Tech, and mince pies

We have environmental sensors in the house. They are linked to HomeKit (via a firebrick, and raspberry pi, don't ask).

My phone went mad, telling me several of the rooms had High CO₂. This happens occasionally in the kitchen (aka living room) when we have a few people around, but it is only the two of us, and it is lots of the rooms in the house.

I checked, not the loft, not the outhouse, so not coming from outside it seems. But several rooms throughout the house!

Seems I have found the answer...

It seems that "Vinegar ( ethanoic or acetic acid ) is used in pickles and mincemeat and ... The acid reacts with sodium hydrogen carbonate to produce carbon dioxide ."

So yes, mince pies are picked up by the technology! wow.

They do look yummy though :-)


  1. I always thought the danger posed by mince pies was to the waistline - I had never considered asphyxiation!!

  2. Bong! Global Warming caused by Mince Pies. Greta advises everyone to eat raw turnips instead.

    1. https://github.com/revk/ESP32-EnvMon and a home assistant thing on a rasp pi.


Comments are moderated purely to filter out obvious spam, but it means they may not show immediately.

No No-bell prize

I wanted to improve our doorbell... Yes, that is dull. But the main change is not the bell (a nice, old style bell in the kitchen, which is ...