Published January 27, 2021

WIFI Nodemcu Mobile Controlling Car

This project is very simple car with Nodemcu esp8266 that you can make a car control it over WIFI and gain more experience have fun

IntermediateFull instructions provided8,847

Things used in this project

Hardware components

mdf board in 14cm*10cm

2.2 AH li ion battery

Battery Holder, 18650 x 2

Adafruit Feather HUZZAH with ESP8266 WiFi

Jumper wires (generic)

Breadboard (generic)

battery for camera if you want camera

optional

esp32 cam

motor driver L298N

tt motor

wheels for tt motor

Rocker Switch, Non Illuminated

1 for car 1 for cam

Software apps and online services

Arduino IDE

Story

I made this myself and then I thought it would be good for beginners to start.

nodemcu will create a ap (access point) you with your device can connect to wifi and with the android application control car.

(camera is optional)

esp32-cam board will use ap created by nodemcu to stream video of car. i`ve used default program for esp32-cam. in the code you must choose your camera type mine is AI-THINKER.i chose that. almost all of camera is this type. when you give power to esp32-cam it will connect to nodemcu and give you ip in serial monitor. you can use that link in your browser for connecting to your camera and start streaming. if you are powering it using battery you have to download a application in your phone called "internet checker" OR "who is connected to my wifi " if you search these words you will find some application. feel free to ask question in the comments. =)

ESP8266=L298N Motor Driver

D3=Input 4

D4=Input 3

D5=Enable A

D6=Enable B

D7=Input 2

D8=Input 1

i didnt provide keys in wiring its so easy you can do it or search in google and find

Code

//AUTHOR by amirdadfar9192
  #define ENA   14          // Enable/speed motors Right        GPIO14(D5)
  #define ENB   12          // Enable/speed motors Left         GPIO12(D6)
  #define IN_1  15          // L298N in1 motors Rightx          GPIO15(D8)
  #define IN_2  13          // L298N in2 motors Right           GPIO13(D7)
  #define IN_3  2           // L298N in3 motors Left            GPIO2(D4)
  #define IN_4  0           // L298N in4 motors Left            GPIO0(D3)
  
  #include <ESP8266WiFi.h>
  #include <WiFiClient.h> 
  #include <ESP8266WebServer.h>
  
  String command;             //String to store app command state.
  int speedCar = 800;         // 400 - 1023.
  int speed_Coeff = 3;
  
  const char* ssid = "**************"; // put WIFI SSID for creating AP     
  const char* pass = "**************"; // put WIFI password for creating AP
  ESP8266WebServer server(80);
  
  void setup() {

 pinMode(ENA, OUTPUT);
 pinMode(ENB, OUTPUT);  
 pinMode(IN_1, OUTPUT);
 pinMode(IN_2, OUTPUT);
 pinMode(IN_3, OUTPUT);
 pinMode(IN_4, OUTPUT); 
  
  Serial.begin(115200);
  
// Connecting WiFi

  WiFi.mode(WIFI_AP);
  WiFi.softAP(ssid, pass);

  IPAddress myIP = WiFi.softAPIP();
  Serial.print("AP IP address: ");
  Serial.println(myIP);
 
 // Starting WEB-server 
     server.on ( "/", HTTP_handleRoot );
     server.onNotFound ( HTTP_handleRoot );
     server.begin();    
}

void goAhead(){ 
      
      digitalWrite(IN_1, LOW);
      digitalWrite(IN_2, HIGH);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, LOW);
      digitalWrite(IN_4, HIGH);
      analogWrite(ENB, speedCar);
  }

void goBack(){
   
      
      digitalWrite(IN_1, HIGH);
      digitalWrite(IN_2, LOW);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, HIGH);
      digitalWrite(IN_4, LOW);
      analogWrite(ENB, speedCar);
  }

void goRight(){ 
     
      digitalWrite(IN_1, HIGH);
      digitalWrite(IN_2, LOW);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, LOW);
      digitalWrite(IN_4, HIGH);
      analogWrite(ENB, speedCar);
  }

void goLeft(){
     
      digitalWrite(IN_1, LOW);
      digitalWrite(IN_2, HIGH);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, HIGH);
      digitalWrite(IN_4, LOW);
      analogWrite(ENB, speedCar);
  }

void goAheadRight(){
    
      digitalWrite(IN_1, LOW);
      digitalWrite(IN_2, HIGH);
      analogWrite(ENA, speedCar/speed_Coeff);
 
      digitalWrite(IN_3, LOW);
      digitalWrite(IN_4, HIGH);
      analogWrite(ENB, speedCar);
   }

void goAheadLeft(){
     
      digitalWrite(IN_1, LOW);
      digitalWrite(IN_2, HIGH);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, LOW);
      digitalWrite(IN_4, HIGH);
      analogWrite(ENB, speedCar/speed_Coeff);
  }

void goBackRight(){ 
      
      digitalWrite(IN_1, HIGH);
      digitalWrite(IN_2, LOW);
      analogWrite(ENA, speedCar/speed_Coeff);

      digitalWrite(IN_3, HIGH);
      digitalWrite(IN_4, LOW);
      analogWrite(ENB, speedCar);
  }

