GreatAlbatross

If it helps for a future purchase, Focusrite's external interfaces have been amazing for Linux support.

To the point where I didn't even notice; It just worked perfectly out of the box.

I'm assuming you've already checked this, but is your interface set to the same frequency/bit depth between Linux and windows? Or if it uses optical, whether it's set to the same word clock source.

I'm currently eyeing up an Airgradient One, which uses the SHT40.
Unfortunately, I don't have enough tinkering time at the moment to roll out much more kit.

In honesty, I use the relative humidity readings as more of a "it's dry" "It's OK" "it's moist", than expecting any sort of accuracy!
I've even considered mapping percentage ranges to "moist, normal, dry" in HA.

I should probably write a bot to auto-reply when someone pulls a state as a comparison.
(Or ask the resident flamingo nicely to write it 😀)

I'll put the gist of why hot weather can be a pain in the UK so it's in the thread, not aimed at you obviously:

• Most housing was built around coping with -5 to 25'c comfortably.
  Which for a long time meant no insulation, and a fire/wet central heating system.
  And not a damn was given about air-tightness.
• A lot of the housing pre-dates WW1
• Air conditioning was not commonplace at all when the majority of houses were built (you could argue it still isn't)
• Heatwaves were so infrequent, it wasn't worth the cost of installing air conditioning domestically.
• It gets muggy as hell, with the high humidity making it worse. (But again, it's variable, so tricky to justify spending money)
• Swamp coolers don't work due to the humidity
• Lots of people grew up with the weather being (generally) mild enough that opening a window to get airflow was enough to keep cool. (I've had family members open the windows on a 30' day to "cool" my 20' basement...)
• Leccy is expensive. This is improving with solar and plunge pricing, but most people will want to tighten up their house in other ways before spending £8/day cooling it.

With both our warming climate, and more kit being installed, things are changing, and people are adapting.
More people now understand that cooling the fabric of the house at night when it dips into the teens, then closing the windows in the morning, is a better way to keep it cool.
Building regulations stipulate significantly more insulation, air-tightness, heat gain control.
And air conditioning has dropped in price a lot.
For anyone curious, you can DIY a mini-split for about £500/room, or get a better quality one installed for under £2000.

On the UK theory test, this question used to have an answer of "offer them a cigarette".

Meanwhile in the map notes:

Me when I go to an area on holiday, and there is lots of fun mapping to do.

Absolute classic. When I hear OF, I want to hear this too.
Same with Harlem Shuffle and Jump Around.

I mean, that's where all my sensors are, and they're doing OK.

My outdoor sensors are classic 433mhz meteorology ones though, as I didn't want to mess around waterproofing zigbee gear.

I swear it's the blackout curtains. I'll draw them tight on the first night, then have a surprise in the morning if I didn't set my alarm.

I knew this would come up, which is why I threw in the "ok for consumer gear" line.
I don't have any super accurate sensors at home to test against, but to be honest, cheap hydrometers are best for vague ranges. "It's damp", "it's normal", or "It's dry".
Which is actually what I use it for: It's in the bathroom to send alerts to open or close the windows based on humidity and outside conditions.

Compared to the rest of the sensors in the house, when the windows are open and air in the house is normalised, it's within 5%, which is about all I could really hope for.

Meeting summary:

• Synergy promoted by Gerald
• Fourth quarter prediction estimate forecasts brainstormed by Jeremy.
• Coffee situation update from Mark.
• Level 4 agility in KCD reached by GreatAlbatross

Some meetings, I wish I'd bought a steamdeck.