🏠 Introduction

Immersive Home is project to bring Smart Home and Mixed Reality technologies together for an intuitive and immersive experience. Demo Video

Setup Guide

Planned Features

• Fast and Intuitive control over IoT devices
• Live overview over your smart home
• Simple way for creating automations
• Comfortable way of consuming virtual media unobstructed
• Advanced automations based on position in room

Support the Project

💕 If you like to see the project grow to support more devices and interaction methods, consider supporting the project using these methods:

• Donate using PayPal or GitHub Sponsors
• Buying the app on Meta App Lab or itch.io
• Contributing to the project by creating issues or pull requests

Supported Devices

Smart Home Platforms

• Home Assistant

Mixed Reality Headsets

• Meta Quest 2 / Pro / 3

Connecting to your Home Assistant Instance

Go to the settings tab (the gear icon) and enter the url ws://hass.example.com:8123 of your Home Assistant instance. You can use the paste button on the keyboard in order to not have to manually type the url and token. In order to authenticate, you have to generate a long-lived access token in Home Assistant. To generate a HASS token, login into your dashboard, click on your name (bottom left), scroll down and create a long-lived access token.

Finally, click the connect button and you should be connected to your Home Assistant instance.

🛠 Development

In order to contribute to this project, you need the following to be setup before you can start working:

• Godot 4.1.3 installed

Fundamentals

Communication with the Smart Home Environment is done using the HomeApi global. Each environment is made up of devices and entities. A device is a collection of different entities and entities can represent many different things in a smart home. For example, the entity of name lights.smart_lamp_1 would control the kitchen lamps while state.smart_lamp_1_temp would show the current temperature of the lamp.

File Structure

.
├── addons             (All installed Godot Addons are saved here)
├── assets             (Files like logos or assets that are shared across scenes)
├── content/           (Main files of the project)
│   ├── entities       (Entities that can be placed into the room)
│   ├── functions      (Generic functions that can be used in scenes)
│   └── ui             (User Interface Scenes and related files)
└── lib/               (Code that is global or shared across scenes)
    ├── globals        (Globally running scripts)
    └── home_adapters  (Code allowing control smart home entities)

Home Api

The HomeApi global allows to communicate with different backends and offers a set of fundamental functions allowing communication with the Smart Home.

Device {
	"id": String,
	"name": String,
	"entities": Array[Entity]
}

Entity {
	"state": String
	"attributes": Dictionary
}

# Get a list of all devices
func get_devices() -> Signal[Array[Device]]

# Get a single device by id
func get_device(id: String) -> Signal[Device]

# Returns the current state of an entity.
func get_state(entity: String) -> Signal[Entity]

# Updates the state of the entity and returns the resulting state
func set_state(entity: String, state: String, attributes: Dictionary) -> Signal[Entity]

# Watches the state and each time it changes, calls the callback with the changed state, returns a function to stop watching the state
func watch_state(entity: String, callback: Callable[entity: Entity]) -> Callable

Interaction Events

Each time a button is pressed on the primary controller, a ray-cast is done to be able to interact with devices or the UI. Additionally, each event will bubble up until the root node is reached, allowing to handle events on parents. In case that an event of a specific node has to be reacted on, use the Clickable function node.

It is also possible to bubble up information by returning a dictionary from a function like _on_click.

Function called	Args	Description
_on_click	[event: EventPointer]	The back trigger button has been pressed and released
_on_press_down	[event: EventPointer]	The back trigger button has been pressed down
_on_press_move	[event: EventPointer]	The back trigger button has been moved while pressed down
_on_press_up	[event: EventPointer]	The back trigger button has been released
_on_grab_down	[event: EventPointer]	The side grab button been pressed down
_on_grab_move	[event: EventPointer]	The side grab button been pressed down
_on_grab_up	[event: EventPointer]	The side grab button been released
_on_ray_enter	[event: EventPointer]	The ray-cast enters the the collision body
_on_ray_leave	[event: EventPointer]	The ray-cast leaves the the collision body
_on_key_down	[event: EventKey]	The ray-cast leaves the the collision body
_on_key_up	[event: EventKey]	The ray-cast leaves the the collision body
_on_focus_in	[event: EventFocus]	The node is got focused
_on_focus_out	[event: EventFocus]	The node lost focus
_on_notify	[event: EventNotify]	The ui notification system

After considering using the build in godot event system, I've decided that it would be better to use a custom event system. The reason being that we would have to check each tick if the event matches the desired one which seems very inefficient compared to using signals like the browser does. Thus I've decided to use a custom event system that is similar to the one used in the browser.

UI Groups

Group	Description
entity	Marks the object as being an entity placed in space
ui_focus	The element can be focused, can be a parent
ui_focus_skip	Focus checking on this element will be skipped
ui_focus_stop	The focus will not be reset. Useful for keyboard

Saving and Loading

In order for an entity to be saved, it has to implement the _save function returning a dictionary of the data that should be saved. When loading, first the saved node gets instantiated, then either the _load function is called with the saved data, or when no _load function is implemented, the saved data directly applied to the node.

Functions

In order to implement generic features, a set of functions is available to be used in the project.

Movable

The Movable node allows to move a node around in the room. It uses the grab events in order to transform the parent node.

Clickable

The Clickable allows to access events of the parent using signals this node emits.

Installing Locally

1. Make sure Git LFS is installed
2. Run git clone https://github.com/Nitwel/Immersive-Home.git in your terminal
3. Import the created Immersive-Home folder in Godot
4. Open the project in Godot 4.1.3

Testing without a VR Headset

In order to test without a headset, press the run project (F5) button in Godot and ignore the prompt that OpenXR failed to start. To simulate the headset and controller movement, we're using the XR Input Simulator asset. Click at the link to get a list of the supported controls.

Building

1. Possibly fix importing scenes error
2. Follow the following guide to setup exporting for android. link
3. Make sure to reuse any existing debug.keystore when updating an app
4. Don't forget to set the JAVA_HOME variable and restart Godot to take effect
5. Install the Godot XR Android OpenXR Loaders plugin in Godot
6. Configure the following in the android build template:
   • XRMode set to OpenXR
   • Check Use Grandle Build
   • Check Godot OpenXR Meta
   • In XRFeatures, select at least optional for passthrough
   • Ckeck Internet under the permissions
   • Under Resources > Filters to export, add *.j2
7. <uses-feature android:name="com.oculus.feature.CONTEXTUAL_BOUNDARYLESS_APP" android:required="true" /> can be added to the AndroidManifest.xml to disable the boundary system.

Troubleshooting

• If you encounter unexpected behavior when building compared to running locally, it may be that the cached data of godot is corrupted or outdated. Try deleting the .godot folder and / or all *.import files.