# Sonoff airguard 2.5

**URL:** <https://forums.pimoroni.com/t/sonoff-airguard-2-5/28626>\
**Category:** Support\
**Created:** [January 21, 2026, 10:37am UTC](https://forums.pimoroni.com/t/sonoff-airguard-2-5/28626 "2026-01-21T10:37:57Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![illumeo](https://avatars.discourse-cdn.com/v4/letter/i/9fc29f/32.png) [@illumeo](https://forums.pimoroni.com/u/illumeo)\
**Post date:** [January 21, 2026, 10:37am UTC](https://forums.pimoroni.com/t/sonoff-airguard-2-5/28626/1 "2026-01-21T10:37:57Z")

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Hi

I have just got my sonoff airguard pm2.5 while the temp and humidity sensors gave reading immediately, the pm 2.5 and 10 are still showing 0 after 15 minutes. Is this normal? Have i missed something in the setup?

Thanks

Stuart

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**Author:** ![hel](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/hel/32/6075_2.png) [@hel](https://forums.pimoroni.com/u/hel)\
**Post date:** [January 21, 2026, 10:57am UTC](https://forums.pimoroni.com/t/sonoff-airguard-2-5/28626/2 "2026-01-21T10:57:19Z")

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Mine is reading 0s most of the time in our office also (though I’ve occasionally seen 1s and 2s).

I guess putting it near a particulate source would be the way to check it’s working - I’ve found making a bacon sandwich is a reliable way of making the particulate levels spike at home :)

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**Author:** ![illumeo](https://avatars.discourse-cdn.com/v4/letter/i/9fc29f/32.png) [@illumeo](https://forums.pimoroni.com/u/illumeo)\
**Post date:** [January 21, 2026, 11:03am UTC](https://forums.pimoroni.com/t/sonoff-airguard-2-5/28626/3 "2026-01-21T11:03:11Z")

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Well the dog will be happy if i am making bacon sandwiches for testing! did not expect “domestic” air to be quite so clean.

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**Author:** ![alphanumeric](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/alphanumeric/32/2729_2.png) [@alphanumeric](https://forums.pimoroni.com/u/alphanumeric)\
**Post date:** [January 21, 2026, 9:20pm UTC](https://forums.pimoroni.com/t/sonoff-airguard-2-5/28626/4 "2026-01-21T21:20:48Z")

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As one dog owner to another, what happens to the readings when the dog farts. :P :)

I have many weather sensor setups scattered around the house, but that’s one thing I don’t monitor. Just temp, humidity and pressure, and some light sensing for UV Index monitoring.