Tag Archives: Elegoo

In this video lesson we show how to use the HC-SR04 ultrasonic sensor to detect the distance to obstacles in a robotic application. We use the sensor to measure the time it takes for a ping to travel from the sensor, to the target, and then back. We use this measured time, and the known speed of sound to calculate the distance to the target. This will be used in future lessons to keep the robot from running into an obstacle.

int Trig=A5;
int Echo=A4;
int pingT;
float targetDistance;
void setup() {
  // put your setup code here, to run once:
pinMode(Trig,OUTPUT);
pinMode(Echo,INPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
targetDistance=measDist();
Serial.println(targetDistance);
delay(500);

}

int pingTime(){
  int pingTravelTime;
  digitalWrite(Trig, LOW);   
  delayMicroseconds(2);
  digitalWrite(Trig, HIGH);  
  delayMicroseconds(20);
  digitalWrite(Trig, LOW);   
  pingTravelTime = pulseIn(Echo, HIGH);        
  return pingTravelTime; 
}
float measDist(){
  int pingTravelTime;
  float Dist;
  pingTravelTime=pingTime();
  Dist=(pingTravelTime*761.*5280.*12.)/(1000000.*3600.);
  Dist=Dist/2;
  return Dist;
}

int Trig=A5;

int Echo=A4;

int pingT;

float targetDistance;

void setup() {

// put your setup code here, to run once:

pinMode(Trig,OUTPUT);

pinMode(Echo,INPUT);

Serial.begin(9600);

}

void loop() {

// put your main code here, to run repeatedly:

targetDistance=measDist();

Serial.println(targetDistance);

delay(500);

}

int pingTime(){

int pingTravelTime;

digitalWrite(Trig, LOW);

delayMicroseconds(2);

digitalWrite(Trig, HIGH);

delayMicroseconds(20);

digitalWrite(Trig, LOW);

pingTravelTime = pulseIn(Echo, HIGH);

return pingTravelTime;

}

float measDist(){

int pingTravelTime;

float Dist;

pingTravelTime=pingTime();

Dist=(pingTravelTime*761.*5280.*12.)/(1000000.*3600.);

Dist=Dist/2;

return Dist;

}

Elegoo Smart Car Tutorial

Robotics Training LESSON 15: Using the BLE Bluetooth Module for Robotic Control

September 17, 2020 admin

In this lesson we show how to control the Elegoo Smart Car Robot Kit using the Bluetooth module. This allows much more accurate control than what was possible with the IR Remote. Below is the code which we developed in the lesson.

int ENA=5;
int ENB=6;
int IN1=7;
int IN2=8;
int IN3=9;
int IN4=11;
float d=1;
int degRot=90;
int left;
int right;
float v=1.2;
int rv;
char cmd;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);


pinMode(ENA,OUTPUT);
pinMode(ENB,OUTPUT);
pinMode(IN1,OUTPUT);
pinMode(IN2,OUTPUT);
pinMode(IN3,OUTPUT);
pinMode(IN4,OUTPUT);
digitalWrite(ENA,HIGH);
digitalWrite(ENB,HIGH);
}

void loop() {
int wv;
//v=1.2;
//d=1;
wv=(v-.35)/.0075;
left=wv;
right=wv;
setSpeed(left,right);
while (Serial.available()==0){
}
cmd=Serial.read();
if (cmd=='G'){
  Serial.println("Forward");
  forward(d,v);  
}
if (cmd=='B'){
  Serial.println("Backward");
  backward(d,v);  
}
if (cmd=='R'){
  Serial.println("Right");
  turnRight(degRot,wv);  
}
if (cmd=='L'){
  Serial.println("Left");
  turnLeft(degRot,wv);  
}
//If Command Was Pound, Set Distance
if (cmd=='d'){
  Serial.println("Set distance");
  delay(500);

  while (Serial.available()==0){
  }
cmd=Serial.read();

    if (cmd=='1'){
    Serial.println("Distance=1");
    d=1;
  }
    if (cmd=='2'){
    Serial.println("Distance=2");
    d=2;
  }
      if (cmd=='3'){
    Serial.println("Distance=3");
    d=3;
  }
      if (cmd=='4'){
    Serial.println("Distance=4");
    d=4;
  }
      if (cmd=='5'){
    Serial.println("Distance=5");
    d=5;
  }
      if (cmd=='6'){
    Serial.println("Distance=6");
    d=6;
  }
      if (cmd=='7'){
    Serial.println("Distance=7");
    d=7;
  }
      if (cmd=='8'){
    Serial.println("Distance=8");
    d=8;
  }
      if (cmd=='9'){
    Serial.println("Distance=9");
    d=9;
  }
}

