IRremote messing things up

Projects Programming
1

I am new to Arduino and wanted to start a little project to practice my Arduino abilities.
I wanted to use the IR remote library to switch between modes in my project, but for some reason when I added the IR remote feature It started messing things up, and things that weren't supposed to happen happened.

I know that all my coding is correct, because I have used the same IR concept and code in another project, and it worked completely fine. And when I remove the IR feature, everything works fine.

I did some testing to find the problem and try to fix it, after some time I finally found the issue, but I have no idea why it happens and how to fix it. When I remove ''IR.enableIRIn();'' it works fine (without being able to use remote), but when I add it, it messes things up.

If anyone knows what's wrong it would be a huge help if you could tell me or if you know any alternate way I could try. Thanks :slight_smile:

Edit:
I also did a test which you can see in the code, where I printed the variable ''mode'' and it was working as intended (Printing 1 when I press 1 and printing 2 when I press 2).

//Remote
#include <IRremote.h>
#define one 0xFFA25D
#define two 0xFF629D


int RECV_PIN=5;
int IRcode;
IRrecv IR(RECV_PIN);
decode_results results;

int mode;

//motor
int M10=10;
int M11=11;
int M9=9;
int M3=3;

//line follower
int IRLFHpin=12;
int IRLFVpin=8;
int IRLFHstate;
int IRLFVstate;

//obstacle avoider
int IROAHpin=7;
int IROAVpin=6;
int IROAHstate;
int IROAVstate;


void setup() {
//Remote
IR.enableIRIn(); //When I remove this the code works, but when I add it, it messes things up. Everything else works fine.
IR.blink13(true);

//motor
pinMode(M10, OUTPUT);
pinMode(M11, OUTPUT);
pinMode(M9, OUTPUT);
pinMode(M3, OUTPUT);

//line follower
pinMode(IRLFHpin, INPUT);
pinMode(IRLFVpin, INPUT);

//obstacle avoider
pinMode(IROAHpin, INPUT);
pinMode(IROAVpin, INPUT);

Serial.begin(9600);
}

void loop() {

//Remote
if(IR.decode(&results)){
  
  switch(results.value){

    case one: 
    mode=1; 
    break;

    case two:
    mode=2; 
    break;

  }
  Serial.print("Code & Mode: ");
  Serial.print(results.value, HEX );
  Serial.println(mode);
  IR.resume();
  delay(500);
  }

//obstacle avoider

if(mode==1){
 IROAHstate=digitalRead(IROAHpin);
 IROAVstate=digitalRead(IROAVpin);

 if(IROAVstate==false && IROAHstate==true){
 analogWrite(M10, 125);
 analogWrite(M11, 0);

 analogWrite(M9, 50);
 analogWrite(M3, 0);
 delay(500);
 }

 if(IROAVstate==true && IROAHstate==false){
 analogWrite(M10, 0);
 analogWrite(M11, 50);

 analogWrite(M9, 0);
 analogWrite(M3, 125);
 delay(500);
 }

 if(IROAVstate==true && IROAHstate==true){
 analogWrite(M10, 50);
 analogWrite(M11, 0);

 analogWrite(M9, 0);
 analogWrite(M3, 50);
 delay(500);
 }

 if(IROAVstate==false && IROAHstate==false){
 analogWrite(M10, 0);
 analogWrite(M11, 255);

 analogWrite(M9, 100);
 analogWrite(M3, 0);
 delay(500);
 }

}

//line follower

if(mode==2){

IRLFVstate=digitalRead(IRLFVpin);
IRLFHstate=digitalRead(IRLFHpin);

if(IRLFVstate==false && IRLFHstate==true){
analogWrite(M10, 255);
analogWrite(M11, 0);

analogWrite(M9, 0);
analogWrite(M3, 0);
}

if(IRLFVstate==true && IRLFHstate==false){
analogWrite(M10, 0);
analogWrite(M11, 0);

analogWrite(M9, 0);
analogWrite(M3, 255);
}

if(IRLFVstate==false && IRLFHstate==false){
analogWrite(M10, 30);
analogWrite(M11, 0);

analogWrite(M9, 0);
analogWrite(M3, 30);
}

if(IRLFVstate==true && IRLFHstate==true){
analogWrite(M10, 0);
analogWrite(M11, 0);

analogWrite(M9, 0);
analogWrite(M3, 0);
}

}

}
2

I think the problem is that IRRemote uses Timer1 so you can't use PWM (analogWrite()) on pins 9 or 10 (assuming Arduino UNO). Pick other pins for your motor control.

3

What version of the IRremote library are you using? The newest version (>3.0) does not use the decode_results struct. See the IRremote GitHub page.

Since the decoded values are now in IrReceiver.decodedIRData and not in results any more, remove the line decode_results results or similar.

5

As I said, I've used the exact same IR code in another project (with decode_results), and it worked completely fine. I also did a test which you can see in the code, where I printed the variable ''mode'' and it was working as intended (Printing 1 when I press 1 and printing 2 when I press 2)

6

It is pretty important for it to use analog pins.

7

I was merely pointing out what the documentation says.

Ignore the warnings if you want.

8

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