Valid Symphony
Conduct your life.
Touchless home control. Raise your hand into a small control zone and your lights follow it. A 60 GHz radar reads the position of your hand, and the hub drives the lights over your home network, with no camera, microphone, account, or cloud service involved.
How it works
Walking through the room changes nothing. Only a deliberate gesture does.
Zone
The radar watches a small, invisible control zone in front of it.
Grab
Holding a hand still in the zone for half a second takes control, and the light dips briefly to confirm.
Adjust
Raising or lowering the hand moves the brightness smoothly.
Release
Pulling the hand away leaves the light where you set it.
Design principles
Local only
The sensor talks to a hub in your home, and the hub talks to your lights. Nothing leaves the home network.
Nothing recorded
Hand positions exist in memory for a fraction of a second. The hub keeps no logs or history on disk.
Radar, never images
The sensor measures distance and motion. It cannot capture a picture or a sound.
Your existing lights
LIFX first, then Zigbee lights through Zigbee2MQTT, then Home Assistant.
Controlled supply chain
Dependencies are copied into the repository and audited on every commit, and release builds run offline on a pinned toolchain.
Built in the USA
Designed around a Texas Instruments radar from Dallas, with hardware planned for assembly in the USA.
Architecture
symphony-core handles hand tracking, the grab and release logic, smoothing, and output pacing. It is written once in Rust to run on the hub today and on the radar chip itself later.
symphony-hub reads the radar over USB, runs the core, and drives the lights through interchangeable backends.
Prototype hardware
| TI IWRL6432AOPEVM | 60 GHz radar evaluation board streaming 3D points over USB |
| Hub computer | Runs the hub software on Windows, with Linux to follow |
| LIFX bulbs | The first light backend, controlled on the local network |
Progress
The radar board is running and the hub tracks a moving hand live. Hand control is being tuned on the board now.
Complete
- Repository, Rust workspace with no external dependencies, and a continuous security audit
- Radar running, with a moving hand visible in TI's visualizer
- Hub configures the radar and reads its frames without errors
Next
- A live control value that follows the hand and ignores movement behind the zone
- Grab, raise, lower, and release dimming a LIFX bulb
- Reliable grabs with a light response within about 100 ms
- Left and right movement setting color temperature
After the prototype
- A custom board around TI's IWRL6432 with a certified Zigbee and Thread radio
- Tester units in real homes and pre-compliance radio testing
- FCC certification and a first production run