//If Command Was star, Set Speed
if (cmd=='v'){
  Serial.println("Set speed");
  delay(500);
   while (Serial.available()==0){
    
  }
  delay(100);
  cmd=Serial.read();
    if (cmd=='1'){
    Serial.println("rv=1");
    rv=1;
  }
    if (cmd=='2'){
    Serial.println("rv=2");
    rv=2;
  }
      if (cmd=='3'){
    Serial.println("rv=3");
    rv=3;
  }
      if (cmd=='4'){
    Serial.println("rv=4");
    rv=4;
  }
      if (cmd=='5'){
    Serial.println("rv=5");
    rv=5;
  }
      if (cmd=='6'){
    Serial.println("rv=6");
    rv=6;
  }
      if (cmd=='7'){
    Serial.println("rv=7");
    rv=7;
  }
      if (cmd=='8'){
    Serial.println("rv=8");
    rv=8;
  }
      if (cmd=='9'){
    Serial.println("rv=9");
    rv=9;
  }
  v=(1.16/9.)*rv+1.1;




}
}
void setSpeed(int leftVal,int rightVal){
  analogWrite(ENA,leftVal);
  analogWrite(ENB,rightVal);
}
void forward(float d, float v){
float t;
digitalWrite(IN1,HIGH);
digitalWrite(IN2,LOW);
digitalWrite(IN3,LOW);
digitalWrite(IN4,HIGH);
t=d/v*1000;
delay(t);
stopCar();
}
void backward(float d, float v){
float t;
digitalWrite(IN1,LOW);
digitalWrite(IN2,HIGH);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW);
t=d/v*1000;
delay(t);
stopCar();
}
void turnRight(int deg, int wv){
  float t;
stopCar();
delay(100);
analogWrite(ENA,125);
analogWrite(ENB,125);
digitalWrite(IN1,HIGH);
digitalWrite(IN2,LOW);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW);
t=(deg+6)/136.29*1000.;
delay(t);
stopCar();
analogWrite(ENA,wv);
analogWrite(ENB,wv);
}
void turnLeft(int deg, int wv){
float t;
analogWrite(ENA,125);
analogWrite(ENB,125);
digitalWrite(IN1,LOW);
digitalWrite(IN2,HIGH);
digitalWrite(IN3,LOW);
digitalWrite(IN4,HIGH);
t=(deg+6)/136.29*1000.;
delay(t);
stopCar();
analogWrite(ENA,wv);
analogWrite(ENB,wv);
}
void stopCar(){
digitalWrite(IN1,LOW);
digitalWrite(IN2,LOW);
digitalWrite(IN3,LOW);
digitalWrite(IN4,LOW);
}

void calF(){
digitalWrite(IN1,HIGH);
digitalWrite(IN2,LOW);
digitalWrite(IN3,LOW);
digitalWrite(IN4,HIGH);
delay(5000);
stopCar();
}
void calB(){
digitalWrite(IN1,LOW);
digitalWrite(IN2,HIGH);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW);
delay(5000);
stopCar();
}
void calR(int wv){
stopCar();
analogWrite(ENA,125);
analogWrite(ENB,125);
digitalWrite(IN1,HIGH);
digitalWrite(IN2,LOW);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW);
delay(3000);
analogWrite(ENA,wv);
analogWrite(ENB,wv);
stopCar();
}
void calL(int wv){
analogWrite(ENA,125);
analogWrite(ENB,125);
digitalWrite(IN1,LOW);
digitalWrite(IN2,HIGH);
digitalWrite(IN3,LOW);
digitalWrite(IN4,HIGH);
delay(5000);
analogWrite(ENA,wv);
analogWrite(ENB,wv);
stopCar();
}

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int ENA=5;

int ENB=6;

int IN1=7;

int IN2=8;

int IN3=9;

int IN4=11;

float d=1;

int degRot=90;

int left;

int right;

float v=1.2;

int rv;

char cmd;

void setup() {

// put your setup code here, to run once:

Serial.begin(9600);

pinMode(ENA,OUTPUT);

pinMode(ENB,OUTPUT);

pinMode(IN1,OUTPUT);

pinMode(IN2,OUTPUT);

pinMode(IN3,OUTPUT);

pinMode(IN4,OUTPUT);

digitalWrite(ENA,HIGH);

digitalWrite(ENB,HIGH);

}

void loop() {

int wv;

//v=1.2;

//d=1;

wv=(v-.35)/.0075;

left=wv;

right=wv;

setSpeed(left,right);

while (Serial.available()==0){

}

cmd=Serial.read();

if (cmd=='G'){

Serial.println("Forward");

forward(d,v);

}

if (cmd=='B'){

Serial.println("Backward");

backward(d,v);

}

if (cmd=='R'){

Serial.println("Right");

turnRight(degRot,wv);

}

if (cmd=='L'){

Serial.println("Left");

turnLeft(degRot,wv);

}

//If Command Was Pound, Set Distance

if (cmd=='d'){

Serial.println("Set distance");

delay(500);

while (Serial.available()==0){

}

cmd=Serial.read();

if (cmd=='1'){

Serial.println("Distance=1");

d=1;

}

if (cmd=='2'){

Serial.println("Distance=2");

d=2;

}

if (cmd=='3'){

Serial.println("Distance=3");

d=3;

}

if (cmd=='4'){

Serial.println("Distance=4");

d=4;

}

if (cmd=='5'){

Serial.println("Distance=5");

d=5;

}

if (cmd=='6'){

Serial.println("Distance=6");

d=6;

}

if (cmd=='7'){

Serial.println("Distance=7");

d=7;

}

if (cmd=='8'){

Serial.println("Distance=8");

d=8;

}

if (cmd=='9'){

Serial.println("Distance=9");

d=9;

}

//If Command Was star, Set Speed

if (cmd=='v'){

Serial.println("Set speed");

delay(500);

while (Serial.available()==0){

}

delay(100);

cmd=Serial.read();

if (cmd=='1'){

Serial.println("rv=1");

rv=1;

}

if (cmd=='2'){

Serial.println("rv=2");

rv=2;

}

if (cmd=='3'){

Serial.println("rv=3");

rv=3;

}

if (cmd=='4'){

Serial.println("rv=4");

rv=4;

}

if (cmd=='5'){

Serial.println("rv=5");

rv=5;

}

if (cmd=='6'){

Serial.println("rv=6");

rv=6;

}

if (cmd=='7'){

Serial.println("rv=7");

rv=7;

}

if (cmd=='8'){

Serial.println("rv=8");

rv=8;

}

if (cmd=='9'){

Serial.println("rv=9");

rv=9;

}

v=(1.16/9.)*rv+1.1;

}

void setSpeed(int leftVal,int rightVal){

analogWrite(ENA,leftVal);

analogWrite(ENB,rightVal);

}

void forward(float d, float v){

float t;

digitalWrite(IN1,HIGH);

digitalWrite(IN2,LOW);

digitalWrite(IN3,LOW);

digitalWrite(IN4,HIGH);

t=d/v*1000;

delay(t);

stopCar();

}

void backward(float d, float v){

float t;

digitalWrite(IN1,LOW);

digitalWrite(IN2,HIGH);

digitalWrite(IN3,HIGH);

digitalWrite(IN4,LOW);

t=d/v*1000;

delay(t);

stopCar();

}

void turnRight(int deg, int wv){

float t;

stopCar();

delay(100);

analogWrite(ENA,125);

analogWrite(ENB,125);

digitalWrite(IN1,HIGH);

digitalWrite(IN2,LOW);

digitalWrite(IN3,HIGH);

digitalWrite(IN4,LOW);

t=(deg+6)/136.29*1000.;

delay(t);

stopCar();

analogWrite(ENA,wv);

analogWrite(ENB,wv);

}

void turnLeft(int deg, int wv){

float t;

analogWrite(ENA,125);

analogWrite(ENB,125);

digitalWrite(IN1,LOW);

digitalWrite(IN2,HIGH);

digitalWrite(IN3,LOW);

digitalWrite(IN4,HIGH);

t=(deg+6)/136.29*1000.;

delay(t);

stopCar();

analogWrite(ENA,wv);

analogWrite(ENB,wv);

}

void stopCar(){

digitalWrite(IN1,LOW);

digitalWrite(IN2,LOW);

digitalWrite(IN3,LOW);

digitalWrite(IN4,LOW);

