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  • AJStubbsy commented on AJStubbsy's instructable Smart Radiator Valve With Home Assistant3 months ago
    Smart Radiator Valve With Home Assistant

    You need a temperature sensor setup as a Generic Thermostat component. You set a target temperature of 15°C and if it's above that the GTc state will be idle. If the temp is below that the state will be heat (there's a hot and cold tolerance you can set). You can then use the state to trigger an automation.My setup is very convoluted. I have input boolean switches for a lot of things because I'm not directly controlling the heating, I'm simulating a button being pressed.I can't get the formatting right here but this is one of the automations I have, as an example.alias: Thermostat Heating On trigger: - platform: state entity_id: input_boolean.heating_switch from: 'off' to: 'on' - platform: state entity_id: climate.l_temp from: idle to: heatcondition: - condition: state...

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    You need a temperature sensor setup as a Generic Thermostat component. You set a target temperature of 15°C and if it's above that the GTc state will be idle. If the temp is below that the state will be heat (there's a hot and cold tolerance you can set). You can then use the state to trigger an automation.My setup is very convoluted. I have input boolean switches for a lot of things because I'm not directly controlling the heating, I'm simulating a button being pressed.I can't get the formatting right here but this is one of the automations I have, as an example.alias: Thermostat Heating On trigger: - platform: state entity_id: input_boolean.heating_switch from: 'off' to: 'on' - platform: state entity_id: climate.l_temp from: idle to: heatcondition: - condition: state entity_id: input_boolean.heating_switch state: 'on' - condition: state entity_id: switch.central_heating state: 'off' - condition: or conditions: - condition: state entity_id: climate.l_temp state: heataction: - service: switch.turn_on entity_id: switch.central_heating - service: automation.trigger entity_id: group.srv_automations

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  • AJStubbsy commented on AJStubbsy's instructable Smart Radiator Valve With Home Assistant6 months ago
    Smart Radiator Valve With Home Assistant

    For anyone reading this instructable, it's sad to say but this is no longer a cheap way to build a smart radiator valve. The linear stepper motors aren't available anymore at the price I originally stated.If you happen to find them then I'm sure there are lots of people who would be interested in buying a couple, so please post your findings here. Alternatively, if you can find a similar item then it would be great to modify this sRV.The motor description is: -Type: NMB Linear StepperPN: PL35L-024Best of luck tinkerers

    I think they would work just as well. Obviously there'd be a big alteration to the part file but the stepper motors will behave in a very similar way, it's just a case of finding out how many steps make up a full revolution of the stepper motor. You just tweak the sketch then to reflect the type of motor you use.

    You're right m-ice, unfortunately this instructable is no longer a cheap way to make your own smart radiator valve. I've looked all over the internet and these linear stepper motors are no longer available at the price I originally stated. I've posted a link to the cheapest motors I've found in the reply before this one, but they're still expensive. Such a shame.

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  • AJStubbsy commented on AJStubbsy's instructable Smart Radiator Valve With Home Assistant6 months ago
    Smart Radiator Valve With Home Assistant

    Hi kuhni, unfortunately they just aren't available at a reasonable price anymore. The cheapest I've found was from Germanyhttp://www.einausschalten.com/nmb-drives-linear-actuator-2phase-4wire-stepper-motor-5v9v-6v-motor-electric-telescopic-rod-slide-motor-stepper-motor-screw-lift-motor-p-176.html?language=en#.W7aEpGhKiwcIf it helps, the motor type and part number is:-Type: NMB Linear StepperPN: PL35L-024If you do find some it would be great if you could post back here.Bets of luck.

    Thanks very much. It's just a shame that these parts are difficult to find anymore - at least, not at the price I originally posted.

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  • AJStubbsy commented on AJStubbsy's instructable Smart Radiator Valve With Home Assistant9 months ago
    Smart Radiator Valve With Home Assistant

    That will be a project I look forward to reading! Best of luck DovidT, happy tinkering.

