Integer Increment IRrec

Projects Programming
1

Hey Arduino Community! I have an IR receiver that when I press the Vol+ on my remote I want it to increase the integer by 1 and when I press the Vol- it decreases the integer by 1. It seemed simple enough to implement with ++int and --int, but I have run into a couple of problems.

Here is my code so far:

//10EF01FE = VOL+
//10EF718E = VOL-
//10EFC13E = CH+(VOL +10
//10EF619E = CH-(VOL -10)
//10EF3BC4 = EXIT(MUTE)

#include <IRremote.h>
#include <SPI.h>
int RECV_PIN = 2;
int i = 0;
IRrecv irrecv(RECV_PIN);

decode_results results;

void setup()
{
Serial.begin(9600);
Serial.println("Enabling IRin");
irrecv.enableIRIn(); // Start the receiver
Serial.println("Enabled IRin");
SPI.begin();

}

void loop() {
if (irrecv.decode(&results)) {
//Serial.println(results.value, HEX);
if (results.value==0x210EF01FE) {
++i;
Serial.println(i);
}
else (results.value==0x210EF718E);
{
--i;
Serial.println(i);
}
irrecv.resume(); // Receive the next value
}
delay(100);
}

So here are my 2 problems.

  1. When I press ANY button on my remote it changes the value of i.

  2. The value of i always counts down into the negative values.

And once I get this problem fixed, I want to increase/decrease the value by 10 using two other buttons.

HELP!!!

And Much Thanks in advance!

2 
if (results.value==0x210EF01FE) {
      ++i;
      Serial.println(i);
    }
    else (results.value==0x210EF718E);

Mucho oops

Please remember to use code tags when posting code

3

Sorry, this is my first time programming anything, and being on this forum.

What are code tags?

5 
if (results.value==0x210EF01FE) {
      ++i;
      Serial.println(i);
}
if (results.value==0x210EF718E) {
      --i;
      Serial.println(i);
}

Those are code tags

7 
//10EF01FE = VOL+
//10EF718E = VOL-

    results.value==0x210EF01FE
    results.value==0x210EF718E
                     ^ 
                    ???

What are those twos doing there? Those comparisons will never be true.

8

Ah, I do see the difference in the reference, and in your post AWOL.

Thanks you guys!

So what it looks like is I don't HAVE to put an else statement when using an if. I can just keep using if statements for all my functions. Conditions can only be used with if and else if, not with else.

Am I correct in my thinking?

oqibidipo - those HEX comparisons are if statements. If the hex code from the IR receiver matches 0x210EF01FE then increment int i by 1. If the hex code from the IR receiver matches 0x210EF718E then decrease int i by 1.

10

ok thanks! so using else if makes the code more efficient?

11

I would like some clarification to oqibidipo question. I only figured it out from an example, but don't really understand the reasoning behind it. I know that I have to add 0x2 before a hexadecimal value for the program to read the hex value, but what is really going on behind the scene?

12

agrogers15:
I would like some clarification to oqibidipo question. I only figured it out from an example, but don't really understand the reasoning behind it. I know that I have to add 0x2 before a hexadecimal value for the program to read the hex value, but what is really going on behind the scene?

Not 0x2, just 0x.

13

AH! that might be part of my problem...

THANKS!!