Open beta · Free to start
Plan your smart home — without the spreadsheet stress
Lighting, blinds, sockets, HVAC, and KNX group addresses in one friendly workspace. Whether you're wiring your first ESPHome project or quoting a 200-circuit house — we've got you.
- No credit card
- Free DIY package forever
- Built by installers
- 7 trades in one project
- Cloud sync included
- Live load & voltage drop
- Pro PDF & CSV exports
Why SmartWire
More than a lighting tool.
Your whole installation, in one place.
Most tools stop at one trade. SmartWire Studio covers the full smart home — KNX wiring, group addresses, DALI topology, load balancing, and client docs, all in a single project you can actually enjoy using.
Quoting a big KNX house with blinds on every window, sockets on every floor, presence sensors everywhere, and a full lighting plan? That's exactly what we built this for.
All trades covered
Built for you
Who uses SmartWire Studio?
Installers, DIY builders, and homeowners — one tool, three workflows.
The KNX Installer
Electricians & system integrators
You quote a 150-circuit KNX project, win it, then spend three evenings building group address lists in Excel. SmartWire Studio replaces that entirely. Define rooms once — every function gets its group address automatically. Hand your client a PDF that looks like it came from a €5000/day engineering firm.
- 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
The DIY Builder
ESPHome tinkerers & Shelly power users
You're building your own smart home with ESPHome, Shelly devices, WLED strips, and a Home Assistant instance you've spent more hours tuning than you'd like to admit. You need to know if your 200W power supply can handle all three strips in the living room, and whether the cable to the furthest strip is too thin.
- 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
Commissioning a smart home build
You've hired an integrator and signed off on a KNX system you don't fully understand yet. Your installer shares read-only access to the project — you can see exactly which switches control which rooms, where the roller blind actuators are, and what each circuit does. No logins, no spreadsheets.
- 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 scope of a KNX installation — not just the lights on the ceiling.
Lighting
LED circuits, DALI dimmer channels, switching actuators, scene presets. Full channel assignment, voltage drop per strip, cable injection point guidance. KNX group addresses for on/off, dimming, status, and scenes.
Sockets & Outlets
Track every switched socket circuit by room and zone. Assign KNX group addresses for switching and status feedback. Document load distribution across actuator channels.
Roller Blinds & Shading
Manage every blind and shading actuator across the building. KNX group addresses for up/down, stop, position, and slat angle. Track which actuator serves which room, floor, or façade orientation.
HVAC & Climate
Room-by-room thermostat functions: setpoint, actual temperature, operating mode, fan speed. Map every HVAC KNX object to its group address and actuator channel.
Presence & Motion
Document every presence detector, motion sensor, and brightness sensor by zone. Link sensor group addresses to their controlled functions. Track coverage gaps in your floor plan.
Scenes & Central Functions
Plan KNX scenes room by room, plus building-wide central functions: All-Off, Panic, Sleep, Away, and custom presets. Track which functions are preset vs. custom, with full GA assignment.
Security & Access
Document door/window sensors, alarm zones, and access control points. Assign KNX group addresses for alarm status, zone activation, and lock/unlock. Full integration with your central function plan.
DIY Controllers
Not running KNX? The free DIY package covers ESPHome nodes, Shelly devices, WLED controllers, and any custom 24V LED controller. Define channel capacities, voltage, and max current — then let the app verify your load.
Workflow
From project setup to wiring sheet in one session
Five steps — no spreadsheet exports, no duplicate data entry.
Set up your building structure
Add floors, zones, and rooms. Every circuit, actuator, and sensor you add later will be anchored to this hierarchy — giving you a clean, navigable project regardless of how many circuits you add.
Add controllers and power supplies
Register your KNX actuators, DALI gateways, or DIY controllers (ESPHome, Shelly). Add power supplies per zone. The app tracks channel count, max current, and utilization live — no more "does this PSU have headroom?" guesswork.
Plan every trade per room
For each room, add all KNX functions: lighting circuits, socket assignments, blind actuators, thermostat objects, presence sensor links, scenes. SmartWire Studio auto-assigns group addresses and flags anything missing a controller channel.
Check safety & load
Before you commit to a cable size, SmartWire Studio tells you the voltage drop on every LED run, whether each PSU is within its safe operating zone, and which channels are overloaded. Fix issues before the install — not during.
Export and hand over
Generate per-trade PDFs (lighting, sockets, shading, HVAC…) and per-controller wiring sheets with channel maps, cable tags, and injection point guidance. Switch to customer view to give your client a clean, readable version of their entire system.
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 basics
What is a KNX group address — and why do 200 of them become a management problem?
In a KNX installation, every function — a light dimmer, a blind motor, a thermostat setpoint — communicates via a group address (GA). A medium-size residential project easily has 300–600 group addresses across lighting, sockets, blinds, HVAC, and scenes.
Traditionally, these are managed in ETS or, more commonly, in Excel. Both work — until you rename a room, add a floor, or change actuator models three weeks into the project. Then every address shifts.
SmartWire Studio derives group addresses from your room hierarchy automatically. You define functions per room; the tool generates the addresses. Change the room — the addresses update. Every function always knows where it lives in the building.
How addresses are structured
Addresses follow a three-level hierarchy matching your building: Main Group / Sub Group / Function. For example: Floor 1 / Living Room / Dimming = 1/2/3. SmartWire Studio assigns and tracks these so nothing is ever re-used or orphaned.
Functions tracked per room
Packages
Open Beta Packages
Start free. If you need advanced features, upgrade to Home or Pro for free during the beta.
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?
Join the open beta — set up your first project in minutes.