I haven't seen this happen in part because it runs a /long/ time on a battery, but I have seen it when running on a solar panel without enough sunlight. It would fail and reboot every second or so, so the light would blink.
Recently we changed the firmware so that it waits 2-3 seconds to start up. The idea was that it'd try to run for 2-3 seconds, before turning the light on, so that it could "test" whether there's enough power. And if there was, it'd start showing a light. Otherwise, it'd just stay dark (although you may see some of the really tiny lights blinking as it boots up).
That way, if power is too low, it wouldn't annoyingly blink a lot, but rather would reboot over and over but never get to the point where the light goes on. We're still testing how well this works.
On Mon, May 20, 2019 at 2:10 PM \<firstname.lastname@example.org> wrote:
Public Lab contributor stevie just posted a new research note entitled ' What happens to the simple air sensor when the battery pack runs low?':
Read and respond to the post here: https://publiclab.org/notes/stevie/05-20-2019/what-happens-to-the-simple-air-sensor-when-the-battery-pack-runs-low
Interested in thinking about things that can happen in demoing/using a simple air sensor.
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Thanks @Warren (and @Stevie) for this info. Recently I fully charged the battery bar but after plugging in the "traffic light" sensor, the display stayed white even with high generated PM2.5 levels.
Your ability to create a light and small Plantronics sensor-battery combination is nonetheless very interesting: if the sensor could also write data to an SD card (as it does in PurpleAir SD models), I would like to know how much this all weighs and contact my two drone pilot colleagues. If feasible, I think it would be fascinating to measure PM levels at different altitudes and positions relative to a frac sand mine.