03-20-2023, 04:44 PM
Unfortunately, system times on smartphones can be quite out of sync, up to several seconds. Sites like https://www.time.gov display how much the clock is off. You should take the result with a grain of salt: the rather simple algorithm is described on the “about” page…
Utilising these offsets, you might get a better time synchronisation. We might include something like this in future phyphox versions, however, we certainly need to do some research on the best way – and privacy protection.
There also appears to be an offset in the amplitude that could have many causes, hardware and software. Please note that “linear acceleration” is a virtual sensor that typically includes data from gyroscope and magnetometer, so-called sensor fusion.
Utilising these offsets, you might get a better time synchronisation. We might include something like this in future phyphox versions, however, we certainly need to do some research on the best way – and privacy protection.
There also appears to be an offset in the amplitude that could have many causes, hardware and software. Please note that “linear acceleration” is a virtual sensor that typically includes data from gyroscope and magnetometer, so-called sensor fusion.