[GreenKeys] ITTY to real Teletype
Rob Jarratt
robert.jarratt at ntlworld.com
Sat Nov 16 08:33:21 EST 2024
My thoughts exactly, I doubt Curl knows about the footer, but it is very odd that when a message finishes on ITTY it just dies without an error, but other feeds continue to receive other messages. Going to look at tcpdump, but my last attempt didn't show anything odd.
> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net <greenkeys-
> bounces at mailman.qth.net> On Behalf Of John, W9DDD
> Sent: 16 November 2024 13:08
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] ITTY to real Teletype
>
> On a PC I was using, I was just reading the screen, and not sending on to a
> real machine. I was letting it run 24/7, but at times I'd come back into the
> room and find it stalled. I don't recall if the problem was
> resolved.Unfortunately that PC is currently mothballed due to some
> renovations going on.
>
> I don't think curl knows whats in the bit stream. It just fetches the audio
> stream and pipes it to lame
>
>
> On 11/16/2024 12:46 AM, Paul Heller via GreenKeys wrote:
> > The ITTY feeds all work the same way: send a header, send the article,
> > and send a footer. The footer is a text file on the server. The
> > EUROPE server is missing the footer file, so nothing is sent. The main
> > ITTY server has a footer with five or six CR and LF characters and
> > that is all. The intent was to put some space between the articles.
> >
> > Could it be that curl shuts off if it sees a stream of multiple CRLFs?
> >
> > For now, to help us test, I have deleted the footer.txt file on the
> > main ITTY server. Let me know if curl now works.
> >
> > We can also experiment by sending an article with only CRLFs through
> > to AUTOSTART to see if curl dies.
> >
> > Paul
> >
> >
> >> On Nov 15, 2024, at 7:39 PM, Rob Jarratt
> >> <robert.jarratt at ntlworld.com> wrote:
> >>
> >>
> >>
> >> Yes I tried that but all I could see was data arriving and then curl
> >> dying. There didn’t seem anything odd about the data, but it was all
> >> binary. I could try to delve deeper but I thought the best starting
> >> point was to ask if there is any known difference between ITTY and
> >> the other feeds. Paul seemed to think that possibly some headers
> >> might be different.
> >>
> >> *From:*steve bennett <raleigh_ranger at yahoo.com>
> >> *Sent:* 15 November 2024 12:58
> >> *To:* 'Paul Heller' <paul0926 at comcast.net>; rob at jarratt.me.uk; Rob
> >> Jarratt <robert.jarratt at ntlworld.com>
> >> *Cc:* 'Mailing List Green Keys' <greenkeys at mailman.qth.net>
> >> *Subject:* Re: [GreenKeys] ITTY to real Teletype
> >>
> >> record and examine the stream at the point where it dies?
> >>
> >> On Friday, November 15, 2024 at 07:55:38 AM EST, Rob Jarratt via
> >> GreenKeys <greenkeys at mailman.qth.net
> >> <mailto:greenkeys at mailman.qth.net>> wrote:
> >>
> >> Hello Paul,
> >>
> >> It is fair to say that I will end up using the autostart feed rather
> >> than ITTY, but my sense of tidiness tells me that I would like to
> >> understand why ITTY kills curl stone dead, and I may want to use ITTY
> >> from time to time.
> >>
> >> I think it would be good to fix this if the solution is easy to find
> >> and fix because others might have similar issues in future and not
> >> understand what is going on.
> >>
> >> Thanks
> >>
> >> Rob
> >>
> >> *From:*greenkeys-bounces at mailman.qth.net
> >> <mailto:greenkeys-bounces at mailman.qth.net>
> >> <greenkeys-bounces at mailman.qth.net
> >> <mailto:greenkeys-bounces at mailman.qth.net>> *On Behalf Of *Paul
> >> Heller via GreenKeys
> >> *Sent:* 15 November 2024 11:26
> >> *To:* rob at jarratt.me.uk <mailto:rob at jarratt.me.uk>
> >> *Cc:* Mailing List Green Keys <GreenKeys at mailman.qth.net
> >> <mailto:GreenKeys at mailman.qth.net>>
> >> *Subject:* Re: [GreenKeys] ITTY to real Teletype
> >>
> >> Hi Rob. I stopped looking because I thought you went another
> >> direction. I guess I was wrong about that?
> >>
> >> I’ll start looking into it.
> >>
> >> Paul
> >>
> >> On Nov 14, 2024, at 9:06 PM, Rob Jarratt
> >> <robert.jarratt at ntlworld.com
> >> <mailto:robert.jarratt at ntlworld.com>> wrote:
> >>
> >>
> >>
> >> Hello Paul,
> >>
> >> I was just wondering if you ever got to look at this issue with
> >> ITTY killing curl while the Europe channel doesn’t?
