IR Led

Other Hardware LEDs and Multiplexing
1

Hi,

I have a project where I need to control a LED strip via IR.
What I have done so far is read the IR signals from the remote control using this code:

#include <IRremote.h>

const int RECV_PIN = 2;

IRrecv irrecv(RECV_PIN);

decode_results results;

void setup()
{
  Serial.begin(9600);
  irrecv.enableIRIn(); // Start the receiver
  irrecv.blink13(true);
}

void loop() {
  if (irrecv.decode(&results)) {
    if (results.decode_type == NEC) {
      Serial.print("NEC: ");
    } else if (results.decode_type == SONY) {
      Serial.print("SONY: ");
    } else if (results.decode_type == RC5) {
      Serial.print("RC5: ");
    } else if (results.decode_type == RC6) {
      Serial.print("RC6: ");
    } else if (results.decode_type == UNKNOWN) {
      Serial.print("UNKNOWN: ");
    }
    Serial.println(results.value, HEX);
    irrecv.resume(); // Receive the next value
  }
}

On the serial monitor I could clearly see input.
This is an example:

NEC: F7A857
NEC: FFFFFFFF
NEC: F7609F
NEC: FFFFFFFF
NEC: F750AF
NEC: FFFFFFFF

It looks like each time it received a code like NEC: F750AF
Then followed by NEC: FFFFFFFF

Initially I figured NEC: FFFFFFFF might just be an error.

So I tried sending the IR signal using:

#include <IRremote.h>

IRsend irsend;

void setup()
{
}

void loop() {
 for (int i = 0; i < 3; i++) {
 irsend.sendNEC(0xF750AF, 32);
 delay(40);
 }
 delay(5000); //5 second delay between each signal burst
}

But the LED strip didnt change colour.
Then I changed it a bit so it also sends the 0xFFFFFFFF

 for (int i = 0; i < 3; i++) {
 irsend.sendNEC(0xF750AF, 32);
 delay(10);
                irsend.sendNEC(0xFFFFFFFF, 32);
 delay(40);
 }

This is also not working.
I tried changing 32 bit to I think any possible number but it just wont change colour.
And yes, I know I revieved F750AF when I pressed the button for pink, so I changed the LED strip colour before sending it.

I am not quite new to this.
Any suggestions that may help ?

I am using a IR reciever and a IR Led that are on a small board.
I know the IR signal wire is going to the correct pin on the arduino.
I can see the IR LED flash when I look trough my phone's camera on it. (if that makes sense)

2

Solved

On my 2nd arduino (Wemos D1 R2) the IRremote wouldnt be installed.
Found the IRremoteESP8266 library and got it working.
Using 2 arduino's one to read the IR signal and one to send it asily debug the issue.

In the end I think I didnt try it without sending 0xFFFFFFFF at 32
Just sending only:

irsend.sendNEC(0xF750AF, 32);

worked just fine.

3

0xFFFFFFFF might indicate that it's a repeat of the previous code. In that case, if you keep one button pressed for a longer time (e.g. 10 seconds), you will e.g. get NEC: F7A857 followed by a long list of NEC: FFFFFFFF.

You can play with it if needed :slight_smile: