[ANDROID] Battery query during acceleration streaming causes timestamps to jump

[Klaus Förger]

Hi,

I would like to know the battery level during long acceleration recordings with subscribe on "Meas/Acc/52", but using GET on "/System/Energy" causes the sensor to return a wrong timestamp on one of the received acceleration packets.

To reproduce this, just subscribe to "Meas/Acc/52" and create a task repeating every 5 seconds with GET on "/System/Energy". This will produce similar jumps on the timestamps as in the attached plot with 5 second intervals. I was shaking the sensor steadily, so it seems that the four samples in the offending packet are valid data, but they just have approximately 100 millisecond offset in the timestamp.

I used Android mobile lib version 1.28.1 and firmware version 1.7.2. I tested with three different sensors attached one at a time to Samsung Galaxy S7, LG K8 (2017), and Nexus 5X phones, and the bug happens consistently on all the devices.

[Petri Lipponen]

There was a timestamp bug in 1.7. Does this still reproduce with sensor firmware 1.9.x?

[Petri Lipponen]

Closing and assuming fixed.