Watering-Plant-Bot

Watering PlantBot with ROS2 and Arduino

A simple plant-watering system that uses ROS 2 (Python) and Arduino UNO via serial communication. The system reads soil moisture and activates a servo motor to water the plant if the soil is dry.

---

Components Used

Component	Quantity
Arduino UNO	1
Soil Moisture Sensor	1
Servo Motor (SG90/MG90)	1
Jumper Wires	As needed

Connections

Soil Moisture Sensor (Analog type)

• VCC → 5V (Arduino)
• GND → GND (Arduino)
• AO → A0 (Arduino)

Servo Motor

• Signal → Arduino digital pin 9
• VCC → 5V
• GND → GND

Arduino Code (plant_bot_arduino.ino)

Listens over serial for:

• R → Reads and returns soil moisture
• W → Activates servo to water plant

ROS 2 Python Node (plant_bot_ros.py)

• Sends 'R' to Arduino every 5 seconds
• Reads the moisture value
• If value > 800, sends 'W' to water the plant

Files in This Repository

plantbot/
├── plant_bot_ros        
├── plant_bot_Arduino    
├── video                
└── README.md              

How to run

1. Upload Arduino Code

• Open arduino_node.ino in Arduino IDE.
• Select your board and COM port.
• Upload the code.

2. Connect via USB

• Plug Arduino into PC (usually /dev/ttyUSB0 or COMx).

3. Run ROS 2 Node

source /opt/ros/<distro>/setup.bash
ros2 run plant_bot plant_bot_node