Plan your smart home — without the spreadsheet stress
Lighting, blinds, sockets, HVAC, and KNX group addresses in one clean workspace. From DIY setups with ESPHome to full houses with KNX and DALI.
- Runs directly in your browser
- Free for DIY & 1 project
- ETS6 XML & CSV exports
- 7 trades in one project
- Cloud sync included
- Live load & voltage drop
- Pro PDF & CSV exports
Why SmartWire
More than just lighting.
Plan the whole installation in one project.
Most planning tools only handle lighting circuits. SmartWire Studio covers the entire installation: cable sizing, KNX group addresses, DALI topology, load calculations, and clean client documents.
A single-family home with blinds on every window, switched sockets, presence detectors, and a full DALI lighting plan? That is exactly what this tool is built for.
Calculated in the background
Cable sizing & voltage drop
Calculates voltage drop (dU) per LED run, verifies wire cross-sections, and checks PSU headroom before closing the wall.
All 7 trades in one plan
Lighting, sockets, blinds, and heating in one building hierarchy. Integrates DIY controllers, DALI, and KNX.
Clean group addresses for ETS6
Generates structured 3-level group addresses without collisions or gaps, ready to link in ETS6.
Audience
Who is SmartWire Studio for?
Electricians, DIY planners, and homeowners.
The KNX Installer
Electricians & system integrators
You quote a 150-circuit KNX project, win the job, then spend three evenings typing group addresses into Excel. SmartWire Studio eliminates that. Define rooms and functions once — group addresses generate automatically. Export a clean, professional room book PDF for your client.
- All KNX trades in one project
- Auto-generated group addresses per function
- Per-controller wiring sheets, ready to print
- Customer PDF: room-by-room, jargon-free
- Load balancing across all PSU zones
DIY & Home Automation
ESPHome, Shelly & Home Assistant
Building your smart home with ESPHome, Shelly, or WLED and Home Assistant? Before ordering parts, you need to know: does the 200W PSU have enough headroom for three LED strips? And will voltage drop make the far end too dim?
- ESPHome, Shelly, WLED controller support
- Automatic wattage & current calculation
- Voltage drop per strip, per cable run
- PSU load & channel utilization overview
- Free forever — no invite code needed
The Homeowner
Reviewing a project installation
Having KNX installed by a professional? The read-only customer view shows which switch controls which light, where the actuators sit, and what each circuit does. Clear, transparent, and easy to read without ETS knowledge.
- Room-by-room circuit overview
- All trades: blinds, lights, sockets, HVAC
- Always live — updated by your installer
- No account required to view
All trades
Every trade. One project.
SmartWire Studio plans the full electrical installation — not just ceiling fixtures.
Lighting
LED runs, DALI channels, and switching actuators. Full channel mapping, voltage drop per run, injection guidance, and ready-to-use group addresses.
Sockets & Outlets
Switched and permanent socket circuits mapped by room and zone. Group addresses for switching and status feedback, balanced across actuator channels.
Roller Blinds & Shading
Blind and shutter actuators across the entire building. Group addresses for up/down, stop, position, and slat angles, organized by room, floor, and façade.
HVAC & Climate
Thermostat functions per room: setpoint, temperature, operating mode, and fan speeds. Direct mapping for every communication object.
Presence & Motion
Presence and motion detectors mapped by zone. Sensor group addresses link directly to lighting circuits and scenes.
Scenes & Central Functions
Room scenes and building-wide central functions: All-Off, Panic, Night, and Away with clear group address allocation.
Security & Access
Window contacts, smoke detectors, and access sensors. Group addresses for alarm status and security monitoring.
DIY Controllers
Not using KNX? The free DIY package supports ESPHome, Shelly, WLED, and custom 24V LED drivers. Enter channel capacities and current limits — the app verifies loads and cable losses.
Workflow
From building layout to wiring schedule in 5 steps
No spreadsheet chaos, no duplicate data entry.
Create building structure
Add floors, zones, and rooms. Every circuit, actuator, and sensor attaches directly to this hierarchy.
Add controllers and power supplies
Register KNX actuators, DALI gateways, or DIY controllers (ESPHome, Shelly). Track channel counts, max currents, and PSU loads in real time.
Plan trades per room
Add lighting circuits, socket assignments, blinds, thermostat objects, and presence detectors. SmartWire Studio assigns group addresses and flags unassigned channels.
Verify safety and loads
Check voltage drop (dU) on each LED run, verify wire gauges, and ensure no power supply or channel is overloaded before rough-in begins.
Export and hand over
Generate trade summaries, per-controller wiring sheets with terminal allocations, and clean documentation for clients and electricians.
Learn
Why cable sizing matters more than the PSU
SmartWire Studio calculates voltage drop live — here's what goes on under the hood.
