Nest hot water control

Development
1

In the UK/Europe the Nest 3rd generation supports an on/off function for hot water. I have made a pull request to python-nest to expose some more of the properties for this functionality and am looking into sending commands to it using them (I think you can, but just needs a little more testing).

Meanwhile I was wondering how this could be set up within Home Assistant (at least to start with just to report the status) - should it be part of the current Nest climate component (using a check for has_hot_water_control), or should there be a new Nest climate hot-water component, considering it would essentially have it’s own ON/OFF state? (I’m still getting my head around the source code!).

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Hi there, I have been werking on the nest api (python-nest library for actually adding the checks).

I was wondering about adding the checks for hot water control and adding hot water control myself. I guess for tuening it on or off we could just use a button (which is basically what it is).

If you want to add a custom more-info screen to display temp / usage / setting temp. Than a new component (class) would be required

TLDR Check the nest platform code and add a button component for the hot water state (unless you want to create a custom more-info screen)

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Great! In the UK the temperature stuff is not useable - it’s literally used as just an on/off timed switch.

Having played a little, it looks like setting the boost off time also turns it on until that time.

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Hey, I’m interested in this functionality too. Just wondering is, or will this be integrated into home assistant? I just installed a Nest here in the UK and don’t see the hot water control/status being tracked by HA yet (0.33.4).

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Would be great to get this working.

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I’m also interested in this. I just installed the Nest generation 3 which has the hot water control. Of course it is just a timer control and has no temperature info. However, it would be easy to set up an esp8266 / mqtt temperature sensor to provide that input for any automation required. So the main thing needed is the on / off control for a definable time period, e.g. on for 30 mins. I mainly use solar for hot water heating but I need to boost it occasionally depending on the water temperature in the storage tank and whether anyone is home etc. Unfortunately I don’t have the programming skills to progress this myself but I would be very interested to know if any progress has been made with it.

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Hi guys was anything further ever done with the hot water integration?

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Hi, there is a php based solution. Check out this post by mtannerauo