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ASC beim CO2 Bricklet deaktivieren


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gibt es eine Möglichkeit die automatische Kalibrierfunktion (ASC) des Sensirion SCD30 CO2 Sensors zu deaktivieren? Wir nutzen 12 dieser Sensoren für bauphysikalische Experimente und würden ASC gerne deaktivieren, aber finde dazu nichts in der API Beschreibung.

Danke im voraus...Gabriel

Edited by gabrojas
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Thanks! That helps already a lot, I had read it before, but after reading it again I still don't know if I can switch it off via API or if I have to change sensor firmware. A short answer on that would be highly appreciated, then I would know if feasible for me or if I need to involve collegues...Thanks

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Hi Gabrojas,

It is not possible to switch ASC on/off via API with the current firmware.

That other thread ultimately led to firmware 2.0.3, which forces ASC on at startup. Before that, at least some CO2 Bricklets erroneously shipped with ASC switched off.

I would welcome the option to control ASC manually, but if you know how to build firmware, it might be feasible to implement yourself. This is the diff for the above FW change.

Hope this helps.

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  • 3 weeks later...

Thanks Superp,

Do you know: does that mean that if I install firmware 2.0.2 the ASC will be turned off? The changelog for 2.0.3 says "Make sure ASC is enabled on each startup", but does that mean that ASC is disabled with 2.0.2 after a startup or not necessarily and if ASC is activated (now with 2.0.3) it stays activated, even if you flash with 2.0.2?

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  • 2 weeks later...

I don't know.

Did you read the thread I linked to above?

Firmware < 2.0.3 did not touch ASC, it was assumed to be activated during manufacturing.

But, apparently, at least some Bricklets were shipped with ASC not activated. So, I would say, a Bricklet that has never run 2.0.3 has ASC in an unknown state.

2.0.3. activates ASC.

2.0.2. and older do not touch ASC.

So the question is: does the Bricklet retain the state of ASC between restarts?

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