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381 posts

Ultimate Geek

#269851 11-Apr-2020 14:32
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I am looking at upgrading my HWC from mechanical timers to something a bit more smarter.




I was looking to put this Heavy Duty Smart Switch on my HWC.


Then have a RaspberryPi plugged to a USB Smart Controller.


Then use something like Home Assistant to have logic like


- Check Spot Price every 15mins


- Switch on between 12am and 6am each day (and will be better as it will remember time in daylight savings)


- if Price is above threshold of 30c then over-ride and turn off


- if Price is below threshold of 12c then turn on




Has anyone done this? I need to get access to Flick Electric API first and try and get this working on Home Assistant

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16091 posts

Uber Geek


  #2459376 11-Apr-2020 15:23
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Is it worth the effort? A standard digital timer will work for multiple periods in a day, you probably need to heat it up every night (plus maybe a top-up during the day), and prices are fairly regular. I switched to another provider because I got sick of having to look at numbers constantly.

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  #2459377 11-Apr-2020 15:33
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My only thoughts is that could get REALLY annoying when you actually need hot water and have run out, but the price is high at the time.


Choice idea though, this is what automation is all about.


381 posts

Ultimate Geek

  #2459459 11-Apr-2020 17:03
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Well not sure that OpenHab or Home Assistant or Zwave is really that mature. I had a play around.. it should be a lot simpler than they have it.


I think I will shelve this until later when its similiar



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