Four live measurements
Air temperature, humidity, soil moisture, and light are read every 2.5 seconds.
3RD PLACE · ROBOTICS THE DA VINCI CIRCUIT 2026
Aurora
Greenhouse
Smart Greenhouse v2 — a greenhouse that looks after its plant by itself. Designed by Chitraksh, with hands-on building, design input, and software contributions from Robin Singh, for The Da Vinci Circuit 2026.
Open-source firmware, apps, schematic, wiring card, and documentation.
- Controller
- ESP32-S3
- Sensors
- Temperature · RH · soil · light
- Actuators
- Servo pump · dual fans · grow light
- Apps
- Windows · Mac · Linux · Android
01 / SYSTEM
Sense, understand, and care for the plant.
Every 2.5 seconds the ESP32-S3 reads the greenhouse, calculates a health score from 0 to 100%, and decides whether the plant needs water, more airflow, or grow light.
ESP32-S3 care engine
The controller applies the selected plant profile and produces a clear 0–100% health score.
Water, air, and light
A servo-operated pump switch, two PWM fans, and an RGB grow light respond automatically.
Touchscreen + Bluetooth apps
Live data and controls stay available locally and on Windows, Mac, Linux, and Android.
Read every 2.5 s→Validate + score→Apply plant profile→Water + ventilate + light→Refresh touch + apps
02 / NINE PLANT PERSONALITIES
Nine plants, nine characters.
Each plant comes with its own growing ranges, watering style, and animated character. The character smiles when conditions are healthy, sweats in heat, shivers in cold, and droops when the plant needs help.
Tulsi
Individual temperature, humidity, soil, light, and watering behavior.
Coriander
Individual temperature, humidity, soil, light, and watering behavior.
Mint
Individual temperature, humidity, soil, light, and watering behavior.
Methi
Individual temperature, humidity, soil, light, and watering behavior.
Palak
Individual temperature, humidity, soil, light, and watering behavior.
Green chilli
Individual temperature, humidity, soil, light, and watering behavior.
Aloe vera
Individual temperature, humidity, soil, light, and watering behavior.
Money plant
Individual temperature, humidity, soil, light, and watering behavior.
Microgreens
Individual temperature, humidity, soil, light, and watering behavior.
03 / AUTONOMOUS CARE
Smart enough to act, careful enough to wait.
The controller combines the selected plant profile with repeated sensor readings. It does not react to a single noisy value, and every automatic action has a safety limit.
Confirm, pulse, soak
The soil must read dry three times in a row. Water is delivered in short pulses with soak time, a minimum gap, and a daily limit.
Two fans, gradual response
Intake and exhaust PWM fans increase smoothly as heat and humidity rise instead of jumping abruptly between off and full speed.
Light only when needed
An RGB LED strip switches on automatically when the light sensor detects that the greenhouse has become too dark.
- Watering starts only after three dry readings in a row.
- Short watering pulses are followed by soak time so moisture can spread through the soil.
- A minimum gap between pulses prevents rapid repeat watering.
- A daily watering limit protects the plant even when a reading stays dry.
- Each plant has its own preferred ranges, watering style, and animated health character.
- Manual controls keep the automatic safety limits in place.
04 / TOUCHSCREEN + APPS
Control it at the greenhouse or from almost any device.
The touchscreen gives direct access to live readings, manual controls, plant selection, and soil calibration. Bluetooth apps extend the same system to Windows, Mac, Linux, and Android.
BLUETOOTH · NO CLOUD
One greenhouse, four app platforms.
The apps connect directly over Bluetooth. They need no Wi-Fi, user account, online service, or subscription.
Live dashboardSee every sensor, actuator, care state, and plant health score as it changes.ControlsChange the plant, operating mode, watering, fan speed, and calibration settings.15-day historyReview plant health and sensor trends, watering events, and recorded conditions.CSV exportExport recorded greenhouse data for analysis, reports, or experiments.Demo modeExplore the full application even when the physical greenhouse is not connected.Private by designBluetooth only: no Wi-Fi, account, cloud service, or subscription is required.05 / HARDWARE
A practical solution to a real power problem.
The ESP32 cannot power the water pump directly. Instead of connecting the pump to the controller's power system, a servo physically presses the pump's own switch. The pump keeps its separate power supply while the greenhouse still controls watering automatically.
ESP32-S3
Reads the sensors, runs the care rules, drives the interface, and provides Bluetooth connectivity.
Environmental sensors
Measure air temperature, relative humidity, soil moisture, and ambient light every 2.5 seconds.
320 × 240 touchscreen
Shows live readings, plant health, manual controls, the plant picker, and soil calibration.
Two PWM fans
Separate intake and exhaust airflow that ramps smoothly with heat and humidity.
RGB LED grow light
Switches on automatically when the greenhouse becomes too dark.
Servo + pump switch
The servo physically presses the pump's own switch, keeping pump power separate from the electronics.
06 / UPDATED PROJECT GALLERY
Aurora Greenhouse v2, built and demonstrated.
The finished greenhouse, its touchscreen, internal grow environment, exhibition setup, and award display.
Everything needed to study, use, or rebuild it.
The new shared folder contains the firmware, applications, schematic, wiring card, detailed documentation, and supporting project files. It replaces every older download and repository link previously shown on this page.