[GreenKeys] ITTY to real Teletype

Sat Nov 16 13:20:19 EST 2024

Use just --rx

       --rx-one
              Quit after the first carrier/no-carrier event (applies to
--rx mode only)

On Sat, Nov 16, 2024, 12:13 PM Rob Jarratt via GreenKeys <
greenkeys at mailman.qth.net> wrote:

> I have determined that the problem is not curl, but either lame or
> minimodem is crashing in the following command:
>
>
>
> curl -N -s http://internet-tty.net:8000/ITTY | lame --decode --quiet
> --mp3input - - | minimodem rtty -i -a -q --rx-one -R 11025 -f
>
>
>
> I am trying to work out which one is crashing.
>
>
>
> *From:* greenkeys-bounces at mailman.qth.net <
> greenkeys-bounces at mailman.qth.net> *On Behalf Of *Paul Heller via
> GreenKeys
> *Sent:* 16 November 2024 09:34
> *To:* rob at jarratt.me.uk
> *Cc:* Mailing List Green Keys <GreenKeys at mailman.qth.net>
> *Subject:* Re: [GreenKeys] ITTY to real Teletype
>
>
>
> OK, I changed the footer. It should now print “mesage complete”
>
>
>
> Paul
>
>
>
>
>
> On Nov 16, 2024, at 10:29 AM, Paul Heller <paul0926 at comcast.net> wrote:
>
> Yes the footer is encoded to the audio.
>
>
>
> I’m puzzled but will keep investigating. Later today I’ll put in a footer
> in that has some text. Let’s see if curl dies before or after the footer is
> sent. I’ll let you know when it is ready.
>
>
>
> Paul
>
>
>
>
>
> On Nov 16, 2024, at 9:57 AM, Rob Jarratt <robert.jarratt at ntlworld.com>
> wrote:
>
> 
>
> I tried just now with ITTY and curl still dies. I may have a bit of time
> today and will try to look at it a bit more closely. In the meantime I
> think you can put the footer back.
>
>
>
> If the footer is a text file though, are you encoding that into audio? If
> that is the case then Curl isn’t going to “see” the CRLFs anyway. I am not
> quite sure how it works on the sending side.
>
>
>
> Regards
>
>
>
> Rob
>
>
>
> *From:* Paul Heller <paul0926 at comcast.net>
> *Sent:* 16 November 2024 06:46
> *To:* Rob Jarratt <robert.jarratt at ntlworld.com>
> *Cc:* steve bennett <raleigh_ranger at yahoo.com>; rob at jarratt.me.uk;
> Mailing List Green Keys <GreenKeys at mailman.qth.net>
> *Subject:* Re: [GreenKeys] ITTY to real Teletype
>
>
>
> 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> 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 <
> 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
> *Cc:* Mailing List Green Keys <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>
> 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>
> *Sent:* 10 November 2024 14:40
> *To:* rob at jarratt.me.uk; Rob Jarratt <robert.jarratt at ntlworld.com>
> *Cc:* Hugh Pyle <hughpyle at gmail.com>; Jeffrey Golas <jeffg at junknet.net>;
> Mailing List Green Keys <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> 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 for example).
>
>
>
> Thanks
>
>
>
> Rob
>
>
>
> *From:* greenkeys-bounces at mailman.qth.net <
> greenkeys-bounces at mailman.qth.net> *On Behalf Of *Hugh Pyle
> *Sent:* 07 October 2024 20:06
> *To:* Jeffrey Golas <jeffg at junknet.net>
> *Cc:* Mailing List Green Keys <GreenKeys at mailman.qth.net>;
> 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 | 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> 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>
> 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 <greenkeys-
> >> bounces at mailman.qth.net> On Behalf Of Jeffrey Golas
> >> Sent: 06 October 2024 05:30
> >> To: David Wade <dave.g4ugm at gmail.com>
> >> Cc: Mailing List Green Keys <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> 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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> >
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>
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>
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>
> 2002-to-present greenkeys archive:
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>
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>
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>
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>
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> >>> 2002-to-present greenkeys archive:
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>
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> Please help support this email list: http://www.qsl.net/donate.html
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>
> >>> 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:
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> >>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
> http://comcents.com/tty/greenkeyssearch.html
>
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