MetaBase download data
I have several Motion R, firmware 1.3.3, hardware 0.1, model number 5.
I use them to log data.
I tried to use MetaBase app on PC Windows 10 x64, i7-3770, 16 Gb RAM.
First I config 4 Motion R for start logging 50 Hz accelerometer and gyroscope. After 15 min of logging I capture them. The data starts downloading. 1st, 2nd, 3rd devices succesfully ended the download, but the downloading time was 1 hour (!) for each. This download time is very strange. Sometimes data is downloads as quickly as it was recorded, especially for very short records - for example for 30 seconds of logging the data downloading time is about 30 s. But when log time is greater than some threshold download time became the maximum - about 1 hour. It seems like it is the time of full board memory download (but I don't need the full memory, I need only the data I just recorded for 15 min). In some experiments I got the approximate board memory value of 36 Mb.
Ok, the data from 3 devices is downloaded. But when it starts to download the data from 4th device, the app rises an error (without any notification) and closes automatically. I open MetaBase again and see that the data from first 3 devices is lost - I cannot download it again. At least, in capture list I see the 4th device. When I start downloading its data, the app closes again. The same result I get every time since then.
So, I lost the data, and I can't use the 4th Motion R on this PC anymore. I tried to reset the device, I tried to update the firmware, I tried to reinstall MetaBase on PC, nothing works, the 4th device is still in capture mode and still cant be captured due to some error.
First problem: data download time ambiguously depends on logging time and usually this time is too long.
Second problem: I lost the data from 3 boards.
Third problem: I can't use 4th board on this PC anymore (at least, I can use it with my other devices on Android)
And some other times I got another problem:
Fourth problem: The download data is not about my recent logging experiment. It is about one week before.
I also have these problems also on my Samsung Galaxy S III GT-I9300 running Android 4.3 and on .
What am I doing wrong? What Can I do to escape these issues? How can I make results of my experiments stable and safe?
Which apps on which platforms are stable and safe?