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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Simple Components 4.12 with MQTT implementation released
Date: Mon, 18 Apr 2016 18:33:03 +0200
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Date: 2016-04-18T18:33:03+02:00
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On 2016-04-16 19:48, slos wrote:

> If no gateway is used the ADC has to implement the protocol, whatever it is..

The IoT protocol obviously, that is the idea of.

>> Now, the point I am making is that neither OPC nor MQTT is suitable to
>> serve as the DDL (data-distribution layer) for a middleware stretching
>> from application to the automation devices. Both were originated under
>> impression of desktop office applications rather than real-life process
>> control.
> I agree. That's why they are used on the upper levels.
> For process control, real time protocols are used.

And that defeats the idea of IoT which presumes a flat network of 
things. One cannot have both, a layered infrastructure of application 
protocols (dependency on the area, not to be confused with OSI layers) 
and an internet of things.

I don't argue for or against either, I only make an observation that OPC 
and MQTT do not fit into the latter architecture.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de