Digital Stealth Care · grow room controller
Watches. Decides. Acts.
Add a brain to the gear you already have, and to all the gear you will get in the future. It keeps your grow room in range while you sleep. No cloud account. No subscription. No app that stops when someone else's server does.
Running on our test kit: 9.10.0 · kit firmware 9.0.0.0 · last report 22 Oct 2026
Replay03:07 · all in range · humidity 48 %
Every alpha build is free, this one included, and yours to keep. No account, no subscription, no licence check. Keep the image and you keep the software.
- WatchesEvery tent, pot and jar.
- DecidesAir first: fans before appliances.
- ActsOn the fans and plugs you already own.
Start small
Start small. Grow into it.
Start with the Pi. Add sensors, then the hub, when you want them. Nothing is thrown away when you move up.
Keep the fans, lamps and plugs you own. DSC switches them on a schedule and from your sensors, with the hub as the failsafe.
Step 1
A Raspberry Pi and smart plugs
All you need to start is a Raspberry Pi 4 with 4 GB or more (Pi 5 has not been tested yet). Smart plugs switch your fans, lamps, heater and humidifier on a schedule and from your sensors.
Step 2
Add sensors you choose
Bluetooth, Zigbee or Wi-Fi sensors from any maker. Now the room follows real readings, not just a timer.
Step 3
Add the DSC hub when you want it
The hub is optional. It adds wired fan speed, lamp dimming and a hardware failsafe that keeps the room in range if the Pi stops. Nothing you set up is thrown away.
With plugs alone, nothing takes over if the Pi stops. Don't leave a heater unattended on plugs alone; the hub adds that failsafe.
What DSC is
- Small to start. Begin with a Pi and a few plugs. Nothing you set up is thrown away when you add more.
- Yours. It runs on your Pi, in your room. No account, no licence check and no off switch on our side, so we can't take it away. Updates install only when you press Update. Your data stays on the Pi.
- Ready to grow with you. Add more tents, rooms and devices whenever you want. Tents and rooms are unlimited. Use any brand KitLib lists. The hub gives you fan speed, dimming and a hardware failsafe.
What DSC is not
- Not a kit you have to buy. Start with a Pi and the plugs and sensors you already own.
- Not a soldering project to get started. The DIY hub is optional.
- Not locked to one brand. Zigbee, Tuya/Wi-Fi and Bluetooth gear from any maker, listed in KitLib.
- Not a cloud service. It runs on the Pi in your room and keeps working with the internet off. Setup needs internet once, to build device firmware.
- Not a subscription. Every alpha build is free, and yours to keep. Release pricing for later versions has not been decided.
- Not Home Assistant. It is its own controller, made for grow rooms.
- Not a black box. Every number says whether it was measured, modelled or is unknown.
175
features live today, of 182 listed
3,113
verified products in DSC-KitLib 0.11.0
58
device classes, lights to leak valves
Running on our test kit: 9.10.0 · kit firmware 9.0.0.0 · last report 22 Oct 2026
firmware running now on the reference kit
Integrations
Works with the kit you already have
Fans, lights, plugs and sensors from hundreds of makers are catalogued in DSC-KitLib 0.11.0, the verified equipment library the brain ships with. Pair a Zigbee, Tuya or Bluetooth device and DSC recognises it and fills in the nameplate.
AC Infinity
Spider Farmer
Mars Hydro
VIVOSUN
SONOFF
Aqara
Shelly
Inkbird
Bluelab
Fluence
SANlight
Philips
Quest
Medic Grow
TP-Link
Bosch
Legrand
Moes
Names and logos are trademarks of their owners and appear only to identify gear that DSC-KitLib catalogues or that DSC recognises when paired. No endorsement is implied either way.
CannaLib · the strain catalogue
It knows your strain, too
143,611 strains on file. 7.36 million data points, each credited to its source. We have not found a deeper strain record anywhere.
Pick a strain and the kit reads its flowering time from CannaLib, then works out the plant's stage and harvest window. Only what you confirmed is used, and the kit says which source gave each number.
Strain profiles you have already looked up stay on the kit and keep working offline; a small built-in set of curated profiles is always available; the full catalogue is looked up online. A local copy of the catalogue can be installed on the kit for fully offline use.
