeluxe|| |
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25 | ||0x1b80||0xd3a4||FC0013||Twintech UT-40|| |
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26 | ||0x1d19||0x1101||FC2580||Dexatek DK DVB-T Dongle (Logilink VG0002A)|| |
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27 | ||0x1d19||0x1102||?||Dexatek DK DVB-T Dongle (MSI DigiVox mini II V3.0)|| |
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28 | ||0x1d19||0x1103||FC2580||Dexatek Technology Ltd. DK 5217 DVB-T Dongle|| |
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29 | ||0x0458||0x707f||?||Genius TVGo DVB-T03 USB dongle (Ver. B)|| |
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30 | ||0x1b80||0xd393||FC0012||GIGABYTE GT-U7300|| |
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31 | ||0x1b80||0xd394||?||DIKOM USB-DVBT HD|| |
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32 | ||0x1b80||0xd395||FC0012||Peak 102569AGPK|| |
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33 | ||0x1b80||0xd39d||FC0012||SVEON STV20 DVB-T USB & FM|| |
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34 | 14 | steve-m | |
35 | 57 | Hoernchen | If you don't know where to buy one or if you are just looking for a trustworthy source, try http://shop.sysmocom.de/products/eztv668-bulk |
36 | 38 | Hoernchen | |
37 | 31 | horiz0n | People over at reddit [http://www.reddit.com/r/RTLSDR/comments/s6ddo/rtlsdr_compatibility_list_v2_work_in_progress/ are collecting a list (v2)] of other devices that are compatible. |
38 | 2 | steve-m | |
39 | 30 | horiz0n | Other dongles based on the RTL2832U might be added in the future as well. |
40 | 5 | steve-m | |
41 | This is the PCB of the ezcap-stick:[[br]][[br]] |
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42 | [[Image(ezcap_top.jpg,50%)]][[br]] |
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43 | More pictures can be found [http://www.steve-m.de/pictures/rtl-sdr/ here]. |
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44 | 2 | steve-m | |
45 | == Software == |
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46 | |||
47 | rtl-sdr is a commandline tool that can initialize the RTL2832, tune to a given frequency, and record the I/Q-samples to a file. |
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48 | |||
49 | The code can be checked out with: |
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50 | {{{ |
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51 | git clone git://git.osmocom.org/rtl-sdr.git |
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52 | }}} |
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53 | 35 | horiz0n | |
54 | 1 | steve-m | It can also be browsed on http://cgit.osmocom.org/cgit/rtl-sdr/ |
55 | 45 | horiz0n | |
56 | 48 | horiz0n | If you are going to "fork it on github" and enhance it, please contribute back and submit your patches to: osmocom-sdr at lists.osmocom.org |
57 | 1 | steve-m | |
58 | 56 | horiz0n | A [http://cgit.osmocom.org/cgit/gr-osmosdr/ GNU Radio source block] for [http://sdr.osmocom.org/trac/ OsmoSDR] '''and rtlsdr''' is available. '''Please install a recent gnuradio (>= v3.5.3) in order to be able to use it.''' |
59 | 41 | horiz0n | |
60 | 1 | steve-m | === Building the software === |
61 | |||
62 | 27 | horiz0n | ==== rtlsdr library & capture tool ==== |
63 | 1 | steve-m | |
64 | 29 | horiz0n | '''You have to install development packages for libusb1.0''' and can either use cmake or autotools to build the software. |
65 | 27 | horiz0n | |
66 | Please note: prior pulling a new version from git and compiling it, please do a "make uninstall" first to properly remove the previous version. |
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67 | |||
68 | 19 | steve-m | Building with cmake: |
69 | {{{ |
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70 | 1 | steve-m | cd rtl-sdr/ |
71 | 20 | horiz0n | mkdir build |
72 | cd build |
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73 | cmake ../ |
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74 | 19 | steve-m | make |
75 | 33 | steve-m | sudo make install |
76 | 19 | steve-m | }}} |
77 | |||
78 | Building with autotools: |
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79 | {{{ |
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80 | cd rtl-sdr/ |
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81 | autoreconf -i |
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82 | ./configure |
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83 | make |
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84 | 33 | steve-m | sudo make install |
85 | 19 | steve-m | }}} |
86 | |||
87 | 72 | horiz0n | The build executables (rtl_sdr, rtl_tcp and rtl_test) can be found in rtl-sdr/src/. |
88 | 27 | horiz0n | |
89 | 1 | steve-m | [attachment:RelWithDebInfo.zip pre-built Windows version] using libusb 1.0.9 and pthreads-win32 cvs |
