The Wi-Fi Controlled Talking Robot is an IoT-based robotic system that can be remotely controlled using a smartphone over Wi-Fi. It combines robotics, embedded systems, and wireless communication to create an interactive and assistive robot.
The robot can move in multiple directions and provide voice output using a Bluetooth speaker, making it useful for assistive, educational, and automation applications.
- To design a low-cost, user-friendly robot
- To enable remote control using Wi-Fi
- To integrate movement and voice interaction
- To demonstrate IoT-based robotics system
- 📱 Mobile app-based control (Wi-Fi)
- 🔄 Multi-directional movement (forward, backward, left, right)
- 🔊 Voice output using Bluetooth speaker
- ⚡ Adjustable speed control using PWM
- 🌐 Works without external router (Access Point mode)
- 🔋 Rechargeable battery-powered system
The system consists of:
- Microcontroller (NodeMCU ESP8266)
- Motor driver (L298N)
- DC motors with wheels
- Bluetooth audio module
- Power supply system
The NodeMCU acts as the central controller, receiving commands and controlling motors.
- NodeMCU ESP8266 (CP2102)
- L298N Motor Driver
- BO Gear Motors (4x)
- Wheels (4x)
- Bluetooth Module (SPBT-039A)
- Speaker (4Ω, 3W)
- 18650 Li-ion Batteries
- TP4056 Charging Module
- Connecting wires
- Chassis
- Arduino IDE
- ESP8266 Board Package
- Mobile App (Wi-Fi Controller)
- NodeMCU creates a Wi-Fi Access Point
- Mobile connects to robot network
- Commands are sent via HTTP requests
- NodeMCU processes commands
- Signals sent to L298N motor driver
- Motors move accordingly
- Audio is played via Bluetooth speaker
- Forward
- Backward
- Left Turn
- Right Turn
- Diagonal Movements
- Speed Control (0–9 levels)
- Uses Bluetooth speaker
- Mobile sends audio using TTS
- Robot "talks" using pre-recorded voice
- No voice recognition (output only)
- 18650 Li-ion batteries used
- TP4056 module for charging
- Provides stable and portable power
- Wi-Fi based control
- NodeMCU acts as web server
- Real-time command execution
- Low latency response
- Successfully tested in indoor environments
- Stable Wi-Fi connectivity
- Smooth directional control
- Reliable voice output
- Low-cost and efficient performance
- Assistive robot for elderly/disabled
- Educational robotics platform
- Home automation assistant
- Indoor delivery robot
- Interactive learning tool
- Low cost
- Easy to use
- Wireless control
- Modular design
- Real-time response
- No voice recognition
- Limited range (Wi-Fi)
- No obstacle detection
- Manual control only
- Voice recognition system
- Obstacle avoidance (Ultrasonic sensors)
- Camera for surveillance
- AI-based decision making
- Autonomous navigation
- Cloud integration
- Hardware wiring issues
- Wi-Fi connectivity stability
- Motor synchronization
- Power management
- Real-time response tuning
- Embedded systems design
- IoT communication (Wi-Fi)
- Motor control using drivers
- Arduino programming
- Hardware-software integration
This project successfully demonstrates the integration of IoT, robotics, and wireless control. It provides a strong foundation for building intelligent robotic systems and can be extended into advanced applications using AI and automation.