}

void calF(){

digitalWrite(IN1,HIGH);

digitalWrite(IN2,LOW);

digitalWrite(IN3,LOW);

digitalWrite(IN4,HIGH);

delay(5000);

stopCar();

}

void calB(){

digitalWrite(IN1,LOW);

digitalWrite(IN2,HIGH);

digitalWrite(IN3,HIGH);

digitalWrite(IN4,LOW);

delay(5000);

stopCar();

}

void calR(int wv){

stopCar();

analogWrite(ENA,125);

analogWrite(ENB,125);

digitalWrite(IN1,HIGH);

digitalWrite(IN2,LOW);

digitalWrite(IN3,HIGH);

digitalWrite(IN4,LOW);

delay(3000);

analogWrite(ENA,wv);

analogWrite(ENB,wv);

stopCar();

}

void calL(int wv){

analogWrite(ENA,125);

analogWrite(ENB,125);

digitalWrite(IN1,LOW);

digitalWrite(IN2,HIGH);

digitalWrite(IN3,LOW);

digitalWrite(IN4,HIGH);

delay(5000);

analogWrite(ENA,wv);

analogWrite(ENB,wv);

stopCar();

}

Elegoo Smart Car Tutorial

Robotics Training LESSON 14: Using the BLE Bluetooth Module to Control the Arduino Elegoo Smart Car

September 10, 2020 admin

In this lesson we learn how to use bluetooth with the Arduino. We show how you can control the Elegoo Smart Car from a Bluetooth App. We show how to download the app on your phone, and then how to program the Ap to control the smart car.

int ENA=5; 
int ENB=6; 
int IN1=7; 
int IN2=8; 
int IN3=9; 
int IN4=11; 
float d; 
int degRot; 
char cmd;
void setup() { 
  // put your setup code here, to run once: 
  Serial.begin(9600); 
  pinMode(ENA,OUTPUT); 
  pinMode(ENB,OUTPUT); 
  pinMode(IN1,OUTPUT); 
  pinMode(IN2,OUTPUT); 
  pinMode(IN3,OUTPUT); 
  pinMode(IN4,OUTPUT); 
  digitalWrite(ENA,HIGH); 
  digitalWrite(ENB,HIGH); 
  } 
  void loop() { 
    while (Serial.available()==0){
    }
    cmd=Serial.read();
    if (cmd=='f'){
      forward(4);
    }
    if (cmd=='b'){
      backward(4);
    }
    if (cmd=='r'){
      turnRight(180);
    }
    if (cmd=='l'){
      turnLeft(180);
    }
    } 
    void forward(float d){ 
      float t; 
      digitalWrite(IN1,HIGH); 
      digitalWrite(IN2,LOW); 
      digitalWrite(IN3,LOW); 
      digitalWrite(IN4,HIGH); 
      t=d/2.45*1000; 
      delay(t); 
      stopCar(); 
      } 
      void backward(float d){ 
      float t; 
      digitalWrite(IN1,LOW); 
      digitalWrite(IN2,HIGH); 
      digitalWrite(IN3,HIGH); 
      digitalWrite(IN4,LOW); 
      t=d/2.45*1000; delay(t); 
      stopCar(); 
      } 
      void turnRight(int deg){ 
        float t; 
        digitalWrite(IN1,HIGH); 
        digitalWrite(IN2,LOW); 
        digitalWrite(IN3,HIGH); 
        digitalWrite(IN4,LOW); 
        t=deg/345.*1000.; 
        Serial.println(deg); 
        delay(t); stopCar(); 
        } 
        void turnLeft(float deg){ 
          float t; 
          digitalWrite(IN1,LOW); 
          digitalWrite(IN2,HIGH); 
          digitalWrite(IN3,LOW); 
          digitalWrite(IN4,HIGH); 
          t=deg/345.*1000.; 
          Serial.println(deg); 
          delay(t); stopCar(); 
          } 
          void stopCar(){ 
            digitalWrite(IN1,LOW); 
            digitalWrite(IN2,LOW); 
            digitalWrite(IN3,LOW); 
            digitalWrite(IN4,LOW); 
            } 
            void calF(){ 
             digitalWrite(IN1,HIGH); 
             digitalWrite(IN2,LOW); 
             digitalWrite(IN3,LOW); 
             digitalWrite(IN4,HIGH); 
             delay(5000); stopCar(); 
             } 
             void calB(){ 
              digitalWrite(IN1,LOW); 
              digitalWrite(IN2,HIGH); 
              digitalWrite(IN3,HIGH); 
              digitalWrite(IN4,LOW); 
              delay(5000); 
              stopCar(); 
              } 
              void calR(){ 
                digitalWrite(IN1,HIGH); 
                digitalWrite(IN2,LOW); 
                digitalWrite(IN3,HIGH); 
                digitalWrite(IN4,LOW); 
                delay(5000); stopCar(); 
                } 
                void calL(){ 
                  digitalWrite(IN1,LOW); 
                  digitalWrite(IN2,HIGH); 
                  digitalWrite(IN3,LOW); 
                  digitalWrite(IN4,HIGH); 
                  delay(5000); 
                  stopCar(); 
                  }

