Hi all,
With the lack of signals on 14236KHz I've moved to 7177 LSB
and Hil VK2AZ has proved it working though he gets only three seconds of
his voice coming back, then garbled stuff.
This code, hacked from "freebeacon.c" takes the generated "from_radio"
file, runs this script:
#!/bin/bash
# Process recorded audio, called with
# $1 recFileFromRadioName, $2 recFileDecDataName, $3 recFileToRadioName
# and $4 recFileDecAudioName
~/bin/ofdm_demod $1 $2 --ldpc --interleave 1 > /dev/null 2>&1
~/bin/ofdm_mod $2 - --ldpc --interleave 1 > $3y 2>/dev/null
cat $3y | raw2wav16 $3 > /dev/null 2>&1
aplay -D rconvUSB txaudio.wav $3 > /dev/null 2>&1
sleep 9
#mv $1 $2 $3 $4 done/. > /dev/null 2>&1
echo `date` " Play $1 $2 $3 $4" >> ~/parrot/txlog
stty 9600 < /dev/ttyUSB0
stty 0 < /dev/ttyUSB0
---------------- end of script ---------
For those looking at the script, the last line sets DTR and RTS low,
a quirk, a deliberate quirk from the really early days of unix.
Another quirk: With Fedora 28 (+ updates) , two processes cannot open the
one sound device so I have to use a second sound card.
System: Dual core Pi, 1Gb ram, 120Gb SSD on SATA, Fedora 28 ARM.
(Banana Pi original)
On Tue, 17 Jul 2018 10:15:33 +1000, Alan Beard wrote
> Hi all,
>
> In developing code for a repeater (parrot for now) that will "blow away"
> the performance of our current FM repeaters, using SSB transceivers
> or SDR, a "standard" mode would be good.
>
> We all have a "love-hate" relationship to AMBExxx but, it being
> stable, we have been able to develop repeaters for modes P25, D-Star,
> Fusion, DMR and NXDN. This gets us all involved in this new
> technology in both the software and RF areas. A good thing.
>
> So, not to be pushy, do we have any idea when these new modes will
> be in an app to use them over air? When will the code be ready for
> me to use in my parrot repeater?
>
> (full duplex isn't hard in software but is hard at the RF end,
> a transmitter running yet not interfering with the receiver)
>
> Alan VK2ZIW
>
> Evil flourishes when good men do nothing.
> Consider the Christmas child.
> ---------------------------------------------------------------------------
> Alan Beard Unix Support Technician from 1984 to today
> 70 Wedmore Rd. Sun Solaris, AIX, HP/UX, Linux, SCO, MIPS
> Emu Heights N.S.W. 2750 Routers, terminal servers, printers,
> terminals etc.. +61 2 47353013 (h) Support Programming, shell
> scripting, "C", assembler 0414 353013 (mobile) After uni,
> electronics tech
>
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> _______________________________________________
> Freetel-codec2 mailing list
> Freetel-codec2@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/freetel-codec2
Alan
Evil flourishes when good men do nothing.
Consider the Christmas child.
---------------------------------------------------------------------------
Alan Beard Unix Support Technician from 1984 to today
70 Wedmore Rd. Sun Solaris, AIX, HP/UX, Linux, SCO, MIPS
Emu Heights N.S.W. 2750 Routers, terminal servers, printers, terminals etc..
+61 2 47353013 (h) Support Programming, shell scripting, "C", assembler
0414 353013 (mobile) After uni, electronics tech
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Freetel-codec2 mailing list
Freetel-codec2@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/freetel-codec2