A common mistake: you spec a perfectly sized 24V/200W power supply, run a 5-meter LED strip from it, and the far end of the strip glows noticeably dimmer than the near end. The PSU is fine. The cable is the problem.
Every cable has resistance. Current flowing through it "uses up" some voltage before reaching the load. This is called voltage drop (dU). For LED strips, a drop above 3% causes visible dimming at the far end — and above 5% it becomes a quality issue you can't fix after the wall is closed.
The formula SmartWire Studio uses
L — Cable length one-way (meters)I — Current load (Amperes)ρ — Copper: 0.0178 Ω·mm²/mA — Cable cross-section (mm²)Worked example
4m cable run, 2.5mm², 2A load on a 24V system:
Same current but 10m cable at 0.5mm²:
SmartWire Studio calculates this for every circuit as you type. It also tells you whether single-end, dual-end, or mid-point injection is required based on your strip's maximum rated drop.
Power injection
Feeding from both ends of the strip halves the effective cable length — which reduces voltage drop by ~75%. SmartWire Studio recommends this automatically when your run exceeds safe thresholds.
KNX in practice
Why KNX group addresses in Excel get messy fast
In a KNX installation, every function communicates via a group address (GA) — switching, dimming, feedback, scenes. A typical home project reaches 300 to 500 addresses quickly.
Managing these in Excel or manually in ETS breaks down whenever you rename a room or add a floor: address ranges shift and references break.
SmartWire Studio derives group addresses directly from your building structure. You define functions per room, and the app assigns clean address blocks. When you rename a room, addresses stay aligned.
How addresses are structured
Addresses follow a 3-level structure matching your building: Main Group / Middle Group / Sub Group. For example: Floor 1 / Living Room / Dimming = 1/2/3. SmartWire Studio allocates address blocks so nothing collides or goes missing.
Functions tracked per room
Plans
Plans & Packages
Start for free. Upgrade to Home or Professional during the preview period without charge.
DIY
Forever free. For DIY builders and ESPHome tinkerers who want to plan their LED setup correctly.
- 1 project
- Lighting circuits (LED strips, channels)
- ESPHome, Shelly & WLED controllers
- Power supply load calculation
- Voltage drop (dU) per circuit
- Overload & safety warnings
- Other trades (sockets, blinds, HVAC…)
Home
The Home package upgrade is free during the beta. It will also remain free for private individuals afterwards! All trades, KNX group address planning, and room hierarchy.
- Everything in DIY
- Sockets, Blinds & HVAC
- Scenes & central functions
- KNX Group Address planning
- Topology Diagnostics
- Global Cable Schedule (CSV)
- PDF & wiring sheet export
Professional
The Professional package. Turn your plan into professional documents — PDF exports, global CSVs, and DALI topology management.
- Unlimited projects
- Everything in Home
- PDF export (per trade category)
- Global Cable Schedule (CSV)
- Wiring sheets (per controller)
- Lighting Circuits Mass Edit
- DALI bus & gateway management
Compare packages
Feature comparison
See exactly what's included in each package.
| Feature | DIY | Home | Professional |
|---|---|---|---|
| 24V LED Planning | |||
| Projects | 1 | 1 | Unlimited |
| Project sharing & collaboration | |||
| ESPHome / Shelly / WLED controllers | |||
| Power supply load calculation | |||
| Voltage drop (dU) per circuit | |||
| Cloud sync | |||
| Trades & Room Hierarchy | |||
| Lighting trade | |||
| Floor / zone / room hierarchy | |||
| Sockets & outlets | |||
| Roller blinds & shading | |||
| HVAC & climate | |||
| Presence & motion sensors | |||
| Scenes & central functions | |||
| KNX & Professional Tools | |||
| KNX group address planning | |||
| DALI gateway management | |||
| PDF export (per trade) | |||
| Wiring sheets (per controller) | |||
| Customer view (read-only share) | |||
| Advanced Tools & Diagnostics | |||
| Lighting Circuits Mass Edit | |||
| KNX Topology Diagnostics & Warnings | |||
| Global Cable Schedule Export (CSV) | |||
Questions
Frequently asked
Straight answers before you sign up.
Is SmartWire Studio really free?
Yes. The DIY package is free forever — one project, full 24V LED planning, ESPHome/Shelly controllers, and cloud sync. Home and Professional packages are free upgrades during the open beta.
Do I need KNX experience to get started?
Not at all. Many users start with ESPHome or Shelly on the DIY package. KNX group address planning unlocks on the Home package when you're ready for a full installation.
Can I share plans with clients or electricians?
The Professional package includes read-only customer views, PDF exports per trade, wiring sheets per controller, and a global cable schedule CSV — everything you need to hand off a project.
Where is my project data stored?
Projects sync securely to the cloud so you can pick up on any device. We use technically necessary cookies for authentication — see our privacy policy for details.
Ready to ditch the spreadsheet?
Set up your first project directly in your browser.