The Agromithra is a solar-powered multitasking agricultural robot designed to perform multiple farming operations under user control. The robot is controlled by the user through an Android mobile application using Bluetooth communication, providing ease of operation and flexibility in agricultural fields. The system uses a solar panel to generate electrical energy, which is stored in a rechargeable battery through a charging circuit. This stored battery power is used to operate the entire robot, including movement, agricultural tools, control electronics, and communication modules. An automatic solar tracking system using two LDR sensors and a servo motor continuously adjusts the solar panel position to capture maximum sunlight, thereby improving battery charging efficiency. An Arduino Nano microcontroller acts as the main control unit, receiving commands from the Android mobile via an HC-05 Bluetooth module. Based on user commands, the robot performs agricultural tasks such as ploughing, seeding, weed cutting, and water spraying using DC motors and relay-based control. The robot’s movement is controlled by DC motors driven through an L293D motor driver. The proposed system reduces human effort, improves productivity, and promotes the use of renewable energy, making it a practical and eco-friendly solution for smart agriculture.    

The main objectives of the project are:

1. To design and develop a solar-powered agricultural robot capable of performing multiple farming operations.
2. To store solar energy in a rechargeable battery and utilize the stored energy to power the robot and its subsystems.
3. To implement an automatic solar tracking system using LDR sensors and a servo motor for maximum solar energy harvesting.
4. To enable wireless control of the robot using an Android mobile application via Bluetooth (HC-05).
5. To perform essential agricultural tasks such as ploughing, seed sowing, weed cutting, and water spraying using DC motors and relay-based control.
6. To control robot movement efficiently using DC motors driven by an L293D motor driver.
7. To reduce manual labor and time consumption in agricultural activities.
8. To promote the use of renewable energy and eco-friendly technology in modern agriculture.

    The major building blocks of this project are:

• Arduino NANO Microcontroller.
• Solar panel.
• Charging circuit.
• Rechargeable Battery.
• DC Motors Along with L298 Driver.
• HC-05 Bluetooth.
• Seed sowing.
• Water motor.
• Weed cutter.
• Plough.
• DC motors.
• Relays.
• Servo motor.
• LDRs.

  Software’s used:  

1. Embedded C programming.
2. Arduino IDE for dumping code into Micro controller.
3. Express SCH for Circuit design.
4. Bluetooth application.

   

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