• 8 Posts
  • 125 Comments
Joined 2 years ago
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Cake day: June 13th, 2023

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  • This is roughly what we have in the UK.

    For electricity, the standing charge is 61.6p/day, then 23.3p/kWh.
    And gas is 29.6p/day, then 6.1p/kWh. (The numbers vary, and you can choose to lock rates for the duration of a contract).

    There has been some discussion of it in recent years (after it doubled, thanks Putin).
    Whether it is fair for people using less energy…But in reality, everyone has similar 100 or 60A connections to the grid.
    There are tarrifs for very low users, where the standing charge is combined with the first kWh.

    Once I’m off the gas boiler, and on a heat pump, I may get my gas disconnected to save the standing charge.

    On a tangent, as you may be interested, we now have the option of flexible electricity pricing that tracks the wholesale rates for the day. Usually, it’s cheaper, sometimes even negative. Link.
    However, this week there has been a lot of expensive energy, so it’s been butting up against the £1/kWh limit!


  • The biggest one was probably a combo of having an anemometer, and heat/humidity sensors in each room.

    When it’s cold outside, the top floor of the house (loft conversion) loses more heat. But it loses significantly more heat when it’s cold, and the wind is blowing parallel to the floor joists.

    I realised that because they’re not perfectly sealed (old house), enough air pressure means that the floor void can easily hit external temperatures, meaning the rooms have cold on twice as many sides.

    I will (eventually) get some suitable insulation in them to stop this.





  • For a low tech solution, you could use cold chain labels.
    They indicate when a temperature threshold is breached. So you’d at least know when a vial was spoiled. They’re not cheap, mind, when you only want a few.

    But I know that’s not solving the problem in the way you wanted to!

    If you only need to know when a threshold is exceeded, you could make something simple using (for example) an esp with a PAYG SIM card and a temperature sensor.

    Then set it up to SMS an alert when temperatures go out of bounds. And pick the SMS up in HASS (various ways). That way, you’ll only be spending a few cents each time there is an issue.

    You could also use mobile data if you felt more fancy, and post straight to HASS.












  • I end up doing a lot of lazy maths, and remembering rough numbers.

    45MPG? That’s about 10 miles per litre.
    8 inches? Eh, 20cm.

    Anything remotely technical, I convert everything to metric (and actually take the time do accurately).
    Having the inch-fractions to mm table on the back of a ruler is very useful when using old drill bits and spanners.


  • I use them, and I love them.

    They’re banned from the internet, and never complain.
    I use both SD cards inside the cameras, and dumps over SFTP.

    The general standard of integration with HASS is very good (IR control, alerts, streams, etc.)
    If you want to access streams over a VPN, make sure that you configure the IP addresses manually in the app, rather than letting it auto-find (took me a while to work this out).

    Doorbell cam: Lovely bit of kit. Button press and person detection hooks in nicely with HASS things.
    I really like being able to answer delivery people (and be silly with visitors). 2-way audio works well in the app, I keep meaning to try integrating it with HASS now the latest version has capability baked in.

    810A: Decent picture quality, the only fly in the ointment is that it uses H265 for full res, and a lot of open source things don’t officially support it.

    510: Good value, and decent quality image. There is a firmware floating around that adds pet detection features too.