[time-nuts] Re: timing lab, remote control

[Jim Lux]

 
I'd think that if they're selling into an industrial controls market that it has to be reasonably robust.  The functionality is fairly limited in this kind of application, so the software is less likely to be buggy.  When I see features like "web access" or "autoupload to cloud" I might get more nervous (if only because that means it's an attack surface for intruders..)



On Thu, 11 Jan 2024 12:52:12 -0500, Bob Camp <kb8tq at n1k.org> wrote:

Hi

A pair of $35 each RPi’s and who knows who’s add on boards for (maybe) $50 each gets you quite a ways. Assuming “who knows who” also provides a rational library to support their boards things should not be to far off into the world of insane projects. By the time you add cases, you have made it past $100 each. Pick another brand of add on board, add the supply adapter and you could easily be up around $150 each. Off to a fancier RPi and you could maybe get to $200 … maybe.

Even with the RPi approach, this could get pretty expensive pretty fast.

Do you really escape from bugs and issues with this or that canned solution? There are similar devices that (when you tear them apart) have something like an RPi buried inside. That’s based on chatting with folks who tear this stuff apart for a living. You are saving the hassle of doing it DIY. You now are isolated enough that fixing bugs is more difficult. We don’t live in a perfect world …..

Bob



> On Jan 11, 2024, at 12:22 PM, Jim Lux via time-nuts  wrote:
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> ooh.. $500 each.. That's about what I would expect, but you gave the key thing, a search term.
>
> So this is about what I'd expect, pricewise - RPi, isolated interface card, integration, package, some software.
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> On Thu, 11 Jan 2024 08:00:01 -0800, Eric Garner via time-nuts  wrote:
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> This kind of need is pretty common in the PLC/industrial automation world.
>
> Moxa among others makes devices like this.
> https://www.moxa.com/en/products/industrial-edge-connectivity/controllers-and-ios/universal-controllers-and-i-os/iomirror-e3200-series
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> The search term you're looking for is "IO mirror"
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> Eric
>
> On Thu, Jan 11, 2024, 6:18 AM Tom Van Baak via time-nuts <
> time-nuts at lists.febo.com> wrote:
>
>> There was a posting from Skip a while ago that didn't come through. See
>> below for his request. Me too.
>>
>> In my case, I have an area at home you could call my working bench. I
>> also have small room, less accessible, where I keep my best clocks with
>> as little human interference as possible. I'd like to improve its remote
>> monitoring and control over ethernet.
>>
>> So the question is, does anyone make a black box that acts as a
>> transparent latch or GPIO? I'd like 8 or 16 bits at my bench that when
>> changed turn into bits in the remote lab. Ideally no setup, no protocol,
>> no commands, no software, no operating system, no bugs; just two boxes
>> with N pins on each end and changes are reflected from one to the other
>> over LAN. TTL/CMOS level is fine. Some latency is ok.
>>
>> I'm not looking for yet another WiFi, Arduino/LAN, or R-Pi project, but
>> rather a turn-key solution that just works. I spent a significant amount
>> of time on the web, thinking this would be a trivial search, but I came
>> up empty.
>>
>> Thanks,
>> /tvb
>>
>>> I'm looking for a box that has an Ethernet port on one side and some
>> number or I/O
>>> (could be from 1 to n) on the other. When two of these boxes are paired
>>> (by entering their respective IP addresses), the state of an input on
>> one box is
>>> reflected in the output of the other box (and vice versa).
>>>
>>> An example would be if I had a switch hooked to the input of one box,
>> its state would
>>> be reflected in the output of the paired box, such as controlling a
>> motor remotely.
>>>
>>> Any ideas? Perhaps there might be a business opportunity here if it
>> doesn't exist.
>>> Thanks for the time,
>>> Skip Withrow
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