Using IR sensor with Arduino Mega 2560

Using Arduino Sensors
1

I am fairly new to Arduinos. I have an Aruino Mega 2560 (Amazon.com: KEYESTUDIO Mega 2560 R3 Board for Arduino Projects with USB Cable : Electronics). I bought a set of IR receivers and transmitters (Amazon.com: Gikfun Digital 38khz Ir Receiver Ir Transmitter Sensor Module Kit for Arduino (Pack of 3 sets) EK8477 : Electronics). For now I am just interested in using the receiver. I have a couple of IR remote controllers that I use for things like lights and a electronic fire place. I am using hte 5v on the board to power a receiver. This is my code (found How to Set Up an IR Remote and Receiver on an Arduino - Circuit Basics)

#include <IRremote.h>

const int RECV_PIN = 42;
IRrecv irrecv(RECV_PIN);
decode_results results;

void setup(){
  Serial.begin(9600);
  irrecv.enableIRIn();
  irrecv.blink13(true);
}

void loop(){
  if (irrecv.decode(&results)){
        Serial.println(results.value, HEX);
        irrecv.resume();
  }
}

I have tried various pins instead of 42.

When I press a button on a remote, then an led on the receiver module does light up. In the serial monitor on the computer I either get nothing, a zero (0), or a string of characters.

I have verified that the serial monitor is also set to the baud rate 9600.

What might I be doing wrong?

EDIT: I have doubled checked that group and 5v are connected right. I have tried different wires.

2

Why do you think you are doing something wrong? Your description seems perfectly normal.

3

I guess I was expecting the outputs to be like the website (How to Set Up an IR Remote and Receiver on an Arduino - Circuit Basics) describes. And I am not seeing that. Does that make sense?

4

They show more than one program listing. Which one are you using? Are your components 100% like the web site?

5

The program I used was the one I quoted above. So the code is

#include <IRremote.h>

const int RECV_PIN = 7;
IRrecv irrecv(RECV_PIN);
decode_results results;

void setup(){
  Serial.begin(9600);
  irrecv.enableIRIn();
  irrecv.blink13(true);
}

void loop(){
  if (irrecv.decode(&results)){
        Serial.println(results.value, HEX);
        irrecv.resume();
  }
}

The website says this should produce something like


Instead I am getting either (1) nothing, (2) a zero (0), or (3) a string of random characters.

My connections are like they show here

768×385 43.6 KB

The only difference is that I am using an Arduino Mega 2560. I am using pin 42 (since I assumed pin 7 being PWM wouldn't work).

Does this make sense?

6

Try this code at loop():

void loop() {
  if (IrReceiver.decode()) {
    Serial.println(IrReceiver.decodedIRData.decodedRawData, HEX);
    irrecv.resume();
  }
}
7

This seemed to do it. I am now getting something like what is shown. I am still getting a zero on a line and then the code below.

Thank you!

8

Complete code:
Simulated at :

#include <IRremote.h>

const int RECV_PIN = 42;
IRrecv irrecv(RECV_PIN);
decode_results results;

void setup() {
  Serial.begin(9600);
  irrecv.enableIRIn();
  irrecv.blink13(true);
}

void loop() {
  if (IrReceiver.decode()) {
    Serial.println(IrReceiver.decodedIRData.decodedRawData, HEX);
    irrecv.resume();
  }
}
9

Awesome. Thank you so much for this.