Posted by: @jonbennell

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Now that I've got this preamble out of the way, part of my wish in simplifying the whole system was to use the manufacturers controls (often cited as the best advice in the reading I've done in the past).

The MWR-WW10N Wired Remote Controller that is wired into the MIM-E03CN Control Kit allows you to set both DHW temperature and set a schedule (I aim to heat the water at 1pm where the outside ambient temperature is typically warmest during the day). It appears that once you change the behaviour of the system to use the thermostat within the MWR-WW10N Wired Remote Controller, you can set a central heating set point and switch it on or off. No scheduling or set back temperature options.

My main questions are:

• Does the included Samsung MWR-WW10N Wired Remote Controller make a suitable stand alone controller (albeit without the ability to set a heating schedule with set backs)?
• Has anyone else had success using the Samsung MIM-H04EN WiFi Kit 2.0? If so, how did you get it into SmartThings and what other control do you gain?

My goal is to still have the simplest control system with some degree of remote override ability and avoid short cycling from a control system that isn't well paired with an ASHP. Can I ask what you'd do in my position. Any other views on my efforts are welcome.

Thanks for getting this far!

Jon

preamble and system design: all good. same as mine give or take a few details.

samsung wired remote as standalone controller - yes , if all you need is room temp. as you say, no schedule, no set back. some folk are entirely happy with that.

wifi - don't know. not seen anyone on here thats used it yet.

what have I done - used an external setup that gives me room temp sensing on multiple rooms , scheduling and setback, was originally a boiler system, and it gives me a dynamic "% load" not simply on/off, but I have put home assistant automation between that output of that and the input to the heat pump so that I don't get short cycling, I have a "damping" hysteresis as well. there's some discussion of rolling your own controls on other threads, if you're into that. but perhaps not, if you want simple!

off the shelf option worth a look (not a recommendation, just a name) : Homely

@jonbennell Hi Jon, it looks as if you and I have been on similar journeys. Perhaps G L installed yours as well. I was also hoping to use the wired controller's room stat as it is supposed to be 'a bit more clever when you use the Samsung controller as the thermostat'. However, it doesn't allow you to schedule setback temperatures and the manual for the

Posted by: @jonbennell

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MIM-H04EN WiFi Kit

Posted by: @mike-h

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Unfortunately, there doesn't seem to be anything available to instruct a complete novice on how to go about doing something similar.

thats because the modbus / HA stuff is still at the experimental/tinkering stage, for people comfortable with coding etc. Not mature enough to be written up and/or used if one is not.

the obvious approach that I would suggest thinking about to a non-tech user is to buy Homely. Its a commercial supported product that adds most of what you are talking about - scheduling, setback, remote override, etc, if it doesn't work you are paying them so they should make it work. caveat never used it,  don't know how reliable it is , how well it works... not trying to sell it.

Posted by: @iancalderbank

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thats because the modbus / HA stuff is still at the experimental/tinkering stage, for people comfortable with coding etc

Thanks Ian. I am comfortable with coding, having customised my critical care unit's computerised information system. I'm sure that it would still be a steepish learning curve, but what I really don't understand is how to connect all the hardware together. A simple guide to connecting Samsung to modbus and modbus to laptop would be very helpful.

@mike-h most of the modbus / make your own scheduling system discussion is in this thread

Thanks for those who've read and commented on this post. Interestingly, I did have Homely as part of the original heat pump install but I requested it was removed as there were control issues (turned out to be the wiring to the 2-port valves) but at the time, this was unclear to both me and the installer.

So now I'm back to a single zone and have Evergreen due back on Monday, I've asked them to consider installing Homely again now that we're confident it's a good fit. Crucially for my peace of mind, it aims to use the lowest flow rate (giving greatest efficiency) to meet our heating schedule. This will be simple with at most a 3C setback for over night or when the property is unoccupied.

Finally, Samsung support with the SmartThings ticket has been so far awful. The WiFi kit is going back as it doesn't currently work and is highly unlikely to meet our 'simple to use' goals.

I'd love to play with building a modbus interface as I've seen in other threads. However with running my own business and having a two year old at home, I have other priorities and little time left to entertain my curiosities!

@jonbennell really interested to hear how you get on with homely. its been much discussed on this forum but only theoretically , no one actually has it. Are they coming to install it in person then?

@iancalderbank I'll be happy to let you know how it pans out. Evergreen are coming on Monday to commission my system after the big changes from last week, where they'll fit Homely (I think it's highly likely that they will). I've also got some monitoring attached via a research project so I should be able to provide some empirical evidence.

At the end of this whole project (hoping it will be totally finished on Monday) and after a couple of months of running, there may be a cautionary tale to write, based on my experience. I'm just relieved that my installer, once the defects and quality issues had been observed by their certification body, then agreed to work hard to put it right. It's a shame it took a third party to get them to move from their original position that 'everything is fine...'

Posted by: @jonbennell

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@iancalderbank I'll be happy to let you know how it pans out. Evergreen are coming on Monday to commission my system after the big changes from last week, where they'll fit Homely (I think it's highly likely that they will). I've also got some monitoring attached via a research project so I should be able to provide some empirical evidence.

At the end of this whole project (hoping it will be totally finished on Monday) and after a couple of months of running, there may be a cautionary tale to write, based on my experience. I'm just relieved that my installer, once the defects and quality issues had been observed by their certification body, then agreed to work hard to put it right. It's a shame it took a third party to get them to move from their original position that 'everything is fine...'

I'm pleased to read that you 'stuck to your guns', it is the only way to get poor installers to improve their game.