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int ENA=5;

int ENB=6;

int IN1=7;

int IN2=8;

int IN3=9;

int IN4=11;

float d;

int degRot;

char cmd;

void setup() {

// put your setup code here, to run once:

Serial.begin(9600);

pinMode(ENA,OUTPUT);

pinMode(ENB,OUTPUT);

pinMode(IN1,OUTPUT);

pinMode(IN2,OUTPUT);

pinMode(IN3,OUTPUT);

pinMode(IN4,OUTPUT);

digitalWrite(ENA,HIGH);

digitalWrite(ENB,HIGH);

}

void loop() {

while (Serial.available()==0){

}

cmd=Serial.read();

if (cmd=='f'){

forward(4);

}

if (cmd=='b'){

backward(4);

}

if (cmd=='r'){

turnRight(180);

}

if (cmd=='l'){

turnLeft(180);

}

void forward(float d){

float t;

digitalWrite(IN1,HIGH);

digitalWrite(IN2,LOW);

digitalWrite(IN3,LOW);

digitalWrite(IN4,HIGH);

t=d/2.45*1000;

delay(t);

stopCar();

}

void backward(float d){

float t;

digitalWrite(IN1,LOW);

digitalWrite(IN2,HIGH);

digitalWrite(IN3,HIGH);

digitalWrite(IN4,LOW);

t=d/2.45*1000; delay(t);

stopCar();

}

void turnRight(int deg){

float t;

digitalWrite(IN1,HIGH);

digitalWrite(IN2,LOW);

digitalWrite(IN3,HIGH);

digitalWrite(IN4,LOW);

t=deg/345.*1000.;

Serial.println(deg);

delay(t); stopCar();

}

void turnLeft(float deg){

float t;

digitalWrite(IN1,LOW);

digitalWrite(IN2,HIGH);

digitalWrite(IN3,LOW);

digitalWrite(IN4,HIGH);

t=deg/345.*1000.;

Serial.println(deg);

delay(t); stopCar();

}

void stopCar(){

digitalWrite(IN1,LOW);

digitalWrite(IN2,LOW);

digitalWrite(IN3,LOW);

digitalWrite(IN4,LOW);

}

void calF(){

digitalWrite(IN1,HIGH);

digitalWrite(IN2,LOW);

digitalWrite(IN3,LOW);

digitalWrite(IN4,HIGH);

delay(5000); stopCar();

}

void calB(){

digitalWrite(IN1,LOW);

digitalWrite(IN2,HIGH);

digitalWrite(IN3,HIGH);

digitalWrite(IN4,LOW);

delay(5000);

stopCar();

}

void calR(){

digitalWrite(IN1,HIGH);

digitalWrite(IN2,LOW);

digitalWrite(IN3,HIGH);

digitalWrite(IN4,LOW);

delay(5000); stopCar();

}

void calL(){

digitalWrite(IN1,LOW);

digitalWrite(IN2,HIGH);

digitalWrite(IN3,LOW);

digitalWrite(IN4,HIGH);

delay(5000);

stopCar();

}

Elegoo Smart Car Tutorial

Robotics Training LESSON 12: Programming Travel Distance with Infrared (IR) Remote

August 27, 2020 admin

In this lesson we show how to use the Infrared (IR) Remote to program the Elegoo Smart Car. We use the remote to specify the distance in feet we want the robot car to travel. (If you guys want to play along at home, you can pick up your robot car HERE.)