> >>
> >> Thanks
> >>
> >> Rob
> >>
> >> *From:*Paul Heller <paul0926 at comcast.net
> >> <mailto:paul0926 at comcast.net>>
> >> *Sent:* 10 November 2024 14:40
> >> *To:* rob at jarratt.me.uk <mailto:rob at jarratt.me.uk>; Rob Jarratt
> >> <robert.jarratt at ntlworld.com <mailto:robert.jarratt at ntlworld.com>>
> >> *Cc:* Hugh Pyle <hughpyle at gmail.com
> <mailto:hughpyle at gmail.com>>;
> >> Jeffrey Golas <jeffg at junknet.net <mailto:jeffg at junknet.net>>;
> >> Mailing List Green Keys <GreenKeys at mailman.qth.net
> >> <mailto:GreenKeys at mailman.qth.net>>
> >> *Subject:* Re: [GreenKeys] ITTY to real Teletype
> >>
> >> That is strange that the Europe channel is ok and the ITTY
> >> channel is not. I’d like to resolve this.
> >>
> >> The ITTY channels each have a footer transmission after the main
> >> transmission. Maybe the footers are different. I will look into
> >> this later today.
> >>
> >> Paul
> >> W2TTY
> >>
> >>
> >> On Nov 10, 2024, at 1:52 PM, Rob Jarratt via GreenKeys
> >> <greenkeys at mailman.qth.net
> >> <mailto:greenkeys at mailman.qth.net>> wrote:
> >>
> >>
> >>
> >> I have been trying these suggestions using curl to receive
> >> ITTY and pipe it through lame and minimodem. It works well.
> >>
> >> However, I didn’t like that curl exits after every message.
> >> So, I thought I would try to write my own code that keeps
> >> going, using libcurl, which is what curl is built from.
> >>
> >> I discovered though that the ITTY feed does something strange
> >> and it causes curl (and libcurl) to just silently exit at the
> >> end of a message. It never reaches my cleanup code, it just
> >> dies. I thought it was a problem with my code, but I don’t
> >> think it is, there is something specifically wrong with
> >> http://internet-tty.net:8000/ITTY that cause curl to die. I
> >> have been trying to work it out but have not found the issue
> >> yet. Is anyone aware of anything peculiar about the ITTY
> >> feed? It doesn’t seem to happen for the EUROPE feed, I am not
> >> sure yet about AUTOSTART and it is able to repeatedly
> >> download other URLs (www.example.com
> <http://www.example.com>
> >> for example).
> >>
> >> Thanks
> >>
> >> Rob
> >>
> >> *From:*greenkeys-bounces at mailman.qth.net
> >> <mailto:greenkeys-bounces at mailman.qth.net>
> >> <greenkeys-bounces at mailman.qth.net
> >> <mailto:greenkeys-bounces at mailman.qth.net>> *On Behalf Of
> >> *Hugh Pyle
> >> *Sent:* 07 October 2024 20:06
> >> *To:* Jeffrey Golas <jeffg at junknet.net
> >> <mailto:jeffg at junknet.net>>
> >> *Cc:* Mailing List Green Keys <GreenKeys at mailman.qth.net
> >> <mailto:GreenKeys at mailman.qth.net>>; rob at jarratt.me.uk
> >> <mailto:rob at jarratt.me.uk>
> >> *Subject:* Re: [GreenKeys] ITTY to real Teletype
> >>
> >> Here are some aliases, which combine 'curl', 'lame' and
> >> 'minimodem'. I haven't run these unattended for a while, and
> >> I seem to remember there are dropout situations that will
> >> break them easily - so you could then wrap everything in a
> >> loop if necessary. But they might make a good starting point
> >> for you.
> >>
> >>
> >> alias autostart='curl -N -s
> >> http://internet-tty.net:8030/AUTOSTART | lame --decode
> >> --quiet --mp3input - - | minimodem rtty -i -a -q -R 11025 -f -'
> >> alias europe='curl -N -s internet-tty.net:8040/EUROPE
> >> <http://internet-tty.net:8040/EUROPE> | lame --decode --quiet
> >> --mp3input - - | minimodem 50 -M 1275 -S 1445 -5 -i -a -q -R
> >> 11025 -f -'
> >> alias itty='curl -N -s http://internet-tty.net:8000/ITTY |
> >> lame --decode --quiet --mp3input - - | minimodem rtty -i -a
> >> -q --rx-one -R 11025 -f -'
> >>
> >> Hugh
> >>
> >> On Sun, Oct 6, 2024 at 10:15 AM Jeffrey Golas
> >> <jeffg at junknet.net <mailto:jeffg at junknet.net>> wrote:
> >>
> >> Vlc to get the stream, minimodem to decode.
