Download the app
The dashboard is the starting point for setup, control and observation.
A project for living systems
More than a grow controller.
GrowBro connects climate, technology and plant life in one system that reveals relationships and makes change over time understandable.
01 / 09
Local control. One app. An evolving picture of the plant.
GB / 001CONTROL · OBSERVE · UNDERSTAND
01 / THE IDEA
From a reading to the plant's story.
Temperature, VPD and light levels tell only part of the story. What matters is what happened next: What stage was the plant in? What did the system change? How did the plant respond?
GrowBro brings sensors, actuators, planning, care events, images and history together in one place. Step by step, a controller becomes a plant operating system.
See the systemPlant stateEnvironmentActionResponse
02 / ONE STARTING POINT
One app. From the first idea to a running grow.
Getting started does not begin with a finished controller. GrowBro guides the build.
Choose hardware
Choose defined integrations with standard hardware available around the world.
Flash the ESP32
Install firmware directly from the app and follow the guided first setup.
Build & connect
Configuration, GPIO and wiring plans, and printable guides help with the physical build.
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GrowBro travels as software, intelligence and specifications — not in a box.
Hardware remains open and replaceable; checked assignments and integrations make it a dependable system.
03 / WIRING PLAN
From a pin to a clear connection.
The visual GPIO guide turns a pin list into a plan you can follow.
See components and pins
Sensors, lighting, exhaust, circulation, power and ESP32 connections appear in a zoomable overview. Detail views show their individual routes.
Draft or device state?
The export identifies whether pin and pull assignments are a draft or a device readback. A reference parts list and notes complete the plan.
Export, print, share
Create the full plan with the selected view or every detail as a printable PDF or standalone offline HTML file; save it or send it through the share menu.
The wiring plan is a documented reference. Check the actual wiring and any open module connections on the physical build.
04 / ARCHITECTURE
Strong locally. Open to more.
The ESP32 controls the grow independently. The dashboard and Virtual Hub extend visibility and capabilities.
Grow Controller
Read sensors, control lighting and climate, regulate actuators: the core logic runs locally on the ESP32, even when the app or hub is off.
ESP32SensorsActuators
Dashboard
Live readings, history, devices, plant planning and controls share one interface on desktop and Android.
LiveHistoryPlanner
Virtual Hub
Adds multiple devices, long-term history, remote access, camera, media, timelapse and vision services. Local control remains independent.
RemoteMediaVision
05 / THE PROJECT IN PICTURES
The idea takes shape.
Concept visuals from our project folder show how the components work together. Real interface screenshots follow in the next section.
Local controller, dashboard and optional Virtual Hub in one picture.
Firmware and guided initial setup are part of getting started with GrowBro.
Metric and imperial units plus time displays for different places.
The desktop version brings the dashboard, setup and wiring plan together.
Concept visuals · Text within the graphics remains in German for now.
06 / SYSTEM VIEWS
One ecosystem, many perspectives.
Real views of the running GrowBro interface. The current screenshots were taken on 31 October 2026.
Controller, sensor hub and actuators show their state together.
Readings over time instead of isolated numbers.
Lighting, schedules and climate work together.
Live view, archive and timelapse add context to the data.
VPD readings appear alongside target zones for each plant stage.
Profiles, care events, tasks and photos stay linked to the plant.
Mode, output and air volume in one view.
Up to three fan channels with status and operating mode.
Sensor sources, live values and actuator history in one place.
System and sensor messages add context to the measurement curves.
The weather view adds context about local conditions.
An experimental assistant area within the interface.
07 / WHAT COMES NEXT
Data becomes understanding.
GrowBro AI is the next layer of relationships: plant state, environment, actions and responses should become readable together. The goal is to understand change in context, beyond showing values alone.
IN DEVELOPMENT · NO AUTONOMOUS GROW CONTROL08 / DOWNLOADS
Open download folder Download GrowBro.
The dashboard, weather app, Windows package and guides are in the shared Google Drive folder. Firmware files are included in the compiled releases.
09 / ABOUT GROWBRO
The project at a glance.
GrowBro / Living Grow Controllers is a local grow-control platform for desktop and Android.
GrowBro connects the ESP32-S3 Growmaster, the dashboard and the Virtual Hub. Control runs locally on the device; the interface shows readings, settings and confirmed state.
Measure & control
Sensor mix, climate, lighting, exhaust and up to three circulation fans.
Observe & plan
Live data, history, grow overview and Plant Planner.
Connect devices
Multiple Growmasters in the Virtual Hub; camera, timelapse and vision with suitable hardware and runtime components.
OUR PRINCIPLE
A change counts as complete only when fresh device data confirms it.
Project status
A private, noncommercial development project by Dominik Rosenthal.
- Dashboard
- v1.1.196
- ESP firmware
- v2.9.15-heater-off
- Virtual Hub
- v0.1.32
A system that grows with the plant.
From the first connection to long-term observation: open hardware choices, clear integrations and a close view of what actually happens in the grow.
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