I recently bought a GoPro 7 Black (got tired of dealing with the iPhone 4S) and have changed up where I'm mounting things. My new set up is to have the GoPro over the shoulder pointing forward with the main view, and the iPhone 7 in the upper right corner of the windshield pointing straight at me. This gives me the advantage of having it out of my field of view, in reach for initializing and stopping sessions, good view of the sky for GPS, and I use the front camera to record side-cockpit view of me. See this for a combined example video: https://youtu.be/1zKGJGnxE_4
However, because I did not calibrate the acceleration for HLT on the phone, the g-force data was way off. My fault, not yours. So now I want to make sure I understand the process to do for this weekend at the track. I read your Acceleration Handling documentation. Is this procedure correct and exactly what I need to do to get accurate acceleration data in HLT? It wasn't clear to me from the documentation whether I need to do both Pitch Calibration and Gear Calibration. I haven't tried it yet, so when I do, it might be more clear.
1. Mount the phone in the appropriate position with the car stopped
2. Go to prepare race -> Calibration
3. Make sure it shows 0 / 0 / 1G (is there a chance this doesn't happen automatically?)
4. Advance to gear calibration, hard accelerate straight for a few seconds and then brake hard for a second or two
5. Lock Calibration
The very last paragraph in your PDF says:
How can the user tell if the individual calibration worked correctly? Thank you in advance.The weak point of individual calibration is it may fail. This happens in case LapTimer does not interpret the “standing still” or “driving straight decelerating” correctly. This in turn will derive a wrong rotation and odd data as a consequence. The good news is: it is probably not necessary to run this calibration again and again (including a failure from time to time).