The catalogue DSC draws on · served by api.cannalib.org on 2026-09-30
143,611
strains
118,039
family-tree links
7,358,743
evidence-backed data points
1,194
sources
3:07 AM
A night in the room, replayed
Humidity spiked at 2:04. You slept through the whole thing.
The exhaust went up first. When the air alone was not enough, the dehumidifier came on. By 2:19 the room was back in range, and your phone stayed dark.
What it does today
175 features live, running on our own rig.
All of it comes from the main branch, and all of it runs on our own rig: a 4×8 flower tent, a 2×4 clone tent and a curing chamber.
14 live of 15
Climate control
Air and leaf VPD, an 11-stage target rail for every growth stage, and a fan-first escalation ladder in the hub firmware. Check your own VPD in the free calculator.
11 live of 13
Root zone
A 7-in-1 probe per pot, runoff trays, and crop steering with a dryback chart instead of a guess.
11 live of 12
Lighting
One photoperiod for every tent, DLI and PPFD from the maker's own map, and schedule changes that wait for your approval.
19 live of 20
3D digital twin
A measured room with every fan, lamp, duct and probe placed by drag and drop, and replay of any moment.
15 live of 15
Cameras
USB, RTSP, MJPEG or snapshot sources. Frames stay on the kit and timelapses assemble themselves.
11 live of 12
Alerts and safety
Sensitivity presets, quiet hours that never silence the failsafe, and a rules engine that fails closed.
See it
The dashboard, screen by screen
Dark, dense and honest. Every number says whether it was measured, modelled or is simply unknown. Five items run along the top: Today, Spaces, Devices, Issues and Settings, with More beside them.
DSC Today: open issues and each tent's temperature, humidity and VPD against its band. Simulated room.
DSC Spaces: one card per space with its current climate against the want band. Simulated room.
DSC Settings: a rail of twelve sections with one section open. Simulated room.
DSC 3D twin: the room with parts bound to live entities and unbound parts marked. Simulated room.
Screens captured from a software simulation of a 9.9.0 kit (real brain, simulated room). Numbers are simulated; the layout is the product.
Why it is different
Locked to nothing. Built from anything.
01
Works when the internet is off
The brain, the dashboard and the equipment and nutrient libraries all run on the Pi in your room. No account, no subscription, and the room runs with the internet off. Strain lookups use the CannaLib catalogue online unless you install its local copy.
02
Steady when the brain stops
The hub keeps running its wired fans and dimmed lamps from its own sensors and its own clock, inside its hard limits. The clever part can reboot. The room stays in range. The DSC smart plugs switch themselves off if the brain goes quiet.
03
Yours to build and repair
Build guides for the hub and the pot probes, a schematics map of the power and signal lines, ESPHome firmware you flash yourself, and a parts list you can fill from a drawer. Your data stays yours.
Status
What runs today, and what is coming
Runs today
- LiveThe hub's own firmware keeps climate and lights, from its own sensors and its own clock.
- LiveThe brain runs the dashboard, plans, logs, the libraries, cameras, and the Zigbee, Tuya and Bluetooth devices.
- LiveThe four smart plugs switch themselves off if the brain goes quiet.
- LiveThe new screens since 9.8.9: Today, Spaces, Devices, Issues and Settings, with a site profile.
Coming
- In testingA planner that works out what it would do and records it. It controls nothing yet.
- In testingHand-over of control one device class at a time, each with a rollback. No class has been handed over yet.
- PlannedMaintenance and calibration reminders.
Founding testers
Help us help you.
DSC is in alpha, and it already runs on real plants. We check every build for safety and results before it goes wider. Founding testers shape the roadmap, and we will always be straight that it is alpha. The next alpha build goes to everyone who signs up.
We help you
Sign up and a download link lands in your inbox: dsc-hub-9.9.1-arm64.img.xz and its .sha256 file, for a Raspberry Pi 4 (4 GB or more; Pi 5 has not been tested yet). Raspberry Pi Imager and balenaEtcher read the .xz file directly; no need to unpack it. Every alpha build is free, this one included, and yours to keep. No account, no subscription, no licence check. Keep the image and you keep the software. No mailing list.
You help us
A name and an email are all we need. Everything else on the form is optional. Each answer tells us which rooms, gear and growers to build for next.