Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

PM2.5 and PM10 caping at 150 ug/m3 #131

Open
PetitSphincter opened this issue Feb 20, 2024 · 12 comments
Open

PM2.5 and PM10 caping at 150 ug/m3 #131

PetitSphincter opened this issue Feb 20, 2024 · 12 comments

Comments

@PetitSphincter
Copy link

PetitSphincter commented Feb 20, 2024

Using a Dyson Purifier Humidity+Cool with this integration. Works like a charm. But during the 2 years i've used this integration i noticed something.

The value of PM2.5 and PM10 are caped at 150 ug/m3 while the dyson cloud app or the display screen can show values up to 999 ug/m3. I just reproduced it right now by vaping right into the filter :

image

While the value displayed on the screen was caping at 999 ug/m3

All the value between 999 ug/m3 and 150 ug/m3 on the screen were at 150 ug/m3 on HA. Once it decreased under 150 ug/m3 values are the same, so it's not a problem of proportion just caping for values above 150.

@dotvezz
Copy link
Member

dotvezz commented Feb 21, 2024

Interesting! I'll look into this. For the time being would it also be possible to get a screenshot from your Dyson app showing the 999 value? I'm curious how it registers, and it could help us in understanding the signals.

@PetitSphincter
Copy link
Author

PetitSphincter commented Feb 21, 2024

Downloaded the app back (trying to get rid of cloud apps :) ) and destroyed my lungs but here's a screenshot :

Screenshot_20240221-193551

It's quite hard to reach 999 ug/m3, hopes that 700 is enough (got to destroy my lungs even more)
And here's how it shows in HA :

image

You can clearly see when it caps around 19:35

@dotvezz
Copy link
Member

dotvezz commented Feb 21, 2024

Wow, okay that helps contextualize things a bit. I also got a chuckle realizing that it's literally off the chart.

One last question, are you able to run this tool while sacrificing your lungs for science one more time?

If you'd rather not, I totally understand. I don't vape but I have some friends who do, and I KNOW they'll get a kick out of vaping at my fan lol.

@PetitSphincter
Copy link
Author

I'm not home currently coming home next wednesday, i just put a reminder for next week to try this out

@codyc1515
Copy link
Contributor

You could also just spray something in the air, like “air freshener”.

Thanks @PetitSphincter

@PetitSphincter
Copy link
Author

This tend to raise VOC more than PM. Plus it's really hard to reach high level of PM with it. At least with air freshener i have

@PetitSphincter
Copy link
Author

PetitSphincter commented Feb 28, 2024

Struggled a bit to find the IP but after an angry IP scanner here's the results :

image

It seems like the same thing is happening here. The third scan is the one where it was way above the 150 ug/m3 (700 ug/m3). But here this point is at 0149 which is, i suppose, 149 ug/m3. All the other line where below on app, and coherent with the tool

@dotvezz
Copy link
Member

dotvezz commented Apr 30, 2024

@PetitSphincter thanks a ton for that info. It's really interesting, and kinda frustrating. Some devices to have values they send over MQTT which are flagged as "high resolution" in the mobile app. I'll investigate those values and their availability. If I'm able to work out a solution, I'll get back to you here!

@RedEarth1
Copy link

I've noticed this too, so I monitored my fan using MQTT explorer while giving the fan a quick squirt of deodorant and here's one of the messages:

{"msg":"ENVIRONMENTAL-CURRENT-SENSOR-DATA","time":"2024-05-01T18:12:07.000Z","data":{"tact":"2963","hact":"0054","pm25":"0149","pm10":"0149","va10":"0013","noxl":"0007","p25r":"0999","p10r":"0999","hcho":"NONE","hchr":"NONE","sltm":"OFF"}}

pm25 and pm10 are the values which were showing in HA (both 149) but as you can see p25r and p10r as both showing 999 which is also what was showing in the Dyson app at the time, so maybe these are the 'uncapped' values that it uses??

@dotvezz
Copy link
Member

dotvezz commented May 2, 2024

@RedEarth1 Yep, p10r and p25r are the "High Resolution" values. Thanks for looking into it!

The only reason I don't just immediately switch this integration to using them is because I'm not sure about the availability of them on the different devices and generations.

@Dennis-Otto
Copy link

Just bought the Purifier Humidify-Cool Formaldehyde two days ago and I am experiencing the same issue regarding the PM-readings.
Yesterday there was a spike of more than 270 PM2.5 (looking at the Dyson App), but the highest PM2.5 value in my HomeAssistant during this time was only 132.
The same with PM10: Dyson App shows more than 270, HomeAssistant shows 104.
Looks like all values are off..
HCHO: Dyson App shows 0.011 and HomeAssistant shows around 0.018
VOC: Dyson App shows 3, HomeAssistant shows 4.74
NO2 looks correct, but for now I don't have any spikes to compare.

@PetitSphincter
Copy link
Author

@RedEarth1 Yep, p10r and p25r are the "High Resolution" values. Thanks for looking into it!

The only reason I don't just immediately switch this integration to using them is because I'm not sure about the availability of them on the different devices and generations.

Do you need any help on this ?

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

No branches or pull requests

5 participants