DIY WIFI RC Car With ESP8266 and Arduino IDE

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About: Software, electronics, do-it-yourself
This project is an example of remotely controlled car via WIFI. The circuit is based on ESP8266, and the software is written in the Arduino IDE. As an engine driver, I used the L298N. The vehicle's speed is controlled by PWM in the range of 0 to 1023. Digital control offers more possibilities than the usual controller. I also added a RGB LED as light and buzzer as a horn.

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DIY WIFI RC car with ESP8266 and Arduino IDE

Step 1: Components

Components that I used in this project.

Step 2: Schematic

Diagram of a remote controlled car.

Step 3: Software for ESP8266

Before you upload the software to ESP8266 setup your WiFi connection.
	#define WIFI_SSID ""
	#define WIFI_PASSWORD ""
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <WiFiUdp.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <Adafruit_NeoPixel.h>

#define PIN D8
#define LICZBADIOD 1
 
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(LICZBADIOD, PIN, NEO_GRB + NEO_KHZ800);

//---------------------------------------

#define CMD_NONE 0
#define CMD_LED 1

typedef struct TRCcar{
  short speed;
  short turn;
  uint8_t flags;

  uint8_t cmd;

  uint8_t r;
  uint8_t g;
  uint8_t b;
};

//---------------------------------------

//const char COMPILED[] PROGMEM  = { __DATE__ " " __TIME__ };
#define WIFI_SSID ""
#define WIFI_PASS ""

int cnt_loop = 0;
long time_loop;

//---------------------------------------

void setup() {
  Serial.begin(115200);
  Serial.println( "\r\n\r\n--------------------------------------" );
  Serial.println( "START setup" );
  delay(500);
  
  BlinkLedSteup();
  MotroSetupA();
  MotroSetupB();

  //---------------------------------
  WiFi.mode(WIFI_STA);
  //WiFi.mode(WIFI_AP_STA);
  //Serial.print("Setting soft-AP ... ");
  //Serial.println(WiFi.softAP(GetNameDev().c_str(), "1234") ? "Ready" : "Failed!");
  //Serial.println(WiFi.softAP("ESP8266-test", "1234") ? "Ready" : "Failed!");
  
  WiFi.begin(WIFI_SSID, WIFI_PASS);
  //WiFi.hostname( GetNameDev() );

  Serial.print("Connecting to WIFI");

  // Wait for connection
  while( WiFi.status() != WL_CONNECTED ) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to ");
  Serial.println( WIFI_SSID );
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  //---------------------------------
  UDPSetup();
  BeepSetup();

  pixels.begin();
  //pixels.setPixelColor(0, 255, 0, 0);
  //pixels.show();
  
  Serial.println( "END setup" );
}


void loop() {
  time_loop = millis();
  
  BlinkLed();
  SerialEvent();
  SerialCMD();
  UDPLoop();
  BeepLoop();
}
Download source code

Step 4: Computer Control Software

The program I control wrote in C #. For PC communication with ESP8266 I used UDP protocol. All commands are executed immediately without delay. The car is driving great, I think much better than the original controller.

Step 5: Test Drive

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    8 Discussions

    0
    None
    MartinK238

    Question 25 days ago on Step 5

    can we controll it va smartphone !? is this possible ? Or should i buy a old rc controll case ? Love to hear from you. Greetings

    0
    None
    MartinK238

    25 days ago

    bro - which rc controll case did you use

    0
    None
    AdityaB102

    7 weeks ago

    is it work on the same wi-fi only or we can move car from everywhere?

    0
    None
    HristoB

    10 months ago

    I've ordered a nodemcu just from pure curiosity, this looks perfect for a trial project. Thank you for sharing

    0
    None
    amit2017

    1 year ago

    Bro where is the link or file to

    Computer Control Software
    0
    None
    AhmedI44adachsoft

    Reply 1 year ago

    thanks man

    i just started with nodemcu and so far only your codes seems to work

    I am not good at programming

    i need help to control it from android device using roboremo app