What the Nexus does — and how it grows
There’s one hub now: the Nexus. It runs a single tent on its own, then scales when you do — clip on Mini, Mid or Max channel routers to reach up to 66 channels across as many as 16 rooms. Same hub, same dashboard, every step of the way.
Not sure how much you need? Take the 60-second quiz →One hub. For life.
Buy one Nexus today. Everything you might need someday — soil sensors, CO₂ enrichment, more channels, more rooms — clips on later without buying a new brain. Start with one tent, scale to sixteen rooms when ready. Never throw kit away.
| Capability | NexusOn its own | + Router Mini2-channel add-on | + Router Mid4-channel add-on | + Router Max8-channel add-on |
|---|---|---|---|---|
| Channels (fans, lights, valves, pumps) | 2 onboard | 4 | 6 | 10 |
| Channels with routers chained (up to 8 routers) | 2 | up to 18 | up to 34 | up to 66 |
| Rooms | 1 | Up to 16 | Up to 16 | Up to 16 |
| VPD climate automation | ||||
| Fan control (extract + intake) | ||||
| LED dimming | ||||
| PAR readings (canopy light intensity) | ||||
| DLI tracking (daily light dose) | ||||
| BudMaster PAR Wand (handheld, pairs over WiFi) | Upgrade | Upgrade | Upgrade | Upgrade |
| Stage presets (seedling / veg / flower) | ||||
| CO₂ injection (with dual safety) | per room | |||
| BudMaster WiFi smart plugs (humidifier / dehumidifier / heater / chiller) | ||||
| Soil sensor — 4-in-1 (temp / moisture / EC / pH) | per room | |||
| Soil sensor — 7-in-1 (4-in-1 + nitrogen / phosphorus / potassium) | Upgrade | Upgrade | Upgrade | Upgrade |
| Sensors supported (up to 30 m runs) | Up to 32 | Up to 32 | Up to 32 | Up to 32 |
| Wi-Fi | ||||
| Ethernet | ||||
| Local data storage | ||||
| Automatic firmware updates | ||||
| BudMaster Grow™ Mobile App | ||||
| Cloud account required | Never | Never | Never | Never |
| Subscription fees | None | None | None | None |
Nexus on its own Start here
The full brain — VPD climate control, CO₂, DLI light tracking, soil sensing and the dashboard, all built in. Its two onboard channels run a single tent on their own: an extract fan and a heater, or fan and dimmer. Everything else clips on later.
+ Router Mini First step up
Adds 2 more channels. The smallest jump — bring in a circulation fan and a humidifier when one tent grows into two jobs. The Nexus treats the extra channels as its own, same dashboard, nothing new to learn.
+ Router Mid Fully kitted room
Adds 4 channels. The sweet spot for a single dedicated room running everything at once — intake and extract fans, dimmable lights and climate plugs — all driven from the one hub.
+ Router Max Scale out
Adds 8 channels, and you can chain up to eight routers for 66 channels across as many as 16 rooms. Perpetual harvests, mother chambers, separate veg and flower rooms — one hub, one login, no duplication.
| NexusBudMaster | AC InfinityController 69 Pro | TrolMasterHydro-X Pro | PulsePulse Zero | |
|---|---|---|---|---|
| True VPD climate control (not just on/off) | Basic | Monitor only | ||
| Scales with channel routers | To 66 | Add-on modules | ||
| Built-in CO₂ dosing with hardware safety | Add-on | Add-on | ||
| Industrial soil sensing (EC / pH / nutrients) | ||||
| Works fully offline, on your network | App via cloud | App via cloud | Cloud-based | |
| Cloud account required | Never | Yes | Yes | Yes |
| Subscription for full features | None | None | None | Optional |
| Open API & Home Assistant | ||||
| Price | Coming soon | Live UK prices on the full head-to-head → | ||
A quick positioning view. For the fully-sourced kit lists and live 2026 UK prices, see the honest comparison.
True at every size
- No cloud account, no subscription, ever. Your data stays on the hub. The dashboard and the app talk to your Nexus directly.
- One hub, one dashboard, every channel. Add a router and the Nexus runs its channels as if they were its own — same control logic, same schedules. You learn it once.
- Automatic firmware updates, indefinitely. New sensors and new features land on your hub over your local network — no new box to buy to get them.
- Open where it counts. Open API, Home Assistant compatible, standard sensors and screw terminals that take any wire. Swap parts freely — no lock-in.
- Designed and assembled in Poole, Dorset. Built by a grower, for growers — if something breaks, you email someone who actually knows the box.
One hub. For life.
Start with the Nexus. Add channels as your grow needs them. Same dashboard, same firmware, same hub — for every step from a single tent to a sixteen-room operation.
Never throw kit away. Never start over. One hub — for life.
Not sure where to start?
Almost everyone starts with the Nexus on its own — it runs a single tent out of the box. Add a router the day you outgrow two channels. The 60-second quiz works out how many you’ll need.
Take the quiz →Weighing BudMaster against AC Infinity, TrolMaster, Pulse or Mars Hydro? See the full head-to-head →