openrc-f1-rainlight.ino

int           channel;              // channel value
const int     ledPin         = 0;   // Output pin for rearlight LED
const int     inputPin       = 1;   // Input signal from RC-receiver
int           ledState       = LOW; // Start with led off
unsigned long previousMillis = 0;   // will store last time LED was updated
int           interval       = 0;   // interval at which to blink default value

void setup() {
  pinMode(inputPin, INPUT);
  pinMode(ledPin,   OUTPUT);
}

void loop() {

  // Read value from input pin
  channel = pulseIn(inputPin, HIGH);

  if (channel == 0) { // Turn sender on, pulse 2sec
    interval = 2000;
    updateLED();
  }

  else if (channel > 1 && channel < 1500 && ledState == LOW) { // Throttle, keep LED on (no blinking)
    ledState = HIGH;
    digitalWrite(ledPin, ledState);
  }

  else if ( channel > 1500 ) {

    if (channel > 1600) { // Reverse, fast blinking
      interval = 100;
      updateLED();
      
    } else { // neutral 
      interval = 400;
      updateLED();
    }

  }

}

void updateLED() {
  
  unsigned long currentMillis = millis();
  
  if (currentMillis - previousMillis >= interval) {
    // save the last time you blinked the LED
    previousMillis = currentMillis;

    // if the LED is off turn it on and vice-versa:
    if (ledState == LOW) {
      ledState = HIGH;
    } else {
      ledState = LOW;
    }

    // set the LED with the ledState of the variable:
    digitalWrite(ledPin, ledState);
  }

}