Method IRLedOff

src/IRSend.hpp:1416–1451

* Just switch the IR sending LED off to send an IR space * A space is "no output", so the PWM output is disabled. * This function may affect the state of feedback LED. */

 * This function may affect the state of feedback LED.
 */
void IRsend::IRLedOff() {
#if defined(SEND_PWM_BY_TIMER)
    disableSendPWMByTimer(); // Disable PWM output
#elif defined(USE_NO_SEND_PWM)
#  if defined(USE_OPEN_DRAIN_OUTPUT_FOR_SEND_PIN) && !defined(OUTPUT_OPEN_DRAIN)
    digitalWriteFast(sendPin, LOW); // prepare for all next active states.
    pinModeFast(sendPin, INPUT);// inactive state for open drain
#  elif defined(USE_ACTIVE_HIGH_OUTPUT_FOR_NO_SEND_PWM) || defined(USE_ACTIVE_HIGH_OUTPUT_FOR_SEND_PIN) // USE_ACTIVE_HIGH_OUTPUT_FOR_SEND_PIN is old and deprecated
    digitalWriteFast(sendPin, LOW); // Set output to inactive low.
#  else
    digitalWriteFast(sendPin, HIGH); // Set output to inactive high.
#  endif
#else
#  if defined(USE_OPEN_DRAIN_OUTPUT_FOR_SEND_PIN) || defined(USE_ACTIVE_LOW_OUTPUT_FOR_SEND_PIN)
#    if defined(USE_ACTIVE_LOW_OUTPUT_FOR_SEND_PIN) || defined(OUTPUT_OPEN_DRAIN)
    if (__builtin_constant_p(sendPin)) {
        digitalWriteFast(sendPin, HIGH); // set output to inactive high.
    } else {
        digitalWrite(sendPin, HIGH);
    }
#    else
    pinModeFast(sendPin, INPUT); // inactive state to mimic open drain
#    endif
#  else
    if (__builtin_constant_p(sendPin)) {
        digitalWriteFast(sendPin, LOW); // set output to active low.
    } else {
        digitalWrite(sendPin, LOW);
    }
#  endif
#endif

#if defined(LED_SEND_FEEDBACK_CODE)
    setFeedbackLED(false);
#endif
}

/**
 * Sends an IR space for the specified number of microseconds.