void goBackLeft(){ 
     
      digitalWrite(IN_1, HIGH);
      digitalWrite(IN_2, LOW);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, HIGH);
      digitalWrite(IN_4, LOW);
      analogWrite(ENB, speedCar/speed_Coeff);
  }

void stopRobot(){  
   
      digitalWrite(IN_1, LOW);
      digitalWrite(IN_2, LOW);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, LOW);
      digitalWrite(IN_4, LOW);
      analogWrite(ENB, speedCar);
 }

void loop() {
   
   
    server.handleClient();
    
    
      command = server.arg("State");
      
      if (command == "F") goAhead();
      else if (command == "B") goBack();
      else if (command == "L") goLeft();
      else if (command == "R") goRight();
      else if (command == "I") goAheadRight();
      else if (command == "G") goAheadLeft();
      else if (command == "J") goBackRight();
      else if (command == "H") goBackLeft();
      else if (command == "0") speedCar = 400;
      else if (command == "1") speedCar = 470;
      else if (command == "2") speedCar = 540;
      else if (command == "3") speedCar = 610;
      else if (command == "4") speedCar = 680;
      else if (command == "5") speedCar = 750;
      else if (command == "6") speedCar = 820;
      else if (command == "7") speedCar = 890;
      else if (command == "8") speedCar = 960;
      else if (command == "9") speedCar = 1023;
      else if (command == "S") stopRobot();
     
}

void HTTP_handleRoot(void) {

if( server.hasArg("State") ){
       Serial.println(server.arg("State"));
  }
  server.send ( 200, "text/html", "" );
  delay(1);
}

#include "esp_camera.h"
#include <WiFi.h>

//
// WARNING!!! Make sure that you have either selected ESP32 Wrover Module,
//            or another board which has PSRAM enabled
//

// Select camera model
//#define CAMERA_MODEL_WROVER_KIT
//#define CAMERA_MODEL_ESP_EYE
//#define CAMERA_MODEL_M5STACK_PSRAM
//#define CAMERA_MODEL_M5STACK_WIDE
#define CAMERA_MODEL_AI_THINKER

#include "camera_pins.h"

const char* ssid = "*******"; //wifi name and password that you entered in main car code
const char* password = "*******";

void startCameraServer();

void setup() {
  Serial.begin(115200);
  Serial.setDebugOutput(true);
  Serial.println();

  camera_config_t config;
  config.ledc_channel = LEDC_CHANNEL_0;
  config.ledc_timer = LEDC_TIMER_0;
  config.pin_d0 = Y2_GPIO_NUM;
  config.pin_d1 = Y3_GPIO_NUM;
  config.pin_d2 = Y4_GPIO_NUM;
  config.pin_d3 = Y5_GPIO_NUM;
  config.pin_d4 = Y6_GPIO_NUM;
  config.pin_d5 = Y7_GPIO_NUM;
  config.pin_d6 = Y8_GPIO_NUM;
  config.pin_d7 = Y9_GPIO_NUM;
  config.pin_xclk = XCLK_GPIO_NUM;
  config.pin_pclk = PCLK_GPIO_NUM;
  config.pin_vsync = VSYNC_GPIO_NUM;
  config.pin_href = HREF_GPIO_NUM;
  config.pin_sscb_sda = SIOD_GPIO_NUM;
  config.pin_sscb_scl = SIOC_GPIO_NUM;
  config.pin_pwdn = PWDN_GPIO_NUM;
  config.pin_reset = RESET_GPIO_NUM;
  config.xclk_freq_hz = 20000000;
  config.pixel_format = PIXFORMAT_JPEG;
  //init with high specs to pre-allocate larger buffers
  if(psramFound()){
    config.frame_size = FRAMESIZE_UXGA;
    config.jpeg_quality = 10;
    config.fb_count = 2;
  } else {
    config.frame_size = FRAMESIZE_SVGA;
    config.jpeg_quality = 12;
    config.fb_count = 1;
  }

#if defined(CAMERA_MODEL_ESP_EYE)
  pinMode(13, INPUT_PULLUP);
  pinMode(14, INPUT_PULLUP);
#endif

  // camera init
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    return;
  }

  sensor_t * s = esp_camera_sensor_get();
  //initial sensors are flipped vertically and colors are a bit saturated
  if (s->id.PID == OV3660_PID) {
    s->set_vflip(s, 1);//flip it back
    s->set_brightness(s, 1);//up the blightness just a bit
    s->set_saturation(s, -2);//lower the saturation
  }
  //drop down frame size for higher initial frame rate
  s->set_framesize(s, FRAMESIZE_QVGA);

#if defined(CAMERA_MODEL_M5STACK_WIDE)
  s->set_vflip(s, 1);
  s->set_hmirror(s, 1);
#endif

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");

  startCameraServer();

  Serial.print("Camera Ready! Use 'http://");
  Serial.print(WiFi.localIP());
  Serial.println("' to connect");
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10000);
}

Credits

amirhossein dadfar

1 project • 0 followers

WIFI Nodemcu Mobile Controlling Car

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

main car

camera wiring

Code

nodemcu

app

camera code

Credits

amirhossein dadfar

Comments

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WIFI Nodemcu Mobile Controlling Car

WIFI Nodemcu Mobile Controlling Car

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

main car

camera wiring

Code

nodemcu

app

camera code

Credits

amirhossein dadfar

Comments

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