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Measuring acceleration within a commercial plane
Hm... First of all: We are not really offering explicit options, but are handing our files to the system which compiles the options from the installed app. It is the same on iOS, so the option to save the data to a file is offered by the iPhone, not by us.

In principle, both systems do not offer direct access to the file system. The iPhone "save to file" function uses a small virtual section of the file system, which is either synced to the iCloud or offered through USB. On Android, you find very few apps that expose the file system and usually you cannot expect users to even know that there is a file system and how it works. (Actually, most users that are aware of the filesystem think of it in Windows terms from their early PC days and are confused when seeing that their SD card starts at something like /storage/emulated/0/)

This is why we decided against including a save-to-file option. First of all, we cannot provide it consistently across both platforms (on iOS there only is this little virtual section). Secondly, it is pretty much a design anti-pattern to expose these technical details to the user. The idea was, that the functionality can easily be installed through 3rd party apps, which forces teachers (who often think of smartphones in terms of PCs of their generation) to consider modern file sharing methods instead (which are much more intuitive to their students who may have never really used a PC). These other options tend to be Wifi or web methods, because smartphones are rarely attached to a cable except for charging.

So, on one hand, I would like to hear some thoughts on this from other users and I will certainly keep in mind that you are interested in a save to the file system feature directly in phyphox. Maybe, we will add it if more users prefer it this way.

Until then, I would like to find the cause of the problem, which can be a bit tricky since it does not happen on my phone (Google drive and Total Commander are working fine). So, I would start with the following questions:
  • Which version of phyphox are you using? (Usually, it is the most recent one, but I want to be sure that it has been updated.)
  • Which Android version is running on your Note 8? (I can emulate most systems, so maybe I can reproduce the problem this way.)
  • Have you tried other apps for the export? If so, which ones are working and which are not? (Hoping to see a pattern there.)
By the way, you can also transfer your data through the remote interface. So if you open your saved state and enable the "remote access" function in phyphox, you can simply open it in a web browser of the target device (which needs to be on the same network, for example in your home Wifi) and download the data through the menu in the top-right corner.

Messages In This Thread
RE: Measuring acceleration within a commercial plane - by Sebastian Staacks - 09-05-2018, 09:36 AM

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