Hello, this is my first post in the forum and I am just starting out with arduino. I am following the Arduino Mega 2560 Tutorials pdf that was delivered with the Box.
Right now I want to do get the IR receiver to work but its not showing any output on the Serial monitor.
I am using an Arduino Mega 2560 R3 and the attached receiver and remote.
The basic sketch has the following code:
#include "IRremote.h"
#include "IR.h"
IRrecv irrecv(RECEIVER); // create instance of 'irrecv'
decode_results results; // create instance of 'decode_results'
void setup() {
Serial.begin(9600);
Serial.println("IR Receiver Button Decode");
irrecv.enableIRIn();
}
void loop()
{
int tmpValue;
if (irrecv.decode(&results)) // have we received an IR signal?
{
Serial.println(results.value);
}
irrecv.resume(); // receive the next value
}
The headers are loaded and working. I triple checked the wiring, but as there are only 3 pins there is not that much that can go wrong.
What is happening now is that when I point the remote towards the receiver and press any button the LED lights up as expected. If I keep the button pressed the LED keeps lighting up in a high frequency. But nothing happens on the serial monitor. If I add the following else statement behind the if statement above:
else{
Serial.print("Hello")
}
it keeps spamming hello, so I conclude that even though the LED lights whenever I press a button the the receiver still says its not getting a signal.
Can anyone help me here?
Your code will not compile so I fail to see how you got any results.
I fixed the code and tested it on my Mega, IR detector decoder and remote. Fixed code works fine. See the comments. Don't call irrecv.resume() unless there has been a code received.
#include "IRremote.h"
//#include "IR.h" // causes an error "not found" but you do not need this so bye bye. ********
const byte RECEIVER = 2; // RECEIVE not declared so added this *************************
IRrecv irrecv(RECEIVER); // create instance of 'irrecv'
decode_results results; // create instance of 'decode_results'
void setup() {
Serial.begin(9600);
Serial.println("IR Receiver Button Decode");
irrecv.enableIRIn();
}
void loop()
{
//int tmpValue; // not used
if (irrecv.decode(&results)) // have we received an IR signal?
{
Serial.println(results.value);
irrecv.resume(); // moved ****************************************
}
//irrecv.resume(); // receive the next value ** don't call in loop, call after key has been decoded. **
}
I guess I failed to mention that there is an IR.h header, with that it compiles fine. But I also tried out your code and I still have the same issue, the receiver blinks when I press a button but nothing appears on the serial monitor
I tried it again to do, after resetting my arduino and it worked! I only tried it with your code though but that suffices. Thank you for taking the time to read my problem and solve it 
Edit:
I played around with it a little more and I think it was due to the thing you commented in the code :
Serial.println(results.value);
irrecv.resume(); // moved ****************************************
}
//irrecv.resume(); // receive the next value ** don't call in loop, call after key has been decoded.
because as soon as I put the resume outside the if statement it doesnt work anymore. Good to know!