WiFi Controlled Robot Arm using ESP32

A robot arm is one of the most versatile robotics projects. Building a 4-DOF (Degree of Freedom) arm with gripper, wrist, elbow, and base rotation controlled via WiFi demonstrates advanced robotics and IoT integration skills.

Why This Project Is Popular

Industrial automation is booming - robot arms are used in manufacturing, healthcare, and research. This project teaches kinematics, servo motor control, web server programming, and real-time control. It's impressive for portfolios and demonstrates professional-level skills.

Project Ideas or Guide

Build a fully functional robot arm:

• Mechanical Structure: 4 servo motors - base rotation, shoulder, elbow, wrist.
• Gripper: SG90 servo for opening/closing gripper jaws.
• ESP32 Web Server: Host a web page with sliders/buttons for each joint.
• Real-time Control: Use WebSocket for smooth, lag-free control.
• Inverse Kinematics: Advanced - move gripper to X,Y,Z position, calculate joint angles.
• Record & Replay: Record arm positions and replay sequence.

Components Used

• ESP32 Dev Board
• SG90 Micro Servo (4x)
• MG996R High Torque Servo (for base)
• Robot Arm Chassis Kit
• External Power Supply (5V 3A)
• Jumper Wires

FAQ

Q: How precise is the arm positioning?

A: With servo motors, about 1-2 degree precision is typical.

Q: Can I add camera for vision-guided grasping?

A: Yes, ESP32-CAM can add vision capabilities.