Vive mocap for the Vive Tracker only (no HMD)

Setup and hack

• This only works on Windows
• The Linux port is on its way (in beta)
• Install Steam
• Install SteamVR
• In Steam: Library | Tools | SteamVR | right click | Install Game...
• Clone the OpenVR SDK
• From github here
• API doc here
• Change file default.vrsettings
• Located in C:\Program files (x86)\Steam\steamapps\common\SteamVR\ressources\settings
• Change line requirehmd : true for requirehmd : false
• More details on Luke Beno's blog (he is from Triad Semiconductor's)
• Opt-in beta for SteamVR (NOTE: à confirmer mais à priori on n'a plus besoin d'être en beta)
• From the SteamVR line in the Library tab
• Right click Properties | Betas | Select the beta... | beta - ...
• More details here
• If you use C++ you can start with example provided by Omnifinity on github

Compile

• Under Visual Studio
• Run in Release config
• You will need to indicate the example solution
• The path for the OpenVR headers
• The path for the OpenVR lib

Run

• Run Steam
• Run SteamVR
• SteamVR will indicate NOT READY in red, this is normal
• The Base Station LED should be green
• It is blue when something is wrong (e.g. when the base is not static)
• The Vive Tracker LED should be green
• It is blue when something is wrong or not ready
• SteamVR will show the Base Station icon in green as here
• SteamVR will show the Tracker icon in slowly flashing green as here
• Mouse over the Tracker icon, it should displaySteamVR's Vive Tracker green icon will display "tracking" when you mouse over it
• Copy a version of openvr_api.dll next to your executable
• Double click the compiled executable from the explorer
• Or alternatively run a command prompt and call the application from it

Troubleshoot 

• It often happens that we pair the system when actually willing to shut it down
• This is because pairing is a 2s press and shutting down is a 5s press
• So when release the press too fast it pairs the device with the dongle
• This pairing seems not to work correctly
• The led does not go green
• And SteamVR no longer recognize the Vive Tracker
• In order to re-pair the Vive Tracker correctly
• Start Steam
• Start SteamVR
• Plug the base station
• Manually pair the device (2s push on the device's button)
• Then in SteamVR: press button SteamVR beta triangle | Devices | Pair Controllers
• Everything should be fine after a few seconds

http://steamcommunity.com/app/358720/discussions/0/1470841715957441627/

https://steamcommunity.com/app/358720/discussions/0/133263024016740056/

https://steamcommunity.com/app/358720/discussions/0/133263024016787200/
http://steamcommunity.com/app/358720/discussions/0/361787186419244897/
https://www.solidearthvr.com/2017/05/12/tutorial-vive-tracker-basic-setup-in-unity/#device_numbering