In this project, we'll create a WiFi-controlled car using NodeMCU and an app. This project is perfect for beginners looking to dive into the world of IoT and robotics. Let's get started!
Materials Needed:
- NodeMCU (ESP8266) board
- L298N motor driver module
- DC motors with wheels (x4)
- Car chassis
- 18650 batteries with holder
- Jumper wires
- Breadboard
- Smartphone with WiFi and a custom app
Step 1: Assemble the Car Chassis
1. Attach the DC Motors: Mount the DC motors to the car chassis. Secure them firmly so they don't move around.
2. Install Wheels: Attach the wheels to the DC motors.
3. Battery Placement: Place the battery holder on the chassis. Ensure it's easily accessible for battery changes.
Step 2: Connect the Electronics
1. Motor Driver to Motors:
- Connect the motor terminals to the L298N motor driver. Typically, Motor A to OUT1 and OUT2, and Motor B to OUT3 and OUT4.
2. Motor Driver to NodeMCU:
- IN1 to D1
- IN2 to D2
- IN3 to D3
- IN4 to D4
- ENA to D5 (for speed control using PWM)
- ENB to D6 (for speed control using PWM)
3. Power Connections:
- Connect the motor driver’s VCC to the battery pack’s positive terminal.
- Connect the GND to the battery pack’s negative terminal.
- Connect the motor driver’s 5V output to the NodeMCU’s VIN pin (if it has a 5V regulator, otherwise use 3.3V).
Step 3: Program the NodeMCU
1. Install Arduino IDE:
- Download and install the Arduino IDE.
2. Setup NodeMCU:
- Add the ESP8266 board manager to the Arduino IDE (File > Preferences > Additional Board Manager URLs).
- Install the ESP8266 board from the Boards Manager.
3. Write the Code: as given in the files
Step 4: Test Your Car
1. Power Up: Insert the batteries into the holder and power up your car.
2. Connect wifi Open the app{(App is available inside the ZIP File) and connect to your project.
3. Control the Car: Use the buttons on the app to control the car's movement.
Conclusion
By following these steps, you can create your own WiFi-controlled car using NodeMCU and a simple app. Happy building! For more projects and tutorials, visit our website and explore Skill-Hub by EmbeddedBrew to expand your skills in embedded systems.
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