By Philippe Lewicki / 12 Nov 2019

Controlling lights with the Hololens and Internet of Things

hololens | hololens hue | iot | blog | lab

After using the Hololens for a few weeks, it's become very clear that  this device is the missing link between human movement and the Internet  of Things. And the first way we're demonstrating this is by changing  the way we control Philips Hue lights.

Right now, you can use a smartphone app to control IoT-connected  lights in your room, which is really cool. Unfortunately, I never found  the concept of lighting apps to be very practical. Why do I need to pull  out my phone, launch the app, and find my lamp when I have a switch  right on my wall? Even Echo or Alexa's voice control doesn't beat the  physical switch in terms of usability.

The smartphone apps are also very limited; connected lights like the  Philips Hue have many more features than just on and off. They're  color-changing lights that have artistic and decorating value, letting  you create very cool, customized moods and ambiance.

Think about how color changes are used on a plane, for example. You  can see that the cabin lights change colors based on a flight's time and  status -- take off, cruising, and landing. It goes from pink to red,  blue, and white.

We stumbled onto the problems surrounding lighting control while we  were adding more options to our Hololens restaurant experience demo. Anthony is a big fan of the Hue lights from Philips, so I borrowed his personal  hub and light to get started on adding a mood factor to our restaurant  experience

We went on to add light control to our restaurant experience demo. It  worked well -- actually, better than expected. Suddenly, the Hue lights  and IoT made much more sense.

Iot light with AR user interface


A screenshot of the Hololens lighting control app in action. The blue dot follows the user's line of sight.

Wearing the Hololens, I would just look at the light and do a simple  gesture to turn it on and off or change the color. This finally beats  the switch on the wall -- it's better and faster.

We put the Hololens on people and showed them how to control the lights, and then we saw the lightbulb go off in their heads.

We decided to make it a fully usable app to publish on the store and  make it available open source for feedback and contribution.

Here it is in action:

How to use the app

To kick off the project, we published what we used to create the restaurant experience. It's now available on Github here.

It's a fully working Hololens app. I've added in it the version of  the HoloToolkit I'm currently using. We’ll move it out as the  HoloToolkit becomes more stable.

To get it working, load the project in Unity and set your project  player settings for the Hololens. In the project hierarchy, select the  Hue bridge gameobject and set your Hue Lights hub IP and Hue lights  developer username.

And it should just work.

We're actively working on this app. Here are the changes you should see in the coming days:

  • A new user interface to control the colors and light intensity.  
  • A solution to place the lamp in your room and save their position for each room.
  • Auto setup to grab the hub IP.
Philips Hue UX mockup in Tilt Brush

Let me know if you try it. We'll have more updates on the app soon.

Philippe Lewicki

Culver City

Immersed in augmented reality for the past 4 years, international technology speakers. Philippe is working at AfterNow creating the future of human and machines interactions.

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