"alaprecorderHD" lap timer app
 

While researching on what is available with the latest lap timers, I ran across this
http://adyno.net/ alaprecorderHD

This Android app looks very good if it delivers as shown. External bluetooth GPS compatible (5 or 10 Hz), ODBII logging, HD video recording, accelerometer data (not computed, actual accelerometer data), lap time display, splits, etc. etc.

More info:
Record/replay in car video/GPS/G-Force and OBD2 data.
Supports up to 1080p HD video recording.*
Support for external 5/10hz performance DGPS receivers (Differential GPS).
Support for OBDII ELM 327 Bluetooth interface to vehicle ECU.
Record speed, location, altitude, acceleration, braking, engine rpm, throttle position and more…
Display GPS location and track overlays during playback.
Add Google map overlays and picture in picture views.
Touch screen controls to quickly seek through video and data replay.
Review, save or send lap comparison charts and reports.
Load track lap and sector details from world track library.
Mark up to 30 user sectors/checkpoints for detailed lap min/max speed and split time reports.

It looks to be a very recently developed app. Anyone here try it out yet?

Good thing I got that G2X a few months ago. :cry:

I wonder if it can record in 3d and upload to cloud on the fly? I loaded it and I'll shoot video/data on my way to work tomorrow.

This looks like exactly the logger I've been looking for if it works. In for the results.

Let me know if it works, and what ODBII bluetooth adapter you are using.

I am downloading it now. I will play with it some this afternoon. I really need to get a mount for my camera for my car. This way I can actually try out the app.

Now if only we could hook it to ms3 instead of an obd2 port.

I ordered one of the PLX Devices Kiwi Bluetooth OBDII Scanners, a name brand, since I want to try it with 'Torque' anyway. I want to try this at the next NASA TT event at TWS (only a week away).

Apparently most of the Chinese knockoff scanners, even though they work, have a hard time maintaining good data stream bandwidth for performance measurements. Dropouts, lost connections, etc. So I spent the extra money and bought the name brand. The last thing I need on race day is a bunch of electronics frustration.

What car are you going to use it in?

I ran it with the internal GPS and it's pretty cool. I'll definitely use it for video at the track, use the G2X for real data though since it has a 10hz gps already a significantly more features for review.

im going to get one of these for those trackdays when there isn't an amb avail.
i'll have the beacon if someone wants to just buy the receiver/display unit, and i'll loan it out also. crazy cheap.

http://slipangleracing.com/

How are you guys mounting the phone in the car during track events to record the video. Are you fabricating a mount, if so can you post some pics of it if not what are you using

Thanks

this is what i use: http://www.igrip.us/1666
with this holder: http://www.igrip.us/1246

and zx, i didn't know hustler had an obdII car? did he swap out everything to that?

I'm going to use this in my LS1 Miata track car. The LS1 uses an ODBII ECU so it will work with the bluetooth adapter. That will let me log throttle position, engine temperature, indicated speed, and other ODBII data. And, it will be synched with the GPS, accelerometer, and video data since they are all being recorded into the same log.

I figured he had manned up by now and put a LS1 in his car :giggle:
Duh on my part.

I'm pretty sure the answer to this is no, but does the OBDII ECU have any braking-related data available for logging? If not, how do people typically log this? Do you have to wire in your own sensor?

Other than the longitudinal g-meter (indirect measurement) there is no way to measure brake pressure since there is no brake pressure transducer I am aware of. Maybe it would provide an on-off from the brake switch. Or maybe an ABS trigger is another possible one?

So after using it this last weekend I am not giving it a strong recommendation, just a maybe. Here is why...

1. It is pretty buggy, at least on my HTC EVO 4G Android phone. Examples of problems are:
a. Unable to reload some of the sessions to view the video/data overlay. After multiple attempts to load my last two sessions, I had to delete the ODBII data file associated with that session (did it from a PC). Then it would load and play back.
b. I was unable to export a CSV file, formatted for use with racechrono AVI for example. The phone would stop converting about 1/4 of the way through and then just lock up. I finally had to reboot the phone to unfreeze it.
c. The video overlay export options it offers are not tailorable. The pre-formatted ones did not have the data I wanted.

2. It did record the g-load data, and based on a friction circle plot, and watching the video/playback, the values and timing are reasonable. So that is a definite plus, since as far as I am aware, Trackmaster does not record g-load data from both channels.

3. The user interface had inconsistent behavior. A couple of times it left me wondering WTF while I was sitting on the grid trying to start the datalogger. Once I abandoned it since I could not get it started before being sent out on track.

If the developer gets all of the bugs out, and it works consistently, then this app will be very useful. Even without video export, the video/data overlay playback is handy for quick and dirty post-session analysis.

I cannot post any videos from the phone because it has been a real bitch to get the data off in a usable manner. I have video with no overlays, but it is not very interesting since the video quality is not great (due to the mount, not the software).

So, there it is. Personally I think I will go back to Trackmaster, hoping that it will get good g-load data logging. When it does, I think Trackmaster, and maybe Torque for ODBII logging, will be the ticket. The data will still need to be pieced together afterwards however.

This just in. Trackmaster now records video. Why did they have to release the new version THE DAY AFTER my race weekend?!

What do you mean when you say trackmaster does not record g-load data? I'm pretty sure i have longitudinal and lateral g traces in my data.. They don't look calculated.

In version 4 at least, the accelerometer was only used for lateral. Got this from the author. The friction circle plots do not look like what would be expected.