Multiple IR Sensors on separate receiving pin

[sergiomian]

Good morning, I need to connect two or more separated sensors on my ESP32, and discriminate which sensor receives the IR signal from the transmitter. Someone know if it's possible?

Thank in advance.

[crankyoldgit]

No. Not with this library as it stands. See the FAQ on the matter.

[sergiomian]

I understand, anyone know if exist a library that is compliant with my requirements?
Thanks for your support.

[crankyoldgit]

Not off the top of my head, but try https://github.com/Arduino-IRremote/Arduino-IRremote#quick-comparison-of-4-arduino-ir-receiving-libraries for some possibilities.

[pwbrophy]

@sergiomian I'm trying to do the same thing, did you ever figure it out?

[sergiomian]

No, unfortunately I was not able to do that. I hope that someone will fix it.

[pwbrophy]

I'm not sure if this will help anyone else, but I did manage to solve my problem in the end. I realised that I don't actually need any library at all. I thought that I needed to be able to send and receive codes for it to work. However, as I'm just using my LEDs for 'dumb' aiming and shooting I don't need to send codes. The sensors will trigger if you hit them with the correct wavelength of light (940NM) flashing at the correct frequency (38000hz).

So all you need to do is use 'tone' to turn on the LED:

tone(ir_transmitter_pin), 38000);

And then to detect a hit you just test if the receiver pin is low.

if (digitalRead(ir_receiver_pin) == LOW)

Beware though, if you use GPIO4 on an ESP32-CAM it also flashes the onboard LED. I found, after much head scratching, that this LED also produces the infrared frequency that the sensors pick up and it will trigger any IR receivers in range.

[vkvark]

Come on, it's easy:

#include <Arduino.h>
#include <IRremoteESP8266.h>
#include <IRrecv.h>
#include <IRutils.h>

uint32_t IRdata1 = 0;
uint32_t IRdata2 = 0;

#define IRpin1 14                                    
#define IRpin2 2

IRrecv IRrecv1(IRpin1);
IRrecv IRrecv2(IRpin2);

decode_results results1;
decode_results results2;

void setup() {  
  Serial.begin(115200);
  delay(1000);  
  IRrecv1.enableIRIn();  
  IRrecv2.enableIRIn();       
}

void loop() {   

  if (IRrecv1.decode(&results1))
  {    
    IRdata1 = results1.value;
    Serial.print("IR data 1: ");
    Serial.println(IRdata1);        
    IRrecv1.resume();  
  }

  if (IRrecv2.decode(&results2)) 
  {    
    Serial.print("IR data 2: ");
    IRdata2 = results2.value;
    Serial.println(IRdata2);    
    IRrecv2.resume();  
  }  
}

[crankyoldgit]

I hate to tell you, that doesn't work the way you probably think it does.
See:
https://github.com/crankyoldgit/IRremoteESP8266/wiki/Frequently-Asked-Questions#does-this-library-support-multiple-distinct-ir-capture-sources

There is only one capture buffer shared between those two IRrecv objects, and only one end timer (timeout timer).
The library simply isn't designed (due to SRAM memory contrains) to handle simultaneous message reception.

[vkvark]

I hate to tell you, that doesn't work the way you probably think it does. See: https://github.com/crankyoldgit/IRremoteESP8266/wiki/Frequently-Asked-Questions#does-this-library-support-multiple-distinct-ir-capture-sources

There is only one capture buffer shared between those two IRrecv objects, and only one end timer (timeout timer). The library simply isn't designed (due to SRAM memory contrains) to handle simultaneous message reception.

Thanks for the explanation.

[Muskanjhawar]

Hey,
anyone found any way for ir receiver on multiple data pins.

[NiKiZe]

Did you read #1789 (reply in thread) ?

Keeping several buffers active and dealing with that complexity in the interupt handler is no easy task.