Omni-Bot Pick and Place Robotic Arm: A Review

This project describes the design and implementation of a mobile robotic arm controlled through a wireless Bluetooth system. In this setup, an HC-05 Bluetooth module is connected to the Raspberry Pi to create communication between an Android mobile application and the robotic unit. The communication is carried out using UART serial protocol, which allows reliable transmission of control commands. The robotic arm is built with four degrees of freedom (4-DOF), enabling flexible movement such as base rotation, arm lifting, gripping, and object placement. The arm can rotate up to 270 degrees to cover a wider working area. Servo motors are used to achieve accurate positioning and smooth motion control. In addition to the arm mechanism, wheels are attached to the base so that the system can move from one location to another. In many small-scale industries, warehouses, and manufacturing units, pick-and-place work is still done manually. Workers have to lift, move, and place objects continuously, which increases physical effort and causes tiredness. In some cases, it can be unsafe, especially when the materials are heavy or hazardous .Most industrial robotic systems available in the market are costly and cannot be easily afforded by small industries or educational institutions. The proposed system aims to reduce human effort, improve productivity, and provide a practical automation solution at an affordable cost.