ESP32 Smart Plant Watering System
An ESP32-based automatic plant watering system that monitors soil moisture and controls water flow intelligently.
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₹3857.00
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Components
7 items
Difficulty
Intermediate
Build Time
2-3 hours
Project Details
How It Works
How It WorksThe system works by continuously monitoring soil moisture levels using a capacitive sensor connected to the ESP32's analog input. When the moisture reading exceeds a set threshold (indicating dry soil), the ESP32 sends a LOW signal to the relay module, which activates the water pump. Water flows until the moisture level drops below the threshold, at which point the ESP32 sends a HIGH signal to turn the pump off. This cycle repeats automatically, ensuring plants receive water only when needed.
Prerequisites
Basic understanding of electronics and microcontrollers. Familiarity with Arduino IDE and C++ programming. Knowledge of how to connect components on a breadboard. Understanding of analog and digital signals.
What You'll Learn
What You'll LearnLearn to read analog values from sensors like soil moisture sensors
Understand how to control high-power devices using relays
Master digital and analog GPIO pin configuration and usage
Implement conditional logic for automated systems
Gain foundational knowledge in IoT-based agricultural systems
Key Features
System automatically waters plants when soil moisture drops below threshold
Prevents overwatering by using precise moisture-based control
Can be scaled to monitor and water multiple plants with additional sensors and relays
Optional IoT features allow monitoring and control via mobile app or web dashboard
What's Included in the Kit
| Component | Qty | Price |
|---|---|---|
 | 1 | ₹1682.00 |
 | 1 | ₹199.00 |
 | 1 | ₹0.00 |
 | 1 | ₹36.00 |
 | 1 | ₹0.00 |
 | 1 | ₹171.00 |
Tubing & Water Container | 1 | ₹0.00 |
Operating Instructions
Pin Connections
Pin Connections| MCU Pin | Connected To | Purpose | Notes |
|---|---|---|---|
| GPIO 34 | Soil Moisture Sensor AOUT | Analog input for moisture reading | ESP32 reads analog voltage from sensor |
| 3.3V | Soil Moisture Sensor VCC | Power supply for sensor | Capacitive sensors typically run on 3.3V |
| GND | Soil Moisture Sensor GND | Common ground connection | - |
| GPIO 26 | Relay Module IN | Digital control signal for relay | LOW signal activates relay, HIGH deactivates |
| 5V | Relay Module VCC | Power supply for relay module | Relay module requires 5V |
| GND | Relay Module GND | Common ground connection | - |
Tools Required
Tools RequiredSafety Precautions
Electrical
- ⚠Never power the water pump directly from ESP32 pins
- ⚠Use relay isolation for pump control
- ⚠Ensure proper power supply for pump (separate from ESP32)
Handling
- ⚠Keep electronics dry and protected from water splashes
- ⚠Use waterproof enclosures for outdoor installations
Operating
- ⚠Check tubing connections to prevent leaks
- ⚠Ensure water container is stable and won't tip over
Frequently Asked Questions
Frequently Asked QuestionsQ:Can I water multiple plants?
Q:Capacitive or resistive sensor?
Q:Can I add weather-based logic?
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