AirGradient Forum

Indoor Monitor I-9PSL PM 2.5 reading is often different on display than readings I see on Windows app

Support
#1

Random checks of the display on my Indoor Monitor has been telling me the PM2.5 levels over the past 8 hours has been telling me the PM2.5 levels are zero. When I look at the PC app over that same time period the Windows app tells me the Indoor Monitor PM2.5 levels have ranged from 4 to 5 over that same 8 hour time period. The PC app has never shown below 4. I am using the EPA calibration formual for PM2.5.

This is typical of inconsistent readings I have seen over many months between the Indoor Monitor display itself and the data presented in the AirGradient PC app.

Please explain why I am seeing this discrepancy?

#2

Hi @amorris101,

It sounds like the calibration is not being applied on the device’s display.

Are you also using Home Assistant with your monitor?

#3

Yes I have the AirGradient integration installed in Home Assistant. What impact does Home Assistant have on the issue I posted about?

#4

In Home Assistant, could you please locate the settings for your AirGradient monitor and change the ‘Configuration Source’ option from ‘Local’ to ‘Cloud’? This will resolve the issue you are having.

By default, monitors added to Home Assistant will take their configuration settings from Home Assistant (locally). This means that any settings adjusted on the AG Dashboard will not be applied to the device. By setting this to Cloud, the device and HA will also receive the corrections applied on the AG Dashboard.

#5

Should I change the ‘Configuration Source’ option from ‘Local’ to ‘Cloud’ for both my indoor and outdoor monitors?

#6

If you have it registered with the AirGradient Dashboard site, then I would try changing your Configuration Source to Cloud so it gets the config from there and see if your values change.

You can always change back to Local later

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