Home SwiftUI Screen

The current room sits in a large centre disc with its temperature and humidity. Up to eight devices sit on a ring around it, each joined to the room by a soft bridge that pinches in the middle, so the hub reads as one piece rather than nine buttons. A device that is on is a solid block with its outlined glyph in the block's ink; one that is off is a pale surface disc with a hairline. Tap a disc to switch it, press and hold for its controls, and swipe the centre sideways to move to the next room while the ring re-deals from the middle with a short stagger.

Under the hub, the dock puts a keyboard and the cameras either side of a wide block capsule textured with a dot matrix. Tap the capsule and the dots ripple like a voice level while the transcript lands in a chip above it.

Notes

• Build [HubRoom] with up to eight HubDevices each and bind selection to the room id. The hub owns no data: onToggle and onHold hand you the device and you change your model.
• Devices keep their slot: the first sits at twelve o'clock and the rest follow clockwise, so a room with five devices leaves gaps instead of respacing when one is added.
• HubDevice.tint indexes the palette you pass in DeviceHubStyle, so the same device keeps its colour in every preset.
• The discs carry a quiet material inside their edge (a highlight up and to the left, a shade down and to the right, a hairline rim). Nothing glows outward; set material to 0 for flat discs.
• HubDock and HubDotMatrix are separate so you can put destinations, a voice button or anything else on the capsule. The matrix animates only while isListening is true and holds still under Reduce Motion.
• Every disc is a button with its name and state ("Pendant lights, On · 80%") and a Controls action. The centre is adjustable: swipe up or down to change rooms. Differentiate Without Color is covered by the fill, the rim and a glyph that changes with state where one exists.
• DeviceHubExample at the end of DeviceHub.swift is the screen shown in the preview, with loading and hub-offline states and a small command matcher behind the keyboard and voice. Replace run(_:) with your assistant.