Extending the life span of the PMS5003 sensor

Components
#21

Thanks for finding and using my changes.

I increased the time the sensor is enabled to 45 seconds. That gave a more comparable result to my two other PM2.5 meters, similar to before introducing the life span changes.

Btw, I did notice that turning on the fan gives some seconds of higher and unstable fan-speed. Not sure if this might impact the life-span of the fan (while trying to increase the life-span of the laser).

Left my changes, on top of Themi’s, here: GitHub - rhermsen/AirGradientUpgrades: Various software upgrades for the AirGradient Pro 3.7

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#22

I just looked up the sensor, sells for $40 shipped on Amazon in the US.
At that price - while not totally cheap, that’s about $10 a year. Probably most people should just do what they’d do anyway and leave as is. In 4 years we might have better and/or cheaper sensors and AirGradient devices available.

#23

We have many PMS5003 still working after four years without issues. If you are not living in a very polluted environment they will probably last longer than 3 years.

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