#include <IRremote.h>
int IRpin=12;
IRrecv IR(IRpin);
decode_results cmd;

int ENA=5;
int ENB=6;
int IN1=7;
int IN2=8;
int IN3=9;
int IN4=11;
float d=1;
int degRot=90;
int left;
int right;
float v=1.2;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
IR.enableIRIn();
IR.blink13(true);

pinMode(ENA,OUTPUT);
pinMode(ENB,OUTPUT);
pinMode(IN1,OUTPUT);
pinMode(IN2,OUTPUT);
pinMode(IN3,OUTPUT);
pinMode(IN4,OUTPUT);
digitalWrite(ENA,HIGH);
digitalWrite(ENB,HIGH);
}

void loop() {
int wv;
//v=1.2;
//d=1;
wv=(v-.35)/.0075;
left=wv;
right=wv;
setSpeed(left,right);
while (IR.decode(&cmd)==0){
  
}

Serial.println(cmd.value,HEX);
if (cmd.value==0xFF629D){
  Serial.println("Forward");
  forward(d,v);  
}
if (cmd.value==0xFFA857){
  Serial.println("Backward");
  backward(d,v);  
}
if (cmd.value==0xFFC23D){
  Serial.println("Right");
  turnRight(degRot,wv);  
}
if (cmd.value==0xFF22DD){
  Serial.println("Left");
  turnLeft(degRot,wv);  
}
//If Command Was Pound, Set Distance
if (cmd.value==0xFF52AD){
  Serial.println("Set distance");
  delay(500);
  IR.resume();
  while (IR.decode(&cmd)==0){
  }
  delay(100);
  if (cmd.value==0xFF4AB5){
    Serial.println("Distance=0");
    d=0;
  }
    if (cmd.value==0xFF6897){
    Serial.println("Distance=1");
    d=1;
  }
    if (cmd.value==0xFF9867){
    Serial.println("Distance=2");
    d=2;
  }
      if (cmd.value==0xFFB04F){
    Serial.println("Distance=3");
    d=3;
  }
      if (cmd.value==0xFF30CF){
    Serial.println("Distance=4");
    d=4;
  }
      if (cmd.value==0xFF18E7){
    Serial.println("Distance=5");
    d=5;
  }
      if (cmd.value==0xFF7A85){
    Serial.println("Distance=6");
    d=6;
  }
      if (cmd.value==0xFF10EF){
    Serial.println("Distance=7");
    d=7;
  }
      if (cmd.value==0xFF38C7){
    Serial.println("Distance=8");
    d=8;
  }
      if (cmd.value==0xFF5AA5){
    Serial.println("Distance=9");
    d=9;
  }
  
}

//If Command Was star, Set Speed
if (cmd.value==0xFF42BD){
  Serial.println("Set speed");
  delay(500);
  IR.resume();
   while (IR.decode(&cmd)==0){
    
  }
  delay(100);
  Serial.println(cmd.value,HEX);
 
}


IR.resume();
//calR(wv);
//forward(8,v);
//v=1.5;
//wv=(v-.35)/.0075;
//left=wv;
//right=wv;
//setSpeed(left,right);
//backward(8,v);

}
void setSpeed(int leftVal,int rightVal){
  analogWrite(ENA,leftVal);
  analogWrite(ENB,rightVal);
}
void forward(float d, float v){
float t;
digitalWrite(IN1,HIGH);
digitalWrite(IN2,LOW);
digitalWrite(IN3,LOW);
digitalWrite(IN4,HIGH);
t=d/v*1000;
delay(t);
stopCar();
}
void backward(float d, float v){
float t;
digitalWrite(IN1,LOW);
digitalWrite(IN2,HIGH);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW);
t=d/v*1000;
delay(t);
stopCar();
}
void turnRight(int deg, int wv){
  float t;
stopCar();
delay(100);
analogWrite(ENA,125);
analogWrite(ENB,125);
digitalWrite(IN1,HIGH);
digitalWrite(IN2,LOW);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW);
t=(deg+6)/136.29*1000.;
delay(t);
stopCar();
analogWrite(ENA,wv);
analogWrite(ENB,wv);
}
void turnLeft(int deg, int wv){
float t;
analogWrite(ENA,125);
analogWrite(ENB,125);
digitalWrite(IN1,LOW);
digitalWrite(IN2,HIGH);
digitalWrite(IN3,LOW);
digitalWrite(IN4,HIGH);
t=(deg+6)/136.29*1000.;
delay(t);
stopCar();
analogWrite(ENA,wv);
analogWrite(ENB,wv);
}
void stopCar(){
digitalWrite(IN1,LOW);
digitalWrite(IN2,LOW);
digitalWrite(IN3,LOW);
digitalWrite(IN4,LOW);
}

