Harry's GPS Suite Forum

Last night I started to setup HLT for landscape Video Camera mount (essentially plumb and straight center windshield landscape mode), and ran a custom calibration. Thereafter I tried Race/Timer mode which worked fine and gave correct acceleration readings.

Then I selected Realtime-->Acceleration. A portrait orientation screen was displayed and the system then forced a recalibration, essentially wiping out what I had done. Moreover, it displayed incorrect acceleration information (showing 1.0g left probably becuase it was displaying portrait mode but physically landscape mounted). Then when I backed out of Realtime mode, everything stayed portrait orientation until I restarted the HLT app itself.

I then switched (in settings) to video mode calibration preset thinking it was good enough. The data seemed fine, although Realtime -> Acceleration still has the portrait mode issue and displays 1.0g left (due to phone being physically mounted in landscape mode); although with calibration set manually to Video Cam mode, it does not force a recal.

Can anyone advise how to setup landscape mode, perform a calibration that is not overwritten by going into Realtime modes and does not lock up the orientation incorrectly. I am concerned that on race day, I will somehow lose the custom calibration or other fault in line with the above.

db

Don't use landscape for the Acceleration View. You can calibrate your device in portrait (using the Acceleration View) and lock the calibration afterwards. LapTimer actually takes two rotation matrices into account: one for the generate calibration and one for screen orientation. The former is locked meaning you can use a landscape view once it is fixed. The details are available in Acceleration Handling on www.gps-laptimer.de/documentation.

On locked rotation: LapTimer locks any rotation (except forced ones in case the respective view is portrait or landscape only) while driving. This is to work around flips when going through a corner fast (lateral > gravity). In general, rotation and other device handling should not be one while driving.

- Harry