    Hi DovidT, If there's a spring/pin mechanism on your TRV then I can't see why this wouldn't work for your application, you'd need to redesign the 3D printed part, so it fits to your radiator valve.The main problem at the moment is we can't get our hands on the linear stepper motors, for a sensible price, any more. If you find some, or an alternative, I'm sure the other members on here would be interested in a link.

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  • AJStubbsy commented on AJStubbsy's instructable Smart Radiator Valve With Home Assistant9 months ago
    Smart Radiator Valve With Home Assistant

    Hi papamole. Can I ask where you got your components from for the project please? It's becoming increasingly difficult to buy the components and any knew sources would be a great help.

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  • AJStubbsy commented on AJStubbsy's instructable Smart Radiator Valve With Home Assistant10 months ago
    Smart Radiator Valve With Home Assistant

    Awesome! Thanks for taking the time to post about your success. If there's any help you need with the automation side of things just let me know. Best of luck.

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  • Smart Radiator Valve With Home Assistant

    Hi SturmGhost, I've checked and you're right. I can't find these linear steppers anywhere near that price anymore. I've listed the two ebay shops I used below. They don't show them in stock anymore but I suppose you could ask them?hj_021tongxianhaiy_95inliao

    Wow that sounds superb! Did you manage to buy the linear actuators at a reasonable price? @SturmGhost commented that he couldn't find them so cheap. I've had a look and they are about 3 times the price they were when I first posted the instructable, I thought you might have an alternative supply route. It was answering him that made me see your comment. P.S. I reverted my HASS config to use MQTT covers to control the valves, instead of the MQTT switches and then use an Input Boolean as the target for the Generic Thermostat, which in turn triggers an automation for when the cover should be controlled. This was because I had a problem where the MQTT switch didn't reflect the state of the valve because the valve would publish its state but the Generic Thermostat would override the state, ...

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    Wow that sounds superb! Did you manage to buy the linear actuators at a reasonable price? @SturmGhost commented that he couldn't find them so cheap. I've had a look and they are about 3 times the price they were when I first posted the instructable, I thought you might have an alternative supply route. It was answering him that made me see your comment. P.S. I reverted my HASS config to use MQTT covers to control the valves, instead of the MQTT switches and then use an Input Boolean as the target for the Generic Thermostat, which in turn triggers an automation for when the cover should be controlled. This was because I had a problem where the MQTT switch didn't reflect the state of the valve because the valve would publish its state but the Generic Thermostat would override the state, depending on whether it was in 'Idle' or 'Heat'. I'm confusing myself reading this back, so if you do get to that point I can share my HASSIO config. Good luck with your build!

    Hi CraigM169, sorry for not responding, I'm not sure how I missed your request. I'm guessing you don't need these now?

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  • Smart Radiator Valve With Home Assistant

    If you've looked/made a start on this Instructable in the past, I've changed the code again. This is to ensure the valve doesn't try to open/close if it is already in the desired state. I've also changed the Hass Component from a cover to MQTT Switch. This allows you to control the valves using a Generic Thermostat Component.If you haven't already installed it, I'd definitely recommend using the Google Assistant component as well. It's very satisfying to check room temperatures and control the valves and other components, using your voice.

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  • Smart Radiator Valve With Home Assistant

    Haha!! Well done mate, that's fantastic!! I tried to have mine as MQTT switches but it wouldn't work for some reason, so i went back to covers. Maybe it was something else that was causing problems. I'd love to have a look at your sketch. I only recently saw that it was broadcasting a wifi network and I wouldn't have a clue how to stop that. I've got a bit of snazy/OTT code in the config yaml, which might be helpful. I discovered that an action is basically a script, so I call for the cover to open/close, delay for a bit, check the state is what I wanted and if it's not, it triggers the automation again (one of my sRVs is well away from the Router so it's a bit hit and miss). I've got Google Assistant working now as well. You can tell it to change the target temperature of the Generic T...

