These have to be the least accurate things I have ever seen.
The rectangular one is accurate or accurate enough and has been what I used but I noticed files all had cutouts for these round hygrometers…
Well from my 6 pack 1 is within a margin of error to even be useful.
I get they aren’t expensive but seems like a waste of money for this bad.
Mine are pretty consistent, max. 5 percent points difference between them. Cheap brand from a big internet warehouse.
Lucky. Pretty sure these are the same from the same internet source but the swing on them is insane. They all showed as 75% in the bags but spending some time with them I realized the complete lack of accuracy when I realized my humidity wasn’t what it was reading.
I have since taken some apart and cleaned them out but now those are just under the humidity by the same percent they were over before.
The analogue one I own (round body) can be tuned/adjusted by a small screw on the back. Maybe that’s an option?
Is the one built into the AMS not good enough? I get that it only gives a level between 1 and 4 but it’s been fine for me with PLA and PETG 🤷♂️
I am doing some testing with a new desiccant and wanted to have some extra data for humidity. So it is honestly fine for function but not what I was going for.
“It’s on 3 now, I should do something.”
Does something
Waits two hours
AMS says 2
“Is it at 2.0 and dropping to 1 any moment now, or is it stabilized at 2.9? Or…”
I guess it’s not important, but I really would like to have some decimals. It’s not that I care about accuracy, but I would like to be able to see which direction it’s going.
@Krauerking you could look at calibrating the hygrometers or at least the offset.
https://www.stevejenkins.com/blog/2014/06/how-to-calibrate-a-hygrometer-humidity-sensor-using-the-salt-test/
Two point calibration with calcium chloride and sodium chloride might be even more accurate
Nah these do not have a calibration method.
Cheap and seemingly what the average consumer uses based on the 3d files all using them but not calibratable and wayyyyy off.
@Krauerking ah but you can measure the offset. A two point calibration should cover your measurement range. Not ideal but you could get a reading.
Yeah I did measure all their offsets actually already in a rougher method than the salt water trick. I’ve so far got
+27, +18, +14, +13, and +7 and 1 that is within +1 margin of error.
I dunno that just seems like a waste of electronics components. I can use them but… Yuck right?
@Krauerking@lemy.lol Hygrometers are only as good as their components. Buying a DHT11/22 or SHT31 from AliExpress ($1-2) alongside an ESP8266/32 and you’d have much better results than buying these “are my cigars dry” pucks.
I don’t even think these would helpfully let you know if your cigars are dry. 2 of them barely changed humidity over time and I noticed the sensors were flush with the board instead of exposed.
I ended up buying inkbird ITH10s because I generally don’t go completely self made since I’m not overly tech crafty and more work with my hands crafty.
I’d really love to know how, once having purchased and aquired these two parts, how to join them, and get them powered, and to display. this is like secret engineering knowledge i’d love to be walked through
LOL same. And this is why I bought bad tech. It’s a whole wild world if you can actually take electronic components and just wire them together and program them yourself.
I’ve been through all the junk Amazon hygrometers, name brands, no name, all junk. How has your experience been with the inkbird ITH10? I hope abe writes up a walkthrough for the DHT11/22 and ESP8266/32 setup, it’d be neat to order from Ali and work something up.
@shoulderoforion@fedia.io I have about $150 worth of Ali parts and components coming just this month for whole house monitoring for this kinda thing - temp, humidity, CO2, VOCs, pressure, light sensors etc. Would be glad to ping y’all once that writeup is done :)
I’ve had massive differences in readouts in DHT22 from aliexpress. They are really not good sometimes
@callcc@lemmy.world SHT31/41 are better than DHT22 tbf. DHT would have a variance of about 2-5%. It also takes a while for it to stabilize.
Figures, I just bought two for the AMS lite.
