News How To Build an Air Quality Alert Light with Raspberry Pi Pico

Kind reminds me of this old project we did in uni by using the SDS011 sensor. For monitoring PM2.5/PM10 data.

 
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For advanced usage, switch to C++ (I know CircuitPython can't put the processor into and out of sleep mode, and I assume MicroPython can't either, otherwise I'd say stick with MP) and sleep the mcu, using an interrupt on the button press to wake it up, do the activity, and put it back to sleep. Then you can run it for ages on a battery.