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ESP8266 WiFi Robot Car: A DIY Project with Arduino and Blynk



Robot Car Control Download: How to Build and Control Your Own Robot Car




Have you ever dreamed of building your own robot car and controlling it wirelessly from your smartphone or computer? If so, this article is for you. In this article, you will learn what a robot car is, why you should build one, what are the main components of a robot car, and what are the different methods of wireless control. You will also learn how to build a robot car using Arduino and ESP8266, and how to control it using different apps. By the end of this article, you will be able to create your own robot car and have fun with it.


Introduction




What is a robot car and why you should build one




A robot car is a vehicle that can move autonomously or remotely by following commands from a controller. A robot car can perform various tasks, such as obstacle avoidance, line following, object tracking, or remote surveillance. Building a robot car is a great way to learn about robotics, electronics, programming, and engineering. It is also a fun and creative hobby that can challenge your skills and imagination. You can customize your robot car according to your preferences and needs, and you can share your creations with others.




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What are the main components of a robot car




The main components of a robot car are:


  • A chassis: This is the frame or body of the robot car that supports all the other components.



  • Motors: These are the devices that provide motion to the wheels or tracks of the robot car.



  • A motor driver: This is a circuit that controls the speed and direction of the motors.



  • A microcontroller: This is a small computer that runs the code or program that controls the behavior of the robot car.



  • A wireless module: This is a device that enables communication between the microcontroller and the controller (such as a smartphone or computer).



  • A power source: This is a battery or adapter that provides electricity to the robot car.



  • Sensors: These are optional devices that can detect various physical phenomena, such as light, sound, distance, color, etc.



  • Actuators: These are optional devices that can perform actions, such as turning on lights, making sounds, moving arms, etc.



What are the different methods of wireless control




The different methods of wireless control are:


  • Bluetooth: This is a short-range wireless technology that uses radio waves to connect devices. Bluetooth is widely used for connecting smartphones, headphones, speakers, keyboards, mice, etc.



  • WiFi: This is a medium-range wireless technology that uses radio waves to connect devices. WiFi is widely used for connecting computers, routers, printers, cameras, etc.



  • Radio Frequency (RF): This is a long-range wireless technology that uses radio waves to connect devices. RF is widely used for connecting remote controls, radios, TVs, etc.



How to build a robot car using Arduino and ESP8266




Step 1: Gather the materials and tools




To build a robot car using Arduino and ESP8266, you will need the following materials and tools:


MaterialQuantityArduino Uno board1


ESP8266 WiFi module1


L298N motor driver1


Robot car chassis kit (with 4 wheels, 4 motors, and screws)1


Breadboard1


Jumper wiresSeveral


9V battery and holder1


USB cable1


Laptop or desktop computer1


Smartphone or tablet1


You will also need the following tools:


  • Screwdriver



  • Wire cutter and stripper



  • Soldering iron and solder (optional)



Arduino IDE software (download from


ESP8266 WiFi Robot Car app (download from


ELEGOO Smart Robot Car app (download from


Arduino Bluetooth Controller app (download from


Step 2: Assemble the chassis and motors




To assemble the chassis and motors, follow these steps:


  • Take the robot car chassis kit and unpack it.



  • Attach the four motors to the four corners of the chassis using screws.



  • Attach the four wheels to the four motors using screws.



  • Attach the battery holder to the center of the chassis using screws.



  • Your robot car chassis is ready.



Step 3: Connect the ESP8266 module and the motor driver




To connect the ESP8266 module and the motor driver, follow these steps:


  • Take the ESP8266 module and solder some male header pins to its pins. Alternatively, you can use a breadboard adapter for ESP8266.



  • Take the L298N motor driver and solder some male header pins to its pins. Alternatively, you can use a breadboard adapter for L298N.



  • Take the breadboard and place it on top of the chassis using some double-sided tape or glue.



  • Connect the ESP8266 module to the breadboard using jumper wires. Make sure to connect the VCC pin to 3.3V, the GND pin to GND, the TX pin to RX, and the RX pin to TX.



  • Connect the L298N motor driver to the breadboard using jumper wires. Make sure to connect the VCC pin to 5V, the GND pin to GND, the ENA pin to D5, the IN1 pin to D6, the IN2 pin to D7, the IN3 pin to D8, and the IN4 pin to D9.



  • Connect the four motors to the L298N motor driver using jumper wires. Make sure to connect each motor's positive wire to one of the OUT pins, and each motor's negative wire to another OUT pin.



  • Your ESP8266 module and motor driver are connected.



Step 4: Upload the code to the ESP8266 using Arduino IDE




To upload the code to the ESP8266 using Arduino IDE, follow these steps:



  • Connect your Arduino Uno board to your computer using a USB cable.



  • Open Arduino IDE software on your computer.



  • Select Tools > Board > Arduino Uno from the menu.



  • Select Tools > Port > COMX (where X is your Arduino port number) from the menu.



  • Copy and paste the following code into Arduino IDE:



// Robot Car Control Download: How to Build and Control Your Own Robot Car // Code for ESP8266 WiFi module #include


// WiFi credentials const char* ssid = "Your WiFi Name"; const char* password = "Your WiFi Password"; // WiFi server WiFiServer server(80); // Motor pins const int ena = 5; // D5 const int in1 = 6; // D6 const int in2 = 7; // D7 const int in3 = 8; // D8 const int in4 = 9; // D9 // Motor speed int speed = 255; // Command from controller String command = ""; void setup() // Initialize serial monitor Serial.begin(9600); // Initialize motor pins pinMode(ena, OUTPUT); pinMode(in1, OUTPUT); pinMode(in2, OUTPUT); pinMode(in3, OUTPUT); pinMode(in4, OUTPUT); // Stop the motors stop(); // Connect to WiFi network Serial.print("Connecting to "); Serial.println(ssid); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) delay(500); Serial.print("."); Serial.println(""); Serial.println("WiFi connected"); // Start the server server.begin(); Serial.println("Server started"); // Print the IP address Serial.print("Use this URL to connect: "); Serial.print(" Serial.print(WiFi.localIP()); Serial.println("/"); void loop() // Check if a client has connected WiFiClient client = server.available(); if (!client) return; // Wait until the client sends some data Serial.println("New client"); while(!client.available()) delay(1); // Read the first line of the request String request = client.readStringUntil('\r'); // Print the request Serial.println(request); // Get the value of the command parameter int index = request.indexOf("command="); if (index != -1) command = request.substring(index + 8, request.indexOf(" ", index + 8)); Serial.println(command); // Execute the command execute(command); // Return the response client.println("HTTP/1.1 200 OK"); client.println("Content-Type: text/html"); client.println(""); // do not forget this one client.println(""); client.println(""); client.println(""); client.println("Robot Car Control"); client.println(""); client.println(""); client.println("Robot Car Control


"); client.println("Use the buttons below to control your robot car.


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robot car control lego mindstorms ev3/nxt/rcx/boost/spike prime/education/we-do/robotics-invention-system/creator/download"); client.println(""); client.println(""); client.println(""); client.println(""); client.println(""); client.println(""); client.println(""); client.println(""); client.println(""); // Close the connection delay(1); Serial.println("Client disconnected"); // Function to execute the command void execute(String command) { // Function to execute the command void execute(String command) if (command == "forward") forward(); else if (command == "backward") backward(); else if (command == "left") left(); else if (command == "right") right(); else if (command == "stop") stop(); // Function to move the robot car forward void forward() analogWrite(ena, speed); digitalWrite(in1, HIGH); digitalWrite(in2, LOW); digitalWrite(in3, HIGH); digitalWrite(in4, LOW); // Function to move the robot car backward void backward() analogWrite(ena, speed); digitalWrite(in1, LOW); digitalWrite(in2, HIGH); digitalWrite(in3, LOW); digitalWrite(in4, HIGH); // Function to turn the robot car left void left() analogWrite(ena, speed); digitalWrite(in1, LOW); digitalWrite(in2, HIGH); digitalWrite(in3, HIGH); digitalWrite(in4, LOW); // Function to turn the robot car right void right() analogWrite(ena, speed); digitalWrite(in1, HIGH); digitalWrite(in2, LOW); digitalWrite(in3, LOW); digitalWrite(in4, HIGH); // Function to stop the robot car void stop() analogWrite(ena, 0); How to control your robot car using different apps




Once you have built and programmed your robot car using Arduino and ESP8266, you can control it using different apps on your smartphone or tablet. Here are some of the apps that you can use:


ESP8266 WiFi Robot Car app




This app is designed specifically for controlling your robot car using ESP8266 WiFi module. You can download it from To use this app, follow these steps:



  • Connect your smartphone or tablet to the same WiFi network as your ESP8266 module.



  • Open the app and enter the IP address of your ESP8266 module. You can find it in the serial monitor of Arduino IDE.



  • Tap on Connect button.



  • Use the buttons on the app to control your robot car.



ELEGOO Smart Robot Car app




This app is designed for controlling ELEGOO smart robot car kit, but you can also use it for controlling your own robot car using ESP8266 WiFi module. You can download it from To use this app, follow these steps:



  • Connect your smartphone or tablet to the same WiFi network as your ESP8266 module.



  • Open the app and tap on Scan button.



  • Select your ESP8266 module from the list of devices.



  • Use the buttons on the app to control your robot car.



Arduino Bluetooth Controller app




This app is designed for controlling Arduino projects using Bluetooth module. You can also use it for controlling your robot car using ESP8266 WiFi module. You can download it from To use this app, follow these steps:



  • Connect your smartphone or tablet to the same WiFi network as your ESP8266 module.



  • Open the app and tap on Connect button.



  • Select TCP/IP option and enter the IP address and port number of your ESP8266 module. You can find them in the serial monitor of Arduino IDE.



  • Tap on OK button.



  • Use the buttons on the app to control your robot car.



Conclusion




Summary of the main points




In this article, you have learned how to build and control your own robot car using Arduino and ESP8266. You have learned what a robot car is, why you should build one, what are the main components of a robot car, and what are the different methods of wireless control. You have also learned how to build a robot car using Arduino and ESP8266, and how to control it using different apps. By following this article, you have created your own robot car and had fun with it.


Call to action and further resources




If you enjoyed this article and want to learn more about robotics, electronics, programming, and engineering, you can check out these resources:



  • : This is the official website of Arduino, where you can find tutorials, projects, products, and community forums related to Arduino.



  • : This is a website that provides easy-to-follow tutorials and projects on Arduino, ESP8266, Raspberry Pi, and other electronics topics.



  • : This is a website that features user-submitted projects and instructions on various topics, including robotics, electronics, crafts, and more.



We hope you have enjoyed this article and learned something new. If you have any questions or feedback, please leave a comment below. And if you want to share your robot car creations with us, please send us a photo or video. We would love to see them.


FAQs




Here are some frequently asked questions and answers about robot car control download:



  • Q: How can I change the speed of the robot car?



  • A: You can change the speed of the robot car by changing the value of the speed variable in the code. The value can range from 0 to 255, where 0 means no speed and 255 means maximum speed. You can also use a potentiometer or a slider to adjust the speed dynamically.



  • Q: How can I add more features or functions to the robot car?



  • A: You can add more features or functions to the robot car by adding more sensors or actuators to the circuit and modifying the code accordingly. For example, you can add an ultrasonic sensor to measure distance and avoid obstacles, or you can add a buzzer to make sounds.



  • Q: How can I troubleshoot the robot car if it does not work properly?



  • A: You can troubleshoot the robot car by checking the following things:



  • Make sure that all the connections are correct and secure.



  • Make sure that the power source is sufficient and connected properly.



  • Make sure that the code is uploaded correctly and without errors.



  • Make sure that the WiFi network is stable and accessible.



  • Make sure that the app is compatible and configured correctly.



  • Q: How can I improve the performance or appearance of the robot car?



  • A: You can improve the performance or appearance of the robot car by doing the following things:



  • Use a better quality or higher capacity battery for longer run time.



  • Use a better quality or higher torque motor for faster or smoother movement.



  • Use a better quality or larger wheel for better traction or stability.



  • Use a better quality or more durable chassis for more strength or durability.



  • Add some decorations or accessories to make your robot car look more cool or unique.



  • Q: Where can I find more information or inspiration for building robot cars?



  • A: You can find more information or inspiration for building robot cars by visiting these websites:



  • : This is an article that showcases 10 amazing robot car projects that you can try at home.



  • : This is a video that shows how to make a robot car with wireless control using Arduino and Bluetooth module.



  • : This is a website that features various robot car projects made by Arduino users.



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