#include <IRremote.h>

const int RECV_PIN = 15;  // GPIO 15, matching your diagram
IRrecv irrecv(RECV_PIN);
decode_results results;

void setup() {
  Serial.begin(9600);
  Serial.println("IR Receiver Test");
  irrecv.enableIRIn();  // Start the receiver
}

void loop() {
  if (irrecv.decode()) {  // The new API does not require passing &results
    Serial.print("Received value: ");
    Serial.println(irrecv.decodedIRData.command, HEX);  // New API uses decodedIRData
    irrecv.resume();  // Receive the next value
  }
}