[op25-dev] Re: World's cheapest P25 receiver: $20 RTL2832 dongle + new OP25 Decoder block with DES-OFB for GRC!

historical

Hi all,

A couple of updates:

.         gr-baz (git & SVN) now contains the fix to the issue regarding the
'gruel_common' compilation error (thanks Alex Csete).

.         The OP25 block now first tries to use the op25.fsk4_demod_ff, and
then falls back to fsk4.demod_ff if the former is not found.

.         For those experimenting with OP25 and the RTL DVT-B USB dongles,
I've started a Google Group
<https://groups.google.com/forum/#!forum/ultra-cheap-sdr>  for discussion
surrounding the device, and its use with gr-baz/GNU Radio/plugin on Windows.

Regarding the error seen by 'allanjs1986' in GRC:

Type "msg" is not a possible type.

I'm a little worried about this - are you using the latest GRC? I thought
message queues (specified by the 'msg' type) were still around. does anyone
know more?

If you need a workaround, then just comment out/delete the last <source>
block (name: 'tune', type: 'msg') in gr-baz/grc/op25.xml, do a sudo make
install, restart GRC, and remember to set 'Output auto tune' to 'No' in the
OP25 decoder block properties.

From: op25-dev at yahoogroups.com [mailto:op25-dev at yahoogroups.com] On Behalf
Of Balint
Sent: Friday, 20 April 2012 8:58 AM
To: op25-dev at yahoogroups.com
Cc: 'Richard Clarke'
Subject: RE: [op25-dev] Re: World's cheapest P25 receiver: $20 RTL2832
dongle + new OP25 Decoder block with DES-OFB for GRC!

Hi all,

This is a known issue - unfortunately I just haven't had the time to make
necessary modifications (will do so now), but the temporary work-around is
to symlink:

    /usr/local/include/gnuradio/swig/gruel_common.i ->
/usr/local/include/gruel/swig/gruel_common.i

The new version will be in the gr-baz repo hopefully very soon.

Thanks for the report,

Balint

From: op25-dev at yahoogroups.com [mailto:op25-dev at yahoogroups.com] On Behalf
Of Richard Clarke
Sent: Friday, 20 April 2012 8:24 AM
To: op25-dev at yahoogroups.com
Subject: Re: [op25-dev] Re: World's cheapest P25 receiver: $20 RTL2832
dongle + new OP25 Decoder block with DES-OFB for GRC!

Hi,

I've just tried building the gr-baz module on a couple of different systems
but I'm encountering a make error along the lines of: ./baz_swig.cc: No such
file or directory

I note someone else has also encountered the same error and pasted their
make output to pastebin (http://pastebin.com/y6dUAxC1). This is the same
error I'm getting. Anyone got any clues? Is this a generated file that isn't
being generated, or a file that hasn't been included in the svn repo?

Thanks

Cheers

Richard

On 6 April 2012 02:14, Balint <balint256 at hotmail.com> wrote:

LOL, I thought someone might say that J

Nice work at that price!!!

From: op25-dev at yahoogroups.com [mailto:op25-dev at yahoogroups.com] On Behalf
Of ikjtel
Sent: Friday, 6 April 2012 12:07 AM
To: op25-dev at yahoogroups.com
Subject: [op25-dev] Re: World's cheapest P25 receiver: $20 RTL2832 dongle +
new OP25 Decoder block with DES-OFB for GRC!

> Firstly, thank you to Max for the Slashdot mention!

Ha ha, it's a pleasure to see this project move forward.

The cheapest one I've ever built was for $1.00 - picked up an old crystal
scanner at a hamfest that happened to have a crystal in it on the proper
frequency for a local P25 station.  It only needed a disc-tap using parts
from the junkbox...

Max

-- 
SCOTT ADAMS: Normal people believe that if it ain't broke, don't fix it.
Engineers believe that if it ain't broke, it doesn't have enough features
yet.

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