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Hypfer / esp8266-vindriktning-particle-sensor

Wifi MQTT Data Logging via an esp8266 for the Ikea VINDRIKTNING PM2.5 air quality sensor
Apache License 2.0
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The value does not fall below 200 #52

Open tiimsvk opened 2 years ago

tiimsvk commented 2 years ago

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.

hb020 commented 2 years ago

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.

hmax42 commented 2 years ago

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

tiimsvk commented 2 years ago

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

hmax42 commented 2 years ago

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