Delayed HR

[cziter15]

Hello,



I am using Orux for all my cycling activities with Xperia X8 and Geonaute ANT+ HR sensor.

For real time tracking everything works well, I see my HR is raising instantly when climbing.



When I export gpx and upload it to Strava or any other service, there is a delay in HR.



Look at image, hope it explains everything:

http://i.imgur.com/TUdX3IY.png">



OruxMaps ver 5.5.22

Any ideas ?



Regards,

Chris

[6745th@web.de]

Seems so also cadence is affected.

I have a small (30m) mountain next to my home. Today I ride 4 times up and down. It looks as I did not turn the pedals uphill,  only downhill. Strange. Maybe because I set GPS interval to minimum 10m distance,  so there is not a fixed time interval? I will try to set a fixed time interval 2sec.



http://uploads.tapatalk-cdn.com/20160312/63be3798e78f1ff8ff57795c4ea6d595.jpg">



The way down I did not turn the pedals..

[cziter15]

Looks like app is logging points by using GPS time, not device time.

Then it is trying to match sensor data arrival time with GPS point time.



When your device time does not exactly match gps time, there will be delays in produced GPX file.



There is a FIX, which worked perfectly for me:

https://play.google.com/store/apps/details?id=net.sourcewalker.gpstime">https://play.google.com/store/apps/deta ... er.gpstime">https://play.google.com/store/apps/details?id=net.sourcewalker.gpstime



(had to sync device time with GPS time)

[orux]

Looks like app is logging points by using GPS time, not device time.

Then it is trying to match sensor data arrival time with GPS point time.



When your device time does not exactly match gps time, there will be delays in produced GPX file.



There is a FIX, which worked perfectly for me:

https://play.google.com/store/apps/details?id=net.sourcewalker.gpstime">https://play.google.com/store/apps/deta ... er.gpstime">https://play.google.com/store/apps/details?id=net.sourcewalker.gpstime



(had to sync device time with GPS time)

Hello;



yes, you are right.



The GPS position fixes are recorded using the GPS date stamp, meanwhile the other sensors use the phone clock.



If your phone is set to use 'automatic time', it is enough to get the correct time for both GPS and sensors.





orux

[6745th@web.de]

Yesterday I set the interval to a fixed time,  did not help.



Android Setting 'automatic time' was off, now I switched it on.

GPStime shows now only 0.x second diff. That should be the solution.