Re: Simple Components 4.12 with MQTT implementation released

[hanslad@gmail.com]

I think the OPC UA discussion is interesting. Possibly not the right forum but anyway: 

> 
> It is not a device, it a SBC with an OPC stack in it. We have that too, 
> an ARM board with OPC UA server, no problem whatsoever. Anybody can have it.
> 
> Now try to sample 8 10kHz channels and subscribe to them through OPC, 
> get the data to a PC and log them with time stamps and no losses.

I can't see what in the OPC UA standard from OPC Foundation that doesn't make this possible? Having in mind that OPC UA is just a protocol standard and given that you have hardware to cope with the problem, there should be no problem to create a subscription with monitoring items on the items that holds the value of the channels(In my lack of understanding what a channel is, I have regarded this as something with a value, represented as a double, changing 10000 times a second). Setting up a subscription with the requested sample rate and, say, a publishing interval of 1 sec gives a close to 16 MBit/s binary encoded stream. That's not to difficult to handle for any system? 
Also, there is pub-sub is added to OPC UA in the upcoming 1.04 version of the standard. I cant' see why OPC UA shouldn't bee fit for device to device communication, both real-time-, information model-(for interoperability) and security-wise?

Regards 
Hans Petter