> >>
> >> Jeff
> >>
> >> > On Oct 6, 2024, at 3:18 AM, Rob Jarratt
> >> <robert.jarratt at ntlworld.com
> >> <mailto:robert.jarratt at ntlworld.com>> wrote:
> >> >
> >> > Hello,
> >> >
> >> > Dave was asking this on my behalf, probably unaware
> >> that I am on this list too.
> >> >
> >> > I have seen mention of ITTY Autostart etc and wondered
> >> about receiving all this on my ASR 33.
> >> >
> >> > My thought was to see if I could set up a Raspberry Pi
> >> to receive the audio signal over the internet, translate
> >> that to ASCII and then send it to my ASR33. I already
> >> have the means to connect my ASR33 from software running
> >> on a Raspberry PI or a PC via reverse Telnet. The bit I
> >> am missing is what software (if any) there might be that
> >> I could run on a Raspberry Pi, or Windows that runs in
> >> the background (no GUI) to decode the ITTY audio signal.
> >> I am a software developer though, so I guess if such a
> >> thing doesn't exist then perhaps I can modify the MMTTY
> >> code that is published on GitHub.
> >> >
> >> > Any pointers would be welcome.
> >> >
> >> > Thanks
> >> >
> >> > Rob
> >> >
> >> >> -----Original Message-----
> >> >> From: greenkeys-bounces at mailman.qth.net
> >> <mailto:greenkeys-bounces at mailman.qth.net> <greenkeys-
> >> >> bounces at mailman.qth.net
> >> <mailto:bounces at mailman.qth.net>> On Behalf Of Jeffrey Golas
> >> >> Sent: 06 October 2024 05:30
> >> >> To: David Wade <dave.g4ugm at gmail.com
> >> <mailto:dave.g4ugm at gmail.com>>
> >> >> Cc: Mailing List Green Keys <GreenKeys at mailman.qth.net
> >> <mailto:GreenKeys at mailman.qth.net>>
> >> >> Subject: Re: [GreenKeys] ITTY to real Teletype
> >> >>
> >> >> Normally the ITTY service is fed to a piece of
> >> hardware called a terminal unit
> >> >> (think modem). The service is streaming as RTTY which
> >> is normally sent over
> >> >> amateur radio.
> >> >>
> >> >>
> >> >> Jeff
> >> >>
> >> >>>> On Oct 5, 2024, at 5:34 PM, David Wade
> <dave.g4ugm at gmail.com <mailto:dave.g4ugm at gmail.com>> wrote:
> >> >>>
> >> >>> I know there have been several USB to TTY boards
> >> produced, but what
> >> >> software would you use to drive one of these from itty?
> >> >>>
> >> >>> Dave
> >> >>>
> >> >>> G4UGM
> >> >>>
> >> >>>
> >>
> ______________________________________________________________
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> >> >>> Post: mailto:GreenKeys at mailman.qth.net
> >> <mailto:GreenKeys at mailman.qth.net>
> >> >>>
> >> >>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
> >> >>>>>>https://teletype.net/gksearch 2002-to-present greenkeys
> >> archive:
> >> >>>>>>http://mailman.qth.net/pipermail/greenkeys/
> >> >>>>>> 1998-to-2001 greenkeys archive:
> >> >>>>>>http://mailman.qth.net/archive/greenkeys/greenkeys.html
> >> >>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
> >> >>>>>>http://comcents.com/tty/greenkeyssearch.html
> >> >>>
> >> >>> This list hosted by: http://www.qsl.net Please help
> >> support this email
> >> >>> list: http://www.qsl.net/donate.html Message delivered to
> >> >>> jeffg at junknet.net <mailto:jeffg at junknet.net>
> >> >>
> >>
> ______________________________________________________________
> >> >> GreenKeys mailing list
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> >> >> Help: http://mailman.qth.net/mmfaq.htm
> >> >> Post: mailto:GreenKeys at mailman.qth.net
> >> <mailto:GreenKeys at mailman.qth.net>
> >> >>
> >> >>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
> >> >>>>>https://teletype.net/gksearch 2002-to-present greenkeys
> >> archive:
> >> >>>>>http://mailman.qth.net/pipermail/greenkeys/
> >> >>>>> 1998-to-2001 greenkeys archive:
> >> >>>>>http://mailman.qth.net/archive/greenkeys/greenkeys.html
> >> >>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
> >> >>>>>http://comcents.com/tty/greenkeyssearch.html
> >> >>
> >> >> This list hosted by: http://www.qsl.net
> >> >> Please help support this email list:
> >> http://www.qsl.net/donate.html Message
> >> >> delivered to robert.jarratt at ntlworld.com
> >> <mailto:robert.jarratt at ntlworld.com>
> >> >
> >>
> ______________________________________________________________
> >> GreenKeys mailing list
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> >> Help: http://mailman.qth.net/mmfaq.htm
> >> Post: mailto:GreenKeys at mailman.qth.net
> >> <mailto:GreenKeys at mailman.qth.net>
> >>
> >> >>> Jordan Spencer Cunningham's GreenKeys Search Tool:
> >> https://teletype.net/gksearch
> >> >>> 2002-to-present greenkeys archive:
> >> http://mailman.qth.net/pipermail/greenkeys/
> >> >>> 1998-to-2001 greenkeys archive:
> >> http://mailman.qth.net/archive/greenkeys/greenkeys.html
> >> >>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
> >> http://comcents.com/tty/greenkeyssearch.html
> >>
> >> This list hosted by: http://www.qsl.net
> >> Please help support this email list:
> >> http://www.qsl.net/donate.html
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> >> <mailto:hughpyle at gmail.com>
> >>
> >>
> ______________________________________________________________
> >> GreenKeys mailing list
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> >> Help: http://mailman.qth.net/mmfaq.htm
> >> Post: mailto:GreenKeys at mailman.qth.net
> >>
> >>
> >> Jordan Spencer Cunningham's GreenKeys Search
> >> Tool: https://teletype.net/gksearch
> >>
> >> 2002-to-present greenkeys archive:
> >> http://mailman.qth.net/pipermail/greenkeys/
> >>
> >> 1998-to-2001 greenkeys archive:
> >> http://mailman.qth.net/archive/greenkeys/greenkeys.html
> >>
> >> Randy Guttery's 2001-to-2009 GreenKeys Search
> >> Tool: http://comcents.com/tty/greenkeyssearch.html
> >>
> >>
> >> This list hosted by: http://www.qsl.net
> >> Please help support this email list:
> >> http://www.qsl.net/donate.html
> >> Message delivered to paul0926 at comcast.net
> >> <mailto:paul0926 at comcast.net>
> >>
> >>
> ______________________________________________________________
> >> GreenKeys mailing list
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> >> Help: http://mailman.qth.net/mmfaq.htm
> >> Post: mailto:GreenKeys at mailman.qth.net
> >>
> >> >>> Jordan Spencer Cunningham's GreenKeys Search Tool:
> >> https://teletype.net/gksearch
> >> >>> 2002-to-present greenkeys archive:
> >> http://mailman.qth.net/pipermail/greenkeys/
> >> >>> 1998-to-2001 greenkeys archive:
> >> http://mailman.qth.net/archive/greenkeys/greenkeys.html
> >> >>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
> >> http://comcents.com/tty/greenkeyssearch.html
> >>
> >> This list hosted by: http://www.qsl.net
> >> Please help support this email list: http://www.qsl.net/donate.html
> >> Message delivered to raleigh_ranger at yahoo.com
> >> <mailto:raleigh_ranger at yahoo.com>
> >>
> >
> >
> > ______________________________________________________________
> > GreenKeys mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:GreenKeys at mailman.qth.net
> >
> >>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
> https://teletype.net/gksearch
> >>>> 2002-to-present greenkeys archive:
> http://mailman.qth.net/pipermail/greenkeys/
> >>>> 1998-to-2001 greenkeys archive:
> http://mailman.qth.net/archive/greenkeys/greenkeys.html
> >>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
> http://comcents.com/tty/greenkeyssearch.html
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to w9ddd at tapr.org
>
> --
> ---
> ----
> The above comments or recommendations are SWAG. Use at your own risk.
>
> John, W9DDD
>
> ______________________________________________________________
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> Post: mailto:GreenKeys at mailman.qth.net
>
> >>> Jordan Spencer Cunningham's GreenKeys Search Tool:
> https://teletype.net/gksearch
> >>> 2002-to-present greenkeys archive:
> http://mailman.qth.net/pipermail/greenkeys/
> >>> 1998-to-2001 greenkeys archive:
> http://mailman.qth.net/archive/greenkeys/greenkeys.html
> >>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
> http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to robert.jarratt at ntlworld.com
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