Innovative Smart Water Serving Robot DIY using Arduino

The Innovative Smart Water Serving Robot is driven by an Arduino Uno microcontroller that coordinates wireless communication, motor control, and power distribution. At the core of the system is the Bluetooth HC-05 module, which pairs with an Android mobile application running on a smartphone or tablet. When a user presses directional commands on the app interface, serial data is transmitted wirelessly to the HC-05. The Arduino Uno receives these incoming serial signals, decodes the command instructions, and translates them into logical control outputs. To propel the robot chassis, the Arduino interfaces with an L298 motor driver. Because the microcontroller's digital pins cannot supply the high current required by the hardware, the L298 acts as an intermediate power amplifier. It draws energy from a multi-cell 18650 3.7V battery pack housed in a secure battery holder, supplying regulated voltage and current to the dual 12V, 500-RPM geared DC motors. By modulating the states of the motor driver inputs, the system enables differential steering, allowing the four 100cm diameter tyres to move forward, reverse, turn, and stop dynamically. Temporary connections and signal routing during prototyping are managed using a breadboard and jumper wires affixed to a custom wooden chassis. Through this integrated loop of wireless input, embedded processing, and robust power switching, the robot responds seamlessly to remote user navigation for automated delivery tasks.