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Porting apps to Leste (29)
to Maemo 7 / Leste by Arno_11 - 3 days, 6 hrs ago -
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to Maemo 5 / Fremantle by teroyk - 4 days, 9 hrs ago - more...
| The Following 2 Users Say Thank You to biketool For This Useful Post: | ||
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2013-12-27
, 11:33
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Posts: 638 |
Thanked: 1,692 times |
Joined on Aug 2009
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#62
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Power consumption comparison of different rtl2832 DVB-T keys:
http://funcubedongle.pbworks.com/w/page/65555471/Power
http://blog.palosaari.fi/2013/06/nak...-rtl2832u.html
...it seems that the E4000 is the best choice when used with the N900
Last edited by xes; 2013-12-27 at 11:36.
http://funcubedongle.pbworks.com/w/page/65555471/Power
http://blog.palosaari.fi/2013/06/nak...-rtl2832u.html
...it seems that the E4000 is the best choice when used with the N900
Last edited by xes; 2013-12-27 at 11:36.
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2014-02-03
, 02:39
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Posts: 445 |
Thanked: 367 times |
Joined on Nov 2010
@ Italy
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#63
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is it possible to monitor bus waiting times as explained here? http://www.windytan.com/2013/11/deco...-bus-stop.html
__________________
Flickr photos taken with N900 https://www.flickr.com/cameras/nokia/n900/
"Closed source software tells you what you can do. With open source, you decide what software can do for you" Richard Stallman
Flickr photos taken with N900 https://www.flickr.com/cameras/nokia/n900/
"Closed source software tells you what you can do. With open source, you decide what software can do for you" Richard Stallman
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2014-02-03
, 21:33
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Posts: 638 |
Thanked: 1,692 times |
Joined on Aug 2009
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#64
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Originally Posted by gianko
Sure!! Outside there are many things you can decode with a rtl2832 key!
is it possible to monitor bus waiting times as explained here? http://www.windytan.com/2013/11/deco...-bus-stop.html
For example, weather stations, door remotes, wireless alarms...
Look here:
https://github.com/merbanan/rtl_433
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2014-02-09
, 21:26
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Posts: 638 |
Thanked: 1,692 times |
Joined on Aug 2009
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#65
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News:
libusb1 is available in extras repo and also rtl-sdr built from latest git version 0.5.3.2 should be available soon:
http://maemo.org/packages/package_in...-5b01-1maemo6/
Last edited by xes; 2014-02-09 at 21:30.
libusb1 is available in extras repo and also rtl-sdr built from latest git version 0.5.3.2 should be available soon:
http://maemo.org/packages/package_in...-5b01-1maemo6/
Last edited by xes; 2014-02-09 at 21:30.
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2014-02-10
, 22:51
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Posts: 5,028 |
Thanked: 8,613 times |
Joined on Mar 2011
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#66
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Hell yeah! Thank you very much.
Now, you may consider adding "[Annoucement]" to thread title.Either way, I hope it gains attention that it deserves.
Now, you may consider adding "[Annoucement]" to thread title.Either way, I hope it gains attention that it deserves.
__________________
N900's aluminum backcover / body replacement
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N900's HDMI-Out
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Camera cover MOD
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Measure battery's real capacity on-device
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TrueCrypt 7.1 | ereswap | bnf
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Hardware's mods research is costly. To support my work, please consider donating. Thank You!
N900's aluminum backcover / body replacement
-
N900's HDMI-Out
-
Camera cover MOD
-
Measure battery's real capacity on-device
-
TrueCrypt 7.1 | ereswap | bnf
-
Hardware's mods research is costly. To support my work, please consider donating. Thank You!
| The Following User Says Thank You to Estel For This Useful Post: | ||
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2014-06-05
, 17:02
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Posts: 1,417 |
Thanked: 2,619 times |
Joined on Jan 2011
@ Touring
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#67
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Xes, I finally fought with apt and have it all installed, now I am getting aplay errors of all things. Since I have the deb installed and it is in /usr/bin I edited the line from the optified example on your first post.
Any chance you will be packaging gqrx?
I wish I had a handle on the technical side of Linux like I do with analog components; I wouldn't ever bother you again. I think I need to go make a yaggi and once I figure this out see if I can pull down some weather satellite feeds.
Last edited by biketool; 2014-06-06 at 05:43.