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    Haha!! Well done mate, that's fantastic!! I tried to have mine as MQTT switches but it wouldn't work for some reason, so i went back to covers. Maybe it was something else that was causing problems. I'd love to have a look at your sketch. I only recently saw that it was broadcasting a wifi network and I wouldn't have a clue how to stop that. I've got a bit of snazy/OTT code in the config yaml, which might be helpful. I discovered that an action is basically a script, so I call for the cover to open/close, delay for a bit, check the state is what I wanted and if it's not, it triggers the automation again (one of my sRVs is well away from the Router so it's a bit hit and miss). I've got Google Assistant working now as well. You can tell it to change the target temperature of the Generic Thermostats and control the valves, amongst other things.

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  • Smart Radiator Valve With Home Assistant

    Thanks for the update, I was wondering how you were getting on. I think you'd be fine printing the connection. I'd do what you mentioned before and take the screw ring off the old valve and fit it on to your 3D printed bit. You could thicken up the hexagon bit and maybe even drop something metallic into the print to stop potential warping?

    I can't remember if you said you already have temp sensors or not but that's something worth considering as well, as they will really help tailor the operation of the valves for each room.

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  • Smart Radiator Valve With Home Assistant

    Hi radeonorama,Sorry but I purposely didn't put direct links because the prices of the components were changing regularly and I used a couple of different sources. I think it's better to shop around, so you don't end up paying more than the indicative costs I added to the components description. The component descriptions and the shop I used to buy them should get you close enough though.One addition I would suggest is to put a spring on the actuator pin. You can use the retaining pin that holds the plastic collar in place and just trim the pin back slightly, so it doesn't foul on anything when it's moving in and out. This will help counteract the spring that's in the radiator valve. I'll add some pictures once I get that addition standardised because at the moment I've been recycling s...

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    Hi radeonorama,Sorry but I purposely didn't put direct links because the prices of the components were changing regularly and I used a couple of different sources. I think it's better to shop around, so you don't end up paying more than the indicative costs I added to the components description. The component descriptions and the shop I used to buy them should get you close enough though.One addition I would suggest is to put a spring on the actuator pin. You can use the retaining pin that holds the plastic collar in place and just trim the pin back slightly, so it doesn't foul on anything when it's moving in and out. This will help counteract the spring that's in the radiator valve. I'll add some pictures once I get that addition standardised because at the moment I've been recycling springs out of random items, so I haven't really settled on the optimised solution. They're still working great though, I just think it'll help with the life of the stepper motors.Best of luck, I'm really looking forward to hearing from someone who's been able to make these and if there's other improvements to be made.

    What country are you in? These are the TRV heads I used:-https://www.screwfix.com/p/white-chrome-angled-trv...They're not too expensive and the bonus would be that you'd have back-up TRVs.If you'd rather use your existing TRVs then I'm happy to share the part file. I think you'd have to tackle the modifications because you'll need to make sure the linear stepper motor actuator remains the correct distance from the radiator valve pin.It's not really obvious how that cap comes apart. If you are going to use those I think you're going to have to go for good old fashioned brute force :)Let me know if you still want the part file and I'll have a go at attaching it to the instructable.

    I've added the part files to step 4. You'll probably need Inventor 2018 to open the files, as I don't think they're backwards compatible and they got migrated to this when I last opened them.6mm M3 screws will be ideal for attaching the board.Best of luck!

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  • Smart Radiator Valve With Home Assistant

    There was a problem with multiple devices having the same Client ID and so I've updated the Arduino IDE code, so that this can be personalised for each device.

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  • AJStubbsy's instructable Smart Radiator Valve With Home Assistant's weekly stats: 1 year ago
    • Smart Radiator Valve With Home Assistant
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  • Smart Radiator Valve With Home Assistant

    Thanks very much. I'd love to here how you get on making one of these as well. Best of luck.

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