90 | 72 | horiz0n | |
91 | 1 | steve-m | ==== Gnuradio Source ==== |
92 | 27 | horiz0n | |
93 | 29 | horiz0n | '''The gnuradio source requires the rtl-sdr package and a recent gnuradio (>= v3.5.3) to be installed.''' |
94 | 27 | horiz0n | |
95 | 56 | horiz0n | The source supports direct device operation as well as a tcp client mode when using the rtl_tcp utility as a spectrum server. |
96 | 54 | horiz0n | |
97 | 27 | horiz0n | Please note: prior pulling a new version from git and compiling it, please do a "make uninstall" first to properly remove the previous version. |
98 | |||
99 | 92 | horiz0n | Please note: you always should build & '''install the latest version of the dependencies (librtlsdr in this case)''' before trying to build the gr source. |
100 | |||
101 | 27 | horiz0n | Building with cmake: |
102 | {{{ |
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103 | git clone git://git.osmocom.org/gr-osmosdr |
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104 | cd gr-osmosdr/ |
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105 | mkdir build |
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106 | cd build/ |
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107 | 1 | steve-m | cmake ../ -Wno-dev |
108 | make |
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109 | sudo make install |
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110 | sudo ldconfig |
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111 | }}} |
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112 | |||
113 | 101 | horiz0n | NOTE: The source block (osmosdr/rtlsdr Source) will appear under 'Sources' category in GRC menu. |
114 | 1 | steve-m | |
115 | 84 | horiz0n | For initial tests we recommend the multimode receiver gnuradio companion flowgraph (see "Known Apps" table below). |
116 | |||
117 | 104 | horiz0n | You may find more detailed installation instructions in this recent [http://blog.opensecurityresearch.com/2012/06/getting-started-with-gnu-radio-and-rtl.html tutorial]. |
118 | 103 | horiz0n | |
119 | 1 | steve-m | ==== Automated installation ==== |
120 | |||
121 | 101 | horiz0n | Marcus D. Leech has kindly integrated the forementioned build steps into his gnuradio installation script at [http://www.sbrac.org/files/build-gnuradio]. This is the most user-friendly option so far. |
122 | |||
123 | 1 | steve-m | === Usage === |
124 | |||
125 | 78 | horiz0n | ==== rtl_sdr ==== |
126 | |||
127 | 1 | steve-m | Example: To tune to 392.0 MHz, and set the sample-rate to 1.8 MS/s, use: |
128 | |||
129 | {{{ |
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130 | ./rtl_sdr /tmp/capture.bin -s 1.8e6 -f 392e6 |
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131 | 74 | horiz0n | }}} |
132 | |||
133 | to record samples to a file or to forward the data to a fifo. |
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134 | |||
135 | 90 | horiz0n | If the device can't be opened, make sure you have the appropriate rights to access the device (install udev-rules from the repository, or run it as root). |
136 | 74 | horiz0n | |
137 | 78 | horiz0n | ==== rtl_tcp ==== |
138 | |||
139 | 80 | horiz0n | Example: |
140 | |||
141 | 1 | steve-m | {{{ |
142 | 79 | horiz0n | rtl_tcp -a 10.0.0.2 [-p listen port (default: 1234)] |
143 | Found 1 device(s). |
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144 | Found Elonics E4000 tuner |
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145 | Using Generic RTL2832U (e.g. hama nano) |
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146 | Tuned to 100000000 Hz. |
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147 | listening... |
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148 | Use the device argument 'rtl_tcp=10.0.0.2:1234' in OsmoSDR (gr-osmosdr) source |
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149 | to receive samples in GRC and control rtl_tcp parameters (frequency, gain, ...). |
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150 | 74 | horiz0n | }}} |
151 | 79 | horiz0n | |
152 | 76 | horiz0n | use the rtl_tcp=... device argument in gr-osmosdr source to receive the samples in GRC and control the rtl settings remotely. |
153 | 1 | steve-m | |
154 | 103 | horiz0n | This application has been successfully crosscompiled for ARM and MIPS devices and is providing IQ data in a networked ADS-B setup at a rate of 2.4MSps. The gr-osmosdr source is being used together with an optimized gr-air-modes version (see Known Apps below). |
155 | 85 | steve-m | You can find a Makefile for OpenWRT [http://steve-m.de/projects/rtl-sdr/Makefile here]. |
156 | 76 | horiz0n | |
157 | 1 | steve-m | ==== rtl_test ==== |
158 | 90 | horiz0n | To check the possible tuning range (may heavily vary by some MHz depending on device and temperature), call |
159 | 74 | horiz0n | {{{ |
160 | rtl_test -t |
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161 | 1 | steve-m | }}} |
162 | 90 | horiz0n | |
163 | To check the maximum samplerate possible on your machine, type (change the rate down until no sample loss occurs): |
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164 | 74 | horiz0n | {{{ |
165 | rtl_test -s 3.2e6 |
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166 | 1 | steve-m | }}} |
167 | 90 | horiz0n | A samplerate of 2.4e6 is known to work even over tcp connections (see rtl_tcp above). A sample rate of 2.88e6 may work without lost samples but this may depend on your PC/Laptop's host interface. |
168 | 2 | steve-m | |
169 | == Using the data == |
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170 | |||
171 | 3 | steve-m | To convert the data to a standard cfile, following GNU Radio Block can be used:[[br]] |
172 | [[br]][[Image(rtl2832-cfile.png)]][[br]][[br]] |
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173 | 2 | steve-m | The GNU Radio Companion flowgraph (rtl2832-cfile.grc) is attached to this page. It is based on the FM demodulation flowgraph posted by Alistair Buxton [http://thread.gmane.org/gmane.linux.drivers.video-input-infrastructure/44461/focus=44525 on this thread]. |
174 | 6 | steve-m | |
175 | 22 | horiz0n | Please note: for realtime operation you may use fifos (mkfifo) to forward the iq data from the capture utility to the GRC flowgraph. |
176 | |||
177 | 59 | horiz0n | What has been successfully tested so far is the reception of [https://www.cgran.org/browser/projects/multimode/trunk Broadcast FM and air traffic AM] radio, [http://tetra.osmocom.org/ TETRA], [http://gmr.osmocom.org/ GMR], [http://svn.berlin.ccc.de/projects/airprobe/ GSM], [https://www.cgran.org/wiki/gr-air-modes ADS-B] and [https://github.com/smunaut/osmo-pocsag POCSAG]. |
178 | 32 | horiz0n | |
179 | Tell us your success story with other wireless protocols in ##rtlsdr channel on freenode IRC network. |
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180 | |||
181 | 61 | horiz0n | == Known Apps == |
182 | 60 | horiz0n | |
183 | 81 | horiz0n | The following 3rd party applications and libraries are successfully using either librtlsdr directly or the corresponding gnuradio source (gr-osmosdr): |
184 | 60 | horiz0n | |
185 | ||'''Name'''||'''Type'''||'''Author'''||'''URL'''|| |
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186 | 88 | horiz0n | ||gr-pocsag||GRC Flowgraph||Marcus Leech||[https://www.cgran.org/browser/projects/gr-pocsag/trunk]|| |
187 | 106 | horiz0n | ||multimode RX (try first!)||GRC Flowgraph||Marcus Leech||[https://www.cgran.org/browser/projects/multimode/trunk]|| |
188 | 89 | steve-m | ||simple_fm_rvc||GRC Flowgraph||Marcus Leech||[https://www.cgran.org/browser/projects/simple_fm_rcv/trunk]|| |
189 | 60 | horiz0n | ||python-librtlsdr||Python Wrapper||David Basden||[https://github.com/dbasden/python-librtlsdr]|| |
190 | 63 | horiz0n | ||pyrtlsdr||Python Wrapper||Roger||[https://github.com/roger-/pyrtlsdr]|| |
191 | 60 | horiz0n | ||rtlsdr-waterfall||Python FFT GUI||Kyle Keen||[https://github.com/keenerd/rtlsdr-waterfall]|| |
192 | 67 | horiz0n | ||Wireless Temp. Sensor RX||Gnuradio App||Kevin Mehall||[https://github.com/kevinmehall/rtlsdr-433m-sensor]|| |
193 | 1 | steve-m | ||!QtRadio||SDR GUI||Andrea Montefusco et al.||[http://napan.ca/ghpsdr3/index.php/RTL-SDR]|| |
194 | 88 | horiz0n | ||gqrx (fork)||SDR GUI||Alexandru Csete||[https://github.com/mathisschmieder/gqrx]|| |
195 | 60 | horiz0n | ||rtl_fm '''(NEW)'''||SDR CLI||Kyle Keen||[https://github.com/keenerd/rtl-sdr]|| |
196 | ||SDR# '''(NEW)'''||SDR GUI||Youssef||[http://sdrsharp.com/]|| |
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197 | 102 | horiz0n | ||tetra_demod_fft '''(NEW)'''||Trunking RX||osmocom team||[http://cgit.osmocom.org/cgit/osmo-tetra/tree/src/demod/python/osmosdr-tetra_demod_fft.py osmosdr-tetra_demod_fft.py] and the [http://tetra.osmocom.org/trac/wiki/osmo-tetra#Quickexample HOWTO] || |
198 | 99 | horiz0n | ||gqrx (original) '''(NEW)'''||SDR GUI||Alexandru Csete||[https://github.com/csete/gqrx]|| |
199 | 1 | steve-m | ||airprobe '''(NEW)'''||GSM sniffer||osmocom team et al||[http://git.gnumonks.org/cgi-bin/gitweb.cgi?p=airprobe.git]|| |
200 | 102 | horiz0n | ||gr-smartnet (patches) '''(NEW)'''||Trunking RX||Nick Foster||[http://www.reddit.com/r/RTLSDR/comments/us3yo/rtlsdr_smartnet/]|| |
201 | 105 | horiz0n | ||gr-air-modes (original) '''(NEW)'''||ADS-B RX||Nick Foster||[https://github.com/bistromath/gr-air-modes] call with --rtlsdr option|| |
202 | |||
203 | 101 | horiz0n | |
204 | 98 | steve-m | |
205 | 91 | horiz0n | [[br]] |
206 | 60 | horiz0n | Using our lib? Tell us! Don't? Tell us why! :) |
207 | 91 | horiz0n | [[br]][[br]][[br]] |
208 | 6 | steve-m | [[Image(rtl-sdr-gmr.png)]][[br]] |
209 | Multiple GMR-carriers can be seen in a spectrum view with the full 3.2 MHz bandwidth (at 3.2 MS/s). |