Recent Posts

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OBDLink / Re: How are Pitch and Roll calculated?
« Last post by STN-Manny on Today at 03:39:11 pm »
In the OBDLink Android app, Pitch and Roll are device-sensor PIDs (i.e., computed from your phone/tablet sensors), not something read from the car and not something coming from the adapter.
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OBDLink / How are Pitch and Roll calculated?
« Last post by wz2b on February 22, 2026, 08:10:56 am »
Hi all,


I’m collecting some before/after data on body roll prior to doing suspension upgrades on my 2024 WRX. I noticed that OBDLink (Android) exposes software parameters for “Pitch” and “Roll,” and I’m trying to understand how those are calculated.

I’m trying to determine whether these values are stable enough for steady-state cornering analysis, or if I should log raw accel/gyro data and do the fusion myself.

At first glance it seems like you’d just use the phone’s gyros, but that wouldn’t be sufficient by itself since gyros drift over time. To estimate absolute pitch/roll correctly you typically need sensor fusion — combining accelerometer data (gravity vector) with gyro data (angular rate), possibly with some filtering (Kalman/complementary filter, etc.).

So I’m wondering:

Are the Pitch/Roll values computed by the OBDLink app itself?

Or are they coming directly from Android’s orientation APIs?

Is this purely phone-based sensor fusion, or is there any additional hardware involved?

Does OBDLink document how these angles are derived (e.g., filtered accel + gyro fusion, gravity vector estimation, etc.)?

I’m using a Pixel 10, so there’s no external IMU besides what’s in the phone. I assume the values are synthesized from the phone’s x/y/z accelerometer and gyro data, but I’d like to confirm before I base any analysis on them.

Any insight would be appreciated.
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OBDLink MX+ / Re: Lost activation For windows app
« Last post by Shawnf350 on February 21, 2026, 02:58:38 am »
I've sent you a message as well,
Kind regards,
Shawn
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OBDLink MX+ / Re: Lost activation For windows app
« Last post by SoulCarCustom on February 21, 2026, 02:34:59 am »
Quote from: Shawnf350 on February 10, 2026, 05:36:41 pm
Cart, I've sent you a message.

Shawn
Hi,
Could you help me with this? I got the same issue. I have an new laptop, re-install the software but it asks for an activation code that I didn't get anymore.
Thank you
5
General OBD Questions / Re: Programming 2012 for tow mirror
« Last post by Shawnf350 on February 16, 2026, 05:53:59 pm »
You can try AlfaObd.
https://www.alfaobd.com/

https://www.alfaobd.com/supported_cars.html

There are videos on you tube if your search too.
https://youtu.be/H2jwMda0v3Q?si=mkR2_BzT2HUbEqC_

I would personally purchase the ObdLink MX+.
Then you'll also be able to scan Ram vehicles and many other makes using the OBDLink app
 with free mfr specific add-ons.

The base tool is the OBDLink LX. If your not looking for extra features for the future.

Regards,
Shawn
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General OBD Questions / Programming 2012 for tow mirror
« Last post by ggumper54 on February 15, 2026, 11:48:59 am »
I am installing tow mirrors and my 2012 Ram 1500.  The new mirror have puddle lights and turn signals.  Which Scan Tool do I need to program this to work on my truck?  i have an Android phone to use with it.
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OBDLink MX+ / Re: bluetooth connection disconnecting
« Last post by Shawnf350 on February 15, 2026, 05:47:38 am »
From what your describing,  it sounds like the modem may be failing.
But, I would try a factory reset.
Hold the rest button 15-20 sec until power LED flashes rapidly then goes solid.

If that doesn't work,  you can also try going back to the previous firmware version by downloading and installing it from a PC.

Having a hard time linking directly, so. Go to the link in my screenshot if one below doesn't work.
https://www.scantool.net/downloads/updates/obdlink_mxp/

 I also suggest you put in a support ticket.
https://support.obdlink.com/support/tickets/new
 
Describe or link them to this thread Let them know when you purchased it (3 year warranty)

Kind regards,
Shawn
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OBDLink MX+ / bluetooth connection disconnecting
« Last post by mhixson on February 12, 2026, 11:27:10 pm »
Vehicle: 1996 AM General Hummer. GM 6.5TD.

Hi, I've been using an OBDLink MX+ for a couple years. I run it always connected to my 1996 Hummer. I have a Raspberry Pi that connects via Bluetooth and records data. This has been rock solid up until a few weeks ago. Every once in a while the reader just stops returning data and the blinkenlights stop flashing. Sometimes the connection between the Pi and MX+ will restore in a few seconds and sometimes it seems to be disrupted until I unplug/replug the MX+.

I had thought something was going wrong with my Pi, but this evening I saw the exact same behavior between the MX+ and my iPhone running the OBDLink app or DashCommand.

I do know there was a firmware update for the MX+ that I applied sometime around when I started noticing this happening, but I can't say 100% that the problem started right after the update.

Anyone else seeing this? Any known fix?
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General OBD Questions / Re: VW Tiguan R-Line 2021 Remote start not working
« Last post by STN-Manny on February 11, 2026, 03:25:26 pm »
Are you using a particular app to connect to your vehicle?

The OBDLink app does not have access to OEM data, which you more than likely will need.

We would recommend trying Carista, which should have OEM data for your vehicle.
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OBDLink MX+ / Re: Lost activation For windows app
« Last post by Shawnf350 on February 10, 2026, 05:36:41 pm »
Cart, I've sent you a message.

Shawn
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