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Published 20 hours ago • verified publisher icon Hypfer

The value does not fall below 200

Open tiimsvk opened this issue 2 years ago • 4 comments

Not sure how to fix incorrect display values? He's been showing me 200-260 for some time. And it will never go down. I also tried to vacuum and it didn't help.

tiimsvk avatar Feb 20 '22 16:02 tiimsvk

Vacuum is not enough. I found that you need to regularly dismantle the sensor completely, and blow compressed air through the sensor (I used 3 bar, probably overkill). This is how far I dismantle it (just unscrew everything, no need to desolder or cut glue): IMG_3111

But even that no longer works lately. Trying ultrasound cleaning now. And even then, it takes some time (have seen 12 hours) for the values to drop. It seems to have some memory.

hb020 avatar Feb 21 '22 12:02 hb020

i had a similar problem, but i solved it by power cycling the unit https://github.com/Hypfer/esp8266-vindriktning-particle-sensor/issues/43#issuecomment-1061440029

hmax42 avatar Mar 08 '22 06:03 hmax42

The complete disassembly and cleaning of the sensor also helped me. Subsequently, with the passage of time, I restarted the sensor twice. Now, after 2 weeks, the data is still fine

tiimsvk avatar Mar 08 '22 08:03 tiimsvk

and again i powercycled my units, see the graph from one of them: image

hmax42 avatar Mar 27 '22 09:03 hmax42