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  • radeonorama made the instructable Smart Radiator Valve With Home Assistant3 months ago
    Smart Radiator Valve With Home Assistant

    Well it happened! The Pink is for my 3yo daughters room as she's obsessed with anything ink that comes out of the 3d printer. White in the lounger and the Red was my test print which has now ended up in the bedroom. I've made a few mods to your design, one in particular was cutting out a section in the top of the stepper motor/base of the driver. I have soldered the steppers cables directly onto the bottom of the board which makes for a really easy fitting. Then all others were for my attachment to the radiator. I now have a 2 screw piece section which attaches to a new thread on the original base. I originally designed a similar piece to that on the existing trv with several vertical cutouts in the hope the metal screw ring would be able too slide over the top but the plastic kept snap...

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    Well it happened! The Pink is for my 3yo daughters room as she's obsessed with anything ink that comes out of the 3d printer. White in the lounger and the Red was my test print which has now ended up in the bedroom. I've made a few mods to your design, one in particular was cutting out a section in the top of the stepper motor/base of the driver. I have soldered the steppers cables directly onto the bottom of the board which makes for a really easy fitting. Then all others were for my attachment to the radiator. I now have a 2 screw piece section which attaches to a new thread on the original base. I originally designed a similar piece to that on the existing trv with several vertical cutouts in the hope the metal screw ring would be able too slide over the top but the plastic kept snapping. This way enables me to screw the screw ring on and locks in place nicely. I made quite a lot of mods to the code too. First one was to disable to esp's AP mode to stop it broadcasting itself as a wifi network. Then the other mods were to make it more state aware. I found I could send on or off twice with your code which was meaning the stepper was trying to turn itself double on or off. I also changed home assistant to utilise the trv's as switches rather than covers just so I have nice toggle switches in the UI rather than the up/down/stop jobby. I'm still working out my automations but think i have it down quite nicely. I went down the route of having a generic thermostat per room which controls the heating switch with a proxy input toggle between them all to decide if the heating needs to stay on or off based on the target and current temps are all of the climates in that group. I then have a slider which I have configured to control all of the target temps in one go for easy use, but if I find one room is getting a little too warm, then I can also turn it down manually. Still a WIP but definitely working well so far!

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  • Smart Radiator Valve With Home Assistant

    That metal idea is a great call! I may well do that. I'm wondering though if it might just be sensible to go buy a load of the trv's you used and save the hassle! I do like a challenge though!

    Yeah, I have Wemos D1 Mini's in nice 3d printed cases with little LCD screens running Easy ESP along with DHT22's They're already nicely hooked into HASS making decisions on the heating so i'm hoping your smart TRV's will be an almost seemless integration!

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  • Smart Radiator Valve With Home Assistant

    Just a quick update for you, if you're interested. Sadly I'm still waiting on a lot of the components. Ordering from china was the only way i could seemingly get the price down to the ones you quoted. I've ordered enough for 3 trv's for now, just to prove the concept. I'm still unsure about the physical connection at the minute but the files you posted were easily imported into fusion so that's great. The "data panel" in fusion 360 just converted them perfectly. I'm debating cloning the metal connection ring and 3d printing it but fear the heat of the rad may make it warp. :-/ Once I start getting the things through and make some headway on the project, I'll let you know how i get on. :-) cheers!

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  • Smart Radiator Valve With Home Assistant

    In the UK in the "Sunny English Riviera" haha. Thanks for sharing the Screwfix ones, those may have to be the way I go. If you don't mind sharing the files I'd quite like to mess with it, if you could include the top that'd be good. I may change the shape or look at changing to a wemos d1 mini, well, assuming I have the pinouts on it actually. Actually, on that note, I may have missed it but i couldn't see a reference to how you attach the esp8266 to the printed housing? You insert the nuts then use what? something like a 6mm M3 Cap Hex Head screw?

    Nice! Thanks for that, I almost have my basket of items ready for purchase. I've setup for 3 just for testing then will venture into all of them once I have the first 3 made nicely. Can I ask if there is any chance you might be able to help modify the mount point for the trv at all? Or perhaps make the file available? I'm working with a totally different trv to yours and I can't even work out how it comes apart! haha See the picture for what I have. I'm wondering if I can print (and if it will be strong enough!) the base part to connect onto the metal screw ring as it looks like I should be able to get the screw ring off easily enough. Any thoughts would be greatly appreciated! I'll definitely keep you updated on my progress. Just a bit of a wait on some of the china parts!

    Amazing! Thanks so much! I'll have a go at importing into fusion 360 (my general design software) i believe i should be able to use their "data panel" which will convert for me. I've not used inventor before. I'll let you know how i get on! :-)

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  • Smart Radiator Valve With Home Assistant

    Amazing! This is Exactly(!!) what i'm after. I already have my Worcester Boiler rf signals sniffed and now controlled by HASS but really want to control each TRV. Is there any chance you might be able to post direct links to the products needed to produce the full thing?

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