void calF(){
digitalWrite(IN1,HIGH);
digitalWrite(IN2,LOW);
digitalWrite(IN3,LOW);
digitalWrite(IN4,HIGH);
delay(5000);
stopCar();
}
void calB(){
digitalWrite(IN1,LOW);
digitalWrite(IN2,HIGH);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW);
delay(5000);
stopCar();
}
void calR(int wv){
stopCar();
analogWrite(ENA,125);
analogWrite(ENB,125);
digitalWrite(IN1,HIGH);
digitalWrite(IN2,LOW);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW);
delay(3000);
analogWrite(ENA,wv);
analogWrite(ENB,wv);
stopCar();
}
void calL(int wv){
analogWrite(ENA,125);
analogWrite(ENB,125);
digitalWrite(IN1,LOW);
digitalWrite(IN2,HIGH);
digitalWrite(IN3,LOW);
digitalWrite(IN4,HIGH);
delay(5000);
analogWrite(ENA,wv);
analogWrite(ENB,wv);
stopCar();
}

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#include <IRremote.h>

int IRpin=12;

IRrecv IR(IRpin);

decode_results cmd;

int ENA=5;

int ENB=6;

int IN1=7;

int IN2=8;

int IN3=9;

int IN4=11;

float d=1;

int degRot=90;

int left;

int right;

float v=1.2;

void setup() {

// put your setup code here, to run once:

Serial.begin(9600);

IR.enableIRIn();

IR.blink13(true);

pinMode(ENA,OUTPUT);

pinMode(ENB,OUTPUT);

pinMode(IN1,OUTPUT);

pinMode(IN2,OUTPUT);

pinMode(IN3,OUTPUT);

pinMode(IN4,OUTPUT);

digitalWrite(ENA,HIGH);

digitalWrite(ENB,HIGH);

}

void loop() {

int wv;

//v=1.2;

//d=1;

wv=(v-.35)/.0075;

left=wv;

right=wv;

setSpeed(left,right);

while (IR.decode(&cmd)==0){

}

Serial.println(cmd.value,HEX);

if (cmd.value==0xFF629D){

Serial.println("Forward");

forward(d,v);

}

if (cmd.value==0xFFA857){

Serial.println("Backward");

backward(d,v);

}

if (cmd.value==0xFFC23D){

Serial.println("Right");

turnRight(degRot,wv);

}

if (cmd.value==0xFF22DD){

Serial.println("Left");

turnLeft(degRot,wv);

}

//If Command Was Pound, Set Distance

if (cmd.value==0xFF52AD){

Serial.println("Set distance");

delay(500);

IR.resume();

while (IR.decode(&cmd)==0){

}

delay(100);

if (cmd.value==0xFF4AB5){

Serial.println("Distance=0");

d=0;

}

if (cmd.value==0xFF6897){

Serial.println("Distance=1");

d=1;

}

if (cmd.value==0xFF9867){

Serial.println("Distance=2");

d=2;

}

if (cmd.value==0xFFB04F){

Serial.println("Distance=3");

d=3;

}

if (cmd.value==0xFF30CF){

Serial.println("Distance=4");

d=4;

}

if (cmd.value==0xFF18E7){

Serial.println("Distance=5");

d=5;

}

if (cmd.value==0xFF7A85){

Serial.println("Distance=6");

d=6;

}

if (cmd.value==0xFF10EF){

Serial.println("Distance=7");

d=7;

}

if (cmd.value==0xFF38C7){

Serial.println("Distance=8");

d=8;

}

if (cmd.value==0xFF5AA5){

Serial.println("Distance=9");

d=9;

}

//If Command Was star, Set Speed

if (cmd.value==0xFF42BD){

Serial.println("Set speed");

delay(500);

IR.resume();

while (IR.decode(&cmd)==0){

}

delay(100);

Serial.println(cmd.value,HEX);

}

IR.resume();

//calR(wv);

//forward(8,v);

//v=1.5;

//wv=(v-.35)/.0075;

//left=wv;

//right=wv;

//setSpeed(left,right);

//backward(8,v);

