Smart Remote Controller (Ir Reciever)

//*************************************************************************
//  Ir Receive Ver2023.1.20
//  Arduino board : ESP32(Arduino core for the ESP32) by Espressif Systems ver 2.0.6
//  Written by IT-Taro
//***********************************************************************

const byte IR_R_PIN = 23;     // Remote control reception with GPI23

// Initial settings at startup
void setup() {
  Serial.begin(115200);
  Serial.println();
  Serial.println("IrRecvStart");
  pinMode(IR_R_PIN, INPUT);
}
// Repeat infrared reception process
void loop() {
  if ( irRecv () ) {          // Execute infrared reception processing
    Serial.println();
    Serial.println("RcvOK");  // Displayed when the signal is received normally
  } else {
    Serial.println();
    Serial.println("NoSig");  // Displayed when there is no signal for 30 seconds
  }
}

// Infrared reception (signal reception or processing for 15 seconds)）
bool irRecv () {
  // Define variables (local variables) used in the irRecv function
  unsigned short irCount = 0;   // Number of HIGH and LOW signals
  unsigned long lastt = 0;      // Hold previous elapsed time
  unsigned long deltt = 0;      // Difference time from previous one
  unsigned long sMilli;         // Start time of this process
  unsigned long sMicro;         // Processing start time
  unsigned long wMicro;         // wait start time
  bool rState = 1;              // Infrared receiver module status 0: LOW, 1: HIGH
  sMilli = millis();            // Get the current system time (get in milliseconds)
  // Infinite loop until specific condition (signal received or 15 seconds elapsed)
  while(1) {
    // Get start time to wait for Ir reception
    wMicro = micros();          // Get current system time (get in microseconds)
    // Waiting for reception of inverted signal
    while (digitalRead(IR_R_PIN) == rState) {
      // When 0.5 seconds or more have passed after starting to wait
      if (micros() - wMicro > 500000) {
        // After waiting for 0.5 seconds or more
        if ( irCount > 10 ) {
          return true;    // Successfully completed
        }
        // If there are not more than 10 0,1 signals, receive again from zero due to noise
        irCount = 0;
        delay(1); // For watchdog timer (must be reset within 3 seconds)
      }
      // After 15 seconds or more of processing, T.O.
      if ( millis() - sMilli > 15000 ) {
        return false;    // Ends after 15 seconds (no reception)
      }
    }
    // Get the current time and elapsed time at the start of signal reception
    if ( irCount == 0 ) {
      sMicro = micros();
      lastt = 0;
      irCount++;
      Serial.println("ir:");
    // Processing after starting signal reception processing (irCount is 1 or more)
    } else {
      // Calculate the elapsed time from the time when the status change of the infrared receiver last changed
      deltt = ( (micros() - sMicro)/ 10 ) - lastt;
      // Save the last changed elapsed time for the next elapsed time calculation
      lastt = lastt + deltt;
      irCount++;
      Serial.print(deltt);
      Serial.print(",");
    }
    // Change the value to detect state change in While next time
    rState = !rState;
  }
}