[GreenKeys] ITTY to real Teletype
John Spigel
w1an.dxusa at gmail.com
Mon Nov 11 08:42:20 EST 2024
Hi Rob.
Are you attempting to decode to audio and saving with minimodem to a
text file or just send the ITTY FSK audio to your TU for printing? My
shells only result in audio FSK for inputting to a TU and just work. I
have no experience with piping mpg to minimodem for saving although I
will definitelly try when time permits. If saving to a file you may
need to provide a file type for saving? .txt? or remove the -f just to
print to screen as first step. Also you might try without the "-i" as it
may undo the -a auto mark/space detect. And try removing the -one, -R
11025, etc., until you get the basics working. Using defaults should be
the place to start and may be all you need. And I don't use curl at all.
73, John W1AN
On 11-Nov-24 03:03, Rob Jarratt wrote:
> Hello John,
>
> I tried piping this into minimodem following the suggestions using curl that I received before, but it doesn't seem to work. This is what I tried
>
> mpg123 http://internet-tty.net:8000/ITTY -q -s | minimodem rtty -i -a -q --rx-one -R 11025 -f -
>
> There was no output from this command (other than some header information). Am I missing something?
>
> Thanks
>
> Rob
>
>> -----Original Message-----
>> From: greenkeys-bounces at mailman.qth.net <greenkeys-
>> bounces at mailman.qth.net> On Behalf Of John Spigel
>> Sent: 11 November 2024 03:10
>> To: greenkeys at mailman.qth.net
>> Subject: Re: [GreenKeys] ITTY to real Teletype
>>
>> Rob, I have several very simple shell scripts here for running the different ITTY
>> sources or printing files for RazPi.
>>
>> https://w1an.com/files/tty-shell-scripts
>>
>> The ITTY for US runs continuously.
>> Maybe see if they are of use to you.
>>
>> 73, John W1AN
>>
>> On 10-Nov-24 13:03, Rob Jarratt via GreenKeys wrote:
>>> Looks like curl -N should do the trick them without me having to write
>>> a special program to keep it running. I wish I had checked the other
>>> feeds before assuming curl just exits after every message!
>>>
>>> Regards
>>>
>>> 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 <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
>>> <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
>>> <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 <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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>>> >>>
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>>> >>
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>>> gksearch> 2002-to-present greenkeys archive:
>>> >>>>> http://mailman.qth.net/pipermail/greenkeys/ <http://
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>>> >>>>> 1998-to-2001 greenkeys archive:
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>>> <http://mailman.qth.net/archive/greenkeys/greenkeys.html>
>>> >>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>> >>>>> http://comcents.com/tty/greenkeyssearch.html <http://
>>> comcents.com/tty/greenkeyssearch.html>
>>> >>
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>>> >
>>>
>> ______________________________________________________________
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>>>
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>>>
>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
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>>> gksearch>
>>>
>>> 2002-to-present greenkeys archive: http://
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>>>
>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/
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>>> mailman.qth.net/archive/greenkeys/greenkeys.html>
>>>
>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>> http://comcents.com/tty/greenkeyssearch.html <http://
>>> comcents.com/tty/greenkeyssearch.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:
>>>>>> 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
>>> w1an.dxusa at gmail.com
>>
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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:
>>>>> 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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