Experiencing problems with your Elegoo Smart Car 2 and IR remote control? Many hobbyists and students diving into Arduino coding and robotics projects with the Elegoo Smart Car 2 kit encounter initial hurdles. One common issue is getting all aspects of the car to function correctly, especially motor control when using IR remotes. If you’re facing a challenge where only the left wheels of your Elegoo Smart Car 2 respond to your IR remote commands while the right wheels remain unresponsive, you’re not alone. Let’s explore how to approach this coding challenge.
It appears you’ve already made significant progress by utilizing libraries and online code examples, identifying that your left wheels operate as expected – moving forward, backward, and left. This isolates the problem to the right wheel motor control. You’ve also wisely checked the motor itself and confirmed it’s functional through an auto-go test, which is excellent troubleshooting. The issue likely lies within the code logic that directs signals to the right side motors when triggered by your IR remote.
Let’s examine the provided code snippet to pinpoint potential areas for review in your Elegoo Smart Car 2 Coding setup:
#include <IRremote.h>
#define F 16736925
#define B 16754775
#define L 16720605
#define R 16761405
#define S 16712445
#define UNKNOWN_F 5316027
#define UNKNOWN_B 2747854299
#define UNKNOWN_L 1386468383
#define UNKNOWN_R 553536955
#define UNKNOWN_S 3622325019
int RECV_PIN = 12;
int in1=6;
int in2=7;
int in3=8;
int in4=9;
int ENA=5;
int ENB=11;
int ABS=250;
IRrecv irrecv(RECV_PIN);
decode_results results;
unsigned long val;
void _mForward() {
analogWrite(ENA,ABS);
analogWrite(ENB,ABS);
digitalWrite(in1,HIGH);//digital output
digitalWrite(in2,LOW);
digitalWrite(in3,HIGH);
digitalWrite(in4,HIGH);
Serial.println("go forward!");
}
void _mBack() {
analogWrite(ENA,ABS);
analogWrite(ENB,ABS);
digitalWrite(in1,LOW);
digitalWrite(in2,HIGH);
digitalWrite(in3,LOW);
digitalWrite(in4,HIGH);
Serial.println("go back!");
}
void _mleft() {
analogWrite(ENA,ABS);
analogWrite(ENB,ABS);
digitalWrite(in1,HIGH);
digitalWrite(in2,LOW);
digitalWrite(in3,HIGH);
digitalWrite(in4,LOW);
Serial.println("go left!");
}
void _mright() {
analogWrite(ENA,ABS);
analogWrite(ENB,ABS);
digitalWrite(in1,LOW);
digitalWrite(in2,HIGH);
digitalWrite(in3,LOW);
digitalWrite(in4,HIGH);
Serial.println("go right!");
}
void _mStop() {
digitalWrite(ENA,LOW);
digitalWrite(ENB,LOW);
Serial.println("STOP!");
}
void setup() {
pinMode(in1,OUTPUT);
pinMode(in2,OUTPUT);
pinMode(in3,OUTPUT);
pinMode(in4,OUTPUT);
pinMode(ENA,OUTPUT);
pinMode(ENB,OUTPUT);
_mStop();
irrecv.enableIRIn();
Serial.begin(9600);
}
void loop() {
if (irrecv.decode(&results)){
val = results.value;
Serial.println(val);
irrecv.resume();
switch(val){
case F:
case UNKNOWN_F:
_mForward();break;
case B:
case UNKNOWN_B:
_mBack(); break;
case L:
case UNKNOWN_L:
_mleft(); break;
case R:
case UNKNOWN_R:
_mright();break;
case S:
case UNKNOWN_S:
_mStop(); break;
default:break;
}
}
}Reviewing the _mright() function and the motor control logic is crucial. In the provided code, the _mright() function appears to be incorrectly defined. It’s currently identical to _mBack(), which would explain why the right motors aren’t behaving as expected when you intend to turn right. For a right turn, typically, one set of wheels should move forward while the other set either stops or moves backward, depending on the desired turning radius.
To rectify this in your Elegoo smart car 2 coding, you’ll need to adjust the _mright() function to correctly control the motors for a right turn. Examine your motor driver wiring to ensure in1, in2 control one side of the car and in3, in4 the other. Then, modify _mright() to activate the correct pin combinations for turning right. For instance, you might want to try something like making the left wheels move forward while the right wheels stop or even move backward to initiate a right turn.
Debugging motor control issues in Elegoo Smart Car 2 projects often involves careful examination of both the wiring and the code logic. Ensure that the pin assignments in your code (in1, in2, in3, in4, ENA, ENB) match your physical wiring connections to the motor driver. Double-check the logic within your motor control functions (_mForward, _mBack, _mleft, _mright, _mStop) to ensure they are sending the appropriate signals to each motor for the intended movements. By methodically reviewing these elements of your Elegoo smart car 2 coding project, you’ll likely pinpoint the cause and get your robot car moving correctly with IR control.