}

void setSpeed(int leftVal,int rightVal){

analogWrite(ENA,leftVal);

analogWrite(ENB,rightVal);

}

void forward(float d, float v){

float t;

digitalWrite(IN1,HIGH);

digitalWrite(IN2,LOW);

digitalWrite(IN3,LOW);

digitalWrite(IN4,HIGH);

t=d/v*1000;

delay(t);

stopCar();

}

void backward(float d, float v){

float t;

digitalWrite(IN1,LOW);

digitalWrite(IN2,HIGH);

digitalWrite(IN3,HIGH);

digitalWrite(IN4,LOW);

t=d/v*1000;

delay(t);

stopCar();

}

void turnRight(int deg, int wv){

float t;

stopCar();

delay(100);

analogWrite(ENA,125);

analogWrite(ENB,125);

digitalWrite(IN1,HIGH);

digitalWrite(IN2,LOW);

digitalWrite(IN3,HIGH);

digitalWrite(IN4,LOW);

t=(deg+6)/136.29*1000.;

delay(t);

stopCar();

analogWrite(ENA,wv);

analogWrite(ENB,wv);

}

void turnLeft(int deg, int wv){

float t;

analogWrite(ENA,125);

analogWrite(ENB,125);

digitalWrite(IN1,LOW);

digitalWrite(IN2,HIGH);

digitalWrite(IN3,LOW);

digitalWrite(IN4,HIGH);

t=(deg+6)/136.29*1000.;

delay(t);

stopCar();

analogWrite(ENA,wv);

analogWrite(ENB,wv);

}

void stopCar(){

digitalWrite(IN1,LOW);

digitalWrite(IN2,LOW);

digitalWrite(IN3,LOW);

digitalWrite(IN4,LOW);

}

void calF(){

digitalWrite(IN1,HIGH);

digitalWrite(IN2,LOW);

digitalWrite(IN3,LOW);

digitalWrite(IN4,HIGH);

delay(5000);

stopCar();

}

void calB(){

digitalWrite(IN1,LOW);

digitalWrite(IN2,HIGH);

digitalWrite(IN3,HIGH);

digitalWrite(IN4,LOW);

delay(5000);

stopCar();

}

void calR(int wv){

stopCar();

analogWrite(ENA,125);

analogWrite(ENB,125);

digitalWrite(IN1,HIGH);

digitalWrite(IN2,LOW);

digitalWrite(IN3,HIGH);

digitalWrite(IN4,LOW);

delay(3000);

analogWrite(ENA,wv);

analogWrite(ENB,wv);

stopCar();

}

void calL(int wv){

analogWrite(ENA,125);

analogWrite(ENB,125);

digitalWrite(IN1,LOW);

digitalWrite(IN2,HIGH);

digitalWrite(IN3,LOW);

digitalWrite(IN4,HIGH);

delay(5000);

analogWrite(ENA,wv);

analogWrite(ENB,wv);

stopCar();

}

Elegoo Smart Car Tutorial

Robotics Training LESSON 10: Using the Infrared (IR) Remote to Control Robot

August 13, 2020 admin

In this lesson we show how to use the IR remote in the Elegoo Smart Car to send signals to the robot. The IR remote sends IR signals to the IR detector on the Electronic Shield sitting on top of the Smart Car. In this lesson we show how to install the IR library, and how to write code to send and detect IR signals. The code we develop in today’s lesson is included below for your convenience.

#include <IRremote.h>
int IRpin=12;
IRrecv IR(IRpin);
decode_results cmd;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
IR.enableIRIn();
IR.blink13(true);
}
void loop() {
  // put your main code here, to run repeatedly:
while (IR.decode(&cmd)==0) {
}
Serial.println(cmd.value,HEX);
delay(500);
IR.resume();

}

#include <IRremote.h>

int IRpin=12;

IRrecv IR(IRpin);

decode_results cmd;

void setup() {

// put your setup code here, to run once:

Serial.begin(9600);

IR.enableIRIn();

IR.blink13(true);

}

void loop() {

// put your main code here, to run repeatedly:

while (IR.decode(&cmd)==0) {

}

Serial.println(cmd.value,HEX);

delay(500);

IR.resume();

}

Technology Tutorials

Tag Archives: Elegoo

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Robotics Training LESSON 10: Using the Infrared (IR) Remote to Control Robot

Making The World a Better Place One High Tech Project at a Time. Enjoy!