ID:	5104
From:	Majenko Technologies <ma...@majenko.co.uk>
Date:	Sat, 4 Sep 2021 14:24:43 +0100
Subject:	Re: [pcb-rnd] [electronics] minilib and utility for DMM serial proto
in-reply-to:	5103 from rn...@igor2.repo.hu
replies:	5107 from rn...@igor2.repo.hu , 5108 from rn...@igor2.repo.hu
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Nice. I have a UI61E as my main DMM and use sigrok as a go-between between
the DMM and my own programs. Maybe this can help me make my setup a little
lighter. Does it support the USB interface? It's not a serial USB interface
but a HID one.
 
On Sat, Sep 4, 2021 at 2:11 PM <rnd2@igor2.repo.hu> wrote:
 
> Hi all,
>
> since this list is not only about pcb-rnd but about electronics in
> general, some of you may find this useful.
>
> I had to buy a new handheld DMM and the model I got happens to have
> opto-isolated serial line and sends readouts twice a second. It's an
> UT61E, based on the ES51922 DMM chip. I looked at how others read the
> data on Linux, and found the usual sad stuff:
>
> - proprietary windows-only software,
>
> - a sigrok plugin that would require a whole sigrok installation just to
> be able to print a voltage,
>
> - script implementations depending on the whole python universe and some
> "get it from github" serial line lib
>
> I really prefer my software be as simple as possible, so I decided this
> needs an "-rnd solution". The chip has a detailed datasheet so the
> protocol is known. After a few hours of coding, I've released this:
>
> http://repo.hu/projects/ut61/
>
> Main properties:
>
> - reentrant lib for opening the port and decoding the protocol
>
> - a command line utility that is very flexible on how it prints the
> decoded readout on stdout
>
> - all implemented in plain C89 with no external dependencies
>
> - should run on any *NIX that has the basic termios libc API for setting
> up the serial port (I normally use stty for this, but the DMM adaptor
> requires DTR and RTS set up in a specific way that is just not possible
> with stty).
>
> - permissive license (LGPL)
>
> - "old-style" project with author/contact info, documentation, releases
>
> If you have a DMM with rs232 or USB connection and it has the same chip
> or you suspect it speaks the same protocol, give it a try!
>
> Best regards,
>
> Igor2
>
>
>
 
-- 
*Matt Jenkins*
Majenko Technologies
https://majenko.co.uk
 
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<div dir=3D"ltr">Nice. I have a UI61E as my main DMM and use sigrok as a go=
-between between the DMM and my own programs. Maybe this can help me make m=
y setup a little lighter. Does it support the USB interface? It&#39;s not a=
 serial USB interface but a HID one.<br></div><br><div class=3D"gmail_quote=
"><div dir=3D"ltr" class=3D"gmail_attr">On Sat, Sep 4, 2021 at 2:11 PM &lt;=
<a href=3D"mailto:rnd2@igor2.repo.hu">rnd2@igor2.repo.hu</a>&gt; wrote:<br>=
</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;b=
order-left:1px solid rgb(204,204,204);padding-left:1ex">Hi all,<br>
<br>
since this list is not only about pcb-rnd but about electronics in <br>
general, some of you may find this useful. <br>
<br>
I had to buy a new handheld DMM and the model I got happens to have <br>
opto-isolated serial line and sends readouts twice a second. It&#39;s an <b=
r>
UT61E, based on the ES51922 DMM chip. I looked at how others read the <br>
data on Linux, and found the usual sad stuff: <br>
<br>
- proprietary windows-only software, <br>
<br>
- a sigrok plugin that would require a whole sigrok installation just to <b=
r>
be able to print a voltage,<br>
<br>
- script implementations depending on the whole python universe and some <b=
r>
&quot;get it from github&quot; serial line lib<br>
<br>
I really prefer my software be as simple as possible, so I decided this <br=
>
needs an &quot;-rnd solution&quot;. The chip has a detailed datasheet so th=
e <br>
protocol is known. After a few hours of coding, I&#39;ve released this: <br=
>
<br>
<a href=3D"http://repo.hu/projects/ut61/" rel=3D"noreferrer" target=3D"_bla=
nk">http://repo.hu/projects/ut61/</a><br>
<br>
Main properties:<br>
<br>
- reentrant lib for opening the port and decoding the protocol<br>
<br>
- a command line utility that is very flexible on how it prints the <br>
decoded readout on stdout<br>
<br>
- all implemented in plain C89 with no external dependencies<br>
<br>
- should run on any *NIX that has the basic termios libc API for setting <b=
r>
up the serial port (I normally use stty for this, but the DMM adaptor <br>
requires DTR and RTS set up in a specific way that is just not possible <br=
>
with stty).<br>
<br>
- permissive license (LGPL)<br>
<br>
- &quot;old-style&quot; project with author/contact info, documentation, re=
leases<br>
<br>
If you have a DMM with rs232 or USB connection and it has the same chip <br=
>
or you suspect it speaks the same protocol, give it a try!<br>
<br>
Best regards,<br>
<br>
Igor2<br>
<br>
<br>
</blockquote></div><br clear=3D"all"><br>-- <br><div dir=3D"ltr" class=3D"g=
mail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><b>Matt Jenkins</b><=
div>Majenko Technologies</div><div><a href=3D"https://majenko.co.uk" target=
=3D"_blank">https://majenko.co.uk</a></div></div></div></div></div>
 
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