phyphox in Taipei

Last week, I had the chance to speak at the Annual Meeting of the Taiwan Physical Society and to give a workshop at the National Taiwan Normal University. For this I have to thank Professor Chih-Ta Chia for the invitation, the warm welcome and the great hospitality. The same thanks go out to all the friends, teachers and students I met there who helped to make these three days in Taipei unforgettable.

If you are interested in the talk, you can see the recording here:

Version 1.0.10 (hotfix for iOS)

If you are using an iOS device (specifically an iPhone older than the iPhone 6s or most iPads) and tried our latest update, you will quite certainly have encountered the error “rate mismatch”. Sorry about that, we have just released version 1.0.10, which fixes this. (Since this only fixes the iOS issue, there will be no 1.0.10 on Android.)

If you are working with your own phyphox experiments, the following details might be relevant to you:

The problem here is, that there is no guaranteed way to force a certain audio sample rate. You can set a preference, but the system might chose to ignore this (for example when using AirPlay, which forces 44,1 kHz). Since many experiments require the exact data rate for their calculations, we inserted a check, which tests if we actually got the correct rate. Turns out that this resulted in the error on all older devices which natively run at 44,1 kHz because a) we checked to early and the desired rate might still be set correctly and b) there are several more scenarios which prevent switching to a specific rate. Therefore we now allow that the system sets a different rate and modified our file format, so that the experiments can get the actual sample rate and use it for their calculations.

This means, that at the moment the file format in iOS supports this new output while the Android version does not. We will fix this with the next update soon, but if you rely on the exact sample rate for your own experiment, please let me know, so I can help to get this right now.

Version 1.0.9 (minor bugfixes)

Version 1.0.9 was just published to address a range of minor problems (we are still working on the big update with Bluetooth and interactive Graphs). This most important fixes of this update address crashes related to the remote access on iOS. Thanks to everybody who reported these bugs.


Changes on Android and iOS

  • Location (GPS) experiment now calculates the distance travelled.
  • Pendulum experiment shows a genreic results page first.
  • Minor optimizations of remote access communication.
  • Minor optimizations of text in experiments.
  • Fix: Inclination experiment now resumes at correct timestamp.
  • Fix: Jittery axis in roll experiment.

Changes on Android

  • Allow installation on external storage.
  • Added some MIME types to allow opening phyphox files from more third-party apps.
  • Correct GPS height from WGS84 ellipsoid to geoid if possible.
  • Adaptive Icons for Android 8.0.
  • Fix: Order of external links now matches definition in custom experiments.
  • Fix: Rotation lock ignored in main menu.

Changes on iOS

  • Wider text fields.
  • Icon-Positioning in tool bar no longer optimized by the app as this lead to problems on some iOS 11 versions.
  • Remove subject text when sharing data or screenshots as this generates multiple files in iOS and leads to more trouble than it’s worth.
  • Fix: Crash when using the remote access in hotspot mode.
  • Fix: Crash when saving a saved state a second time.
  • Fix: Crash when activating remote access while port 80 is already in use.
  • Fix: Crash when the system does not support an audio rate of 48 kHz (for example when using AirPlay).
  • Fix: Crash when external link has not been translated in custom experiment.
  • Fix: Highlighted link not visible if not translated.
  • Fix: Some sensors do not produce data on iPods (fix not tested).