Simple arduino code to handle pwm and drive rc car headlights (LEDs) from a receiver (power and signal)

rc-car-highbeams.c

      /*
  Blink
  Turns on an LED on for one second, then off for one second, repeatedly.
 
  This example code is in the public domain.

  To upload to your Gemma or Trinket:
  1) Select the proper board from the Tools->Board Menu
  2) Select USBtinyISP from the Tools->Programmer
  3) Plug in the Gemma/Trinket, make sure you see the green LED lit
  4) For windows, install the USBtiny drivers
  5) Press the button on the Gemma/Trinket - verify you see
     the red LED pulse. This means