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
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.
Vlc to get the stream, minimodem to decode.
Jeff
> On Oct 6, 2024, at 3:18 AM, Rob Jarratt <[email protected]> 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: [email protected] <greenkeys-
>> [email protected]> On Behalf Of Jeffrey Golas
>> Sent: 06 October 2024 05:30
>> To: David Wade <[email protected]>
>> Cc: Mailing List Green Keys <[email protected]>
>> 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 <[email protected]> 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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>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
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