AirGradient Forum

How to turn off PM sensor fan during the night?

#1

Hi everyone,

I absolutely love my AirGradient One and check it every day! However, there’s one small thing that slightly affects my experience —> the noise from the fan inside the PM sensor.

During the day, when there’s more ambient noise, I don’t notice it at all. But at night, when everything is quiet, it becomes quite noticeable and a bit annoying.

I’m trying to find a solution to turn off the PM sensor (or its fan) only during the night while I sleep.
Is there any API, command, or script that can power it on/off on demand?
I can handle the automation side myself — I just need to know if there’s a way to control it through software or firmware.

Any ideas or guidance would be greatly appreciated!

Thank you in advance,
Radu

#2

Do you hear it ongoing all of the time or does it spin up and down on a regular interval?

I sleep with one right by me and I’ve never heard the fans at all, and minor noises are particularly annoying. So I think you are having an unusual experience. Would it show up on a recording you could send to support and if it is a sound that isn’t standard they might replace the sensor.

I’m not aware of a way to disable the sensor readings for that decide over any API or configuration. Could connect it to a small outlet to power it off overnight.

1 Like
#3

You had a good idea to record it.
Since the sound level is very low, I had to amplify it a bit to be audible to my phones microphone.
it seems that I can’t attach it here, even as a link to my google drive.
The sound is continuous as far as I observed.