Code:
rtl_fm -f 430175000 -N -r 11000 - | aplay -r 11k -f S
16_LE -t raw -c 1
Failed to stat runtime directory /home/user/.pulse/8ec05df9ed93e7200d2004d40053170b:runtime: Invalid argument
rtl_fm: invalid option -- N
rtl_fm, a simple narrow band FM demodulator for RTL2832 based DVB-T receivers
Use: rtl_fm -f freq [-options] [filename]
-f frequency_to_tune_to [Hz]
use multiple -f for scanning (requires squelch)
ranges supported, -f 118M:137M:25k
[-M modulation (default: fm)]
fm, wbfm, raw, am, usb, lsb
wbfm == -M fm -s 170k -o 4 -A fast -r 32k -l 0 -E deemp
raw mode outputs 2x16 bit IQ pairs
[-s sample_rate (default: 24k)]
[-d device_index (default: 0)]
[-g tuner_gain (default: automatic)]
[-l squelch_level (default: 0/off)]
[-p ppm_error (default: 0)]
[-E enable_option (default: none)]
use multiple -E to enable multiple options
edge: enable lower edge tuning
dc: enable dc blocking filter
deemp: enable de-emphasis filter
direct: enable direct sampling
offset: enable offset tuning
filename ('-' means stdout)
omitting the filename also uses stdout
Experimental options:
[-r resample_rate (default: none / same as -s)]
[-t squelch_delay (default: 10)]
+values will mute/scan, -values will exit
[-F fir_size (default: off)]
enables low-leakage downsample filter
size can be 0 or 9. 0 has bad roll off
[-A std/fast/lut choose atan math (default: std)]
Produces signed 16 bit ints, use Sox or aplay to hear them.
rtl_fm ... | play -t raw -r 24k -es -b 16 -c 1 -V1 -
| aplay -r 24k -f S16_LE -t raw -c 1
-M wbfm | play -r 32k ...
-s 22050 | multimon -t raw /dev/stdin
aplay: playback:2297: read error
I wish I had a handle on the technical side of Linux like I do with analog components; I wouldn't ever bother you again. I think I need to go make a yaggi and once I figure this out see if I can pull down some weather satellite feeds.
Last edited by biketool; 2014-06-06 at 05:43.
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2014-06-06
, 06:01
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Posts: 1,417 |
Thanked: 2,619 times |
Joined on Jan 2011
@ Touring
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#68
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Tried again like this
Looks like everything was fine on the lame side but I got a segmentation fault.
in lsmod I have rtc_core rtc_twl4030 loaded
I am not sure how to get rtl_fm to give a more verbose fail.
Off topic but I was surfing around in the repos and saw you have uploaded hamlib, what other things for hams do you have on the repos, for seme reason I had to hand load things like libusb1, not searchable via my app manager.
Code:
rtl_fm -f 430175000 -N -r 11000 - | lame -r -s 11000 -m m -b 64 - a.mp3
in lsmod I have rtc_core rtc_twl4030 loaded
I am not sure how to get rtl_fm to give a more verbose fail.
Off topic but I was surfing around in the repos and saw you have uploaded hamlib, what other things for hams do you have on the repos, for seme reason I had to hand load things like libusb1, not searchable via my app manager.
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2014-06-06
, 08:50
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Posts: 638 |
Thanked: 1,692 times |
Joined on Aug 2009
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#69
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@biketool
please check again using new syntax "-M fm" instead "-N".
rtl-sdr version available in extras-testing uses new syntax (as you can see from your error message)
First post updated.
please check again using new syntax "-M fm" instead "-N".
rtl-sdr version available in extras-testing uses new syntax (as you can see from your error message)
First post updated.
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2014-06-06
, 09:32
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Posts: 1,417 |
Thanked: 2,619 times |
Joined on Jan 2011
@ Touring
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#70
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Tried your above, even
causes a segmentation fault...
Oh S#!t ran as root and......
well not quite but closer; rtl_fm is going though
Good news its that a double scud battery seems to support enough amps for this USB dongle.
Code:
rtl_fm -f 430175000
Oh S#!t ran as root and......
well not quite but closer; rtl_fm is going though
Code:
~/MyDocs $ sudo rtl_fm -f 430175000 -M -r 11000 - | apla y -r 11k -f S16_LE -t raw -c 1 Failed to stat runtime directory /home/user/.pulse/8ec05df9ed93e7200d2004d40053170b:runtime: Invalid argument Found 1 device(s): 0: Realtek, RTL2841UHIDIR, SN: 00000001 Using device 0: Generic RTL2832U OEM Found Rafael Micro R820T tuner Tuner gain set to automatic. Tuned to 430427000 Hz. Oversampling input by: 42x. Oversampling output by: 1x. Buffer size: 8.13ms Exact sample rate is: 1008000.009613 Hz Sampling at 1008000 S/s. Output at 24000 Hz.
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| gnuradio, nokia n900, rtl-sdr |
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"Well, it's very easy... Unpack all in /opt/ , add the gnuradio and rtl_sdr libs folder in /etc/ld.so.conf or symlink them into /usr/lib. ...Done and ready to go! "