[GreenKeys] ITTY to real Teletype
John, W9DDD
w9ddd at tapr.org
Sat Nov 16 08:07:33 EST 2024
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
>> >>>
>> >>>
>> ______________________________________________________________
>> >>> 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
>> <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
>> >> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> >> 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
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> 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 hughpyle at gmail.com
>> <mailto:hughpyle at gmail.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 paul0926 at comcast.net
>> <mailto:paul0926 at comcast.net>
>>
>> ______________________________________________________________
>> 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 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
More information about the GreenKeys
mailing list