Help a Newbie Out
Posted: Fri Jun 26, 2020 6:44 pm
Hello All, I've been using HLT on my iphone 6 along with an old original GoPro Hero HD for many years and that's worked fine. This year I decided I would up my game and I added a new GoPro Hero 8 and a Kiwi 3 OBD adapter. I used this setup at Laguna Seca this past weekend and my end results were not what I had expected. I've been searching the forums all day and I think I've found out why, but want to confirm here.
Here's my setup:
iphone 6 running ios 12.4.7 (latest available)
HLT Grand Prix Edition, v23.0.11 (latest available)
GoPro Hero 8 (latest available firmware)
Kiwi3 OBD (latest available firmware)
I set HLT to use only the GoPro 8 camera (no phone camera being used), and HLT did automatically start and stop GoPro recording for me. I setup everything before heading on track and never had any errors or warnings reported.
My findings that I didn't expect:
1.) External Video and Data out of Sync:
HLT is recording the data and controlling the start/stop on the GoPro; I expected the two (video & data) to be in sync or very close. When I overlaid the data onto video (I tried both Dashware and Race Render 3) I found the data lagged behind the video by 3.6s to 3.9s varying with each session recorded. Is this the normal expected result? If not, is it simply my iphone 6 is too old and sluggish now?
2.) Slow OBD Updates:
I didn't use the RPM or Throttle Position data on my videos because both were so slow. When watching them overlaid onto the video, they were slow to update compared to what was happening in real-time on the video. What would be the cause for the slow OBD RPM and Throttle data? Again, is this down to a slow iphone 6? I had no errors or warnings in HLT when making the recordings. I did read this morning that the data is captured at the same rate GPS is captured. Since I'm using my phone for GPS, is this the reason for the slow RPM gauge? I assume the solution is to get an external GPS sensor? Will the Bluetooth Dual XGPS 160 work in conjunction with the Kiwi3 OBD Bluetooth device at the same time on iOS? How have folks been securing the GPS sensor in their car? Mine is a street car, I don't want to tape or glue anything to the dash.
3.) Less OBD Info:
I was excited to see what OBD information could be overlaid onto the videos. It appears the only data captured that you would use for a video is RPM and Throttle Position. I expected to have Brake input as well and was disappointed to see it's only guestimating brake by using negative Gs. I've now read on the forum that Brake input is not a captured OBD parameter.
Thanks for any help/advice. I'd like to tweak my setup for the next track day.
Fred
Here's my setup:
iphone 6 running ios 12.4.7 (latest available)
HLT Grand Prix Edition, v23.0.11 (latest available)
GoPro Hero 8 (latest available firmware)
Kiwi3 OBD (latest available firmware)
I set HLT to use only the GoPro 8 camera (no phone camera being used), and HLT did automatically start and stop GoPro recording for me. I setup everything before heading on track and never had any errors or warnings reported.
My findings that I didn't expect:
1.) External Video and Data out of Sync:
HLT is recording the data and controlling the start/stop on the GoPro; I expected the two (video & data) to be in sync or very close. When I overlaid the data onto video (I tried both Dashware and Race Render 3) I found the data lagged behind the video by 3.6s to 3.9s varying with each session recorded. Is this the normal expected result? If not, is it simply my iphone 6 is too old and sluggish now?
2.) Slow OBD Updates:
I didn't use the RPM or Throttle Position data on my videos because both were so slow. When watching them overlaid onto the video, they were slow to update compared to what was happening in real-time on the video. What would be the cause for the slow OBD RPM and Throttle data? Again, is this down to a slow iphone 6? I had no errors or warnings in HLT when making the recordings. I did read this morning that the data is captured at the same rate GPS is captured. Since I'm using my phone for GPS, is this the reason for the slow RPM gauge? I assume the solution is to get an external GPS sensor? Will the Bluetooth Dual XGPS 160 work in conjunction with the Kiwi3 OBD Bluetooth device at the same time on iOS? How have folks been securing the GPS sensor in their car? Mine is a street car, I don't want to tape or glue anything to the dash.
3.) Less OBD Info:
I was excited to see what OBD information could be overlaid onto the videos. It appears the only data captured that you would use for a video is RPM and Throttle Position. I expected to have Brake input as well and was disappointed to see it's only guestimating brake by using negative Gs. I've now read on the forum that Brake input is not a captured OBD parameter.
Thanks for any help/advice. I'd like to tweak my setup for the next track day.
Fred