OpenVR driver

The driver’s structure

<DriverDirectory> / 
├─bin / 
│	└─ ... 
├─resources / 
│	└─ ... 
└─driver.vrdrivermanifest

Installation

Copy the driver’s folder into any directory.
Launch <SteamDirectory>/steamapps/common/SteamVR/bin/win64/vrpathreg.exe adddriver "<DriverDirectory>"

Uninstall

You can uninstall the driver through the command line using the command:

<SteamDirectory>/steamapps/common/SteamVR/bin/win64/vrpathreg.exe removedriver "<DriverDirectory>"

How to use the driver

This driver adds support for the following device types in SteamVR:

tracker — Alt, connected to the Universal Radio Socket, Wired USB Socket, or Tag;
controller — the Bracer.

A tracker’s Placement is searched for by the name specified in the Tag property of the Socket. If the property is not set or such a placement is not found, the standard placement will be set using AntilatencyService.

A Bracer’s placement is set automatically depending on the Tag property of the socket. Therefore, you should set the Tag property as LeftHand for the left hand, and RightHand — for the right one.

Bracers buttons

Trigger click — push the sensor panel of the Bracer on the inner side of the palm.
System click — trigger click while holding your hand over your head and looking straight ahead.

System click works only after the tracking replacement procedure has been performed.

Standard SteamVR tracking override

The standard tracking override is carried out via the TrackingOverrides section in the <Steam directory>/config/steamvr.vrsettings file.

Example:

"steamvr" : {
    "activateMultipleDrivers" : true,
    "forceFadeOnBadTracking" : false
},
"TrackingOverrides" : {
    "/devices/antilatency/Head" : "/devices/lighthouse/LHR-979B50DB",
    "/devices/antilatency/LeftHand" : "/user/hand/left",
    "/devices/antilatency/RightHand" : "/user/hand/right"
},
"driver_antilatency" : {
    "enable" : true
},
"trackers" : {
    "/devices/antilatency/Head" : "TrackerRole_None",
    "/devices/antilatency/LeftHand" : "TrackerRole_None",
    "/devices/antilatency/RightHand" : "TrackerRole_None"
}

In this example, the driver creates a device with the serial number of Head. This device provides tracking for HMDs with the serial number LHR-979B50DB. You can also use aliases as we showed for hands in the example above.

The SteamVR system registers the device under the hardware serial number of the Socket. Instead of the serial number, the device can also be registered under the Tag property if it is set. You can find the serial numbers of devices in the Device Network tab in AntilatencyService.

Take into account that you should set the values of following parameters:

activateMultipleDrivers (steamvr section): true;
forceFadeOnBadTracking (steamvr section): false;
enable (driver_antilatency section): true.

We recommend setting the value in the trackers section to TrackerRole_None for each device, which overrides the tracking.

To protect settings from overwriting you should right click on the file steamvr.vrsettings, go to Properties tab and check the Read-only attribute checkbox:

To learn more about the SteamVR tracking override, please, read the SteamVR documentation.

How to find the serial number of an HMD

The serial numbers of all the devices in the SteamVR system are available in the System Report. You can create it with the Create system report command in the SteamVR menu: