Wrong dates on CSV export
Posted: 30.04.2021 11:47
I've received my brand new Aranet 4 a couple of days ago. I exported the CO2 measurements from the iOS app to my Dropbox and I realized that it has future dates in the log (see atteached log from my Dropbox). I've been experimenting with the measurements interval, changing the interval from 5 minutes to 1 minute and back. Does this affect the log? The qurious thing is that when I review the measurements history on the iOS app, the timestamps are correct. It's on the exported CSV log that they are wrong.
App version: 2.0.6
Posted: 02.05.2021 12:28
Hello. Your attachment is not visible, be so kind to send it with the question to email@example.com.
Posted: 05.05.2021 10:36
I have sent you an email with the log attached.
Having exported even more logs, what I can tell from examining them is that the Aranet4 does not actually record the time, but the timestamps in the log are extrapolated from the time of extraction and the current measurements interval setting. For example, if it is 10 o'clock in the morning and the current setting is on 5 minutes interval, it will interpret the stored measurements as being 5 minutes apart going backwards in time for all the stored measurements. That means, that if during the day I change the setting to 1-minute interval, the Aranet4 will indeed record measurements every minute, but if I change it back to 5 minutes interval before extracting the log, the app will incorrectly interpret the measurements as being 5 minutes apart.
Is this by design or is this a bug?
Posted: 05.05.2021 12:25
Aranet4 sensor doesn't have an internal clock, but only a timer. The measurement time in the exported file is calculated from application time and timer's interval setting. When you change measurement interval time to a higher value, measurements made in-between are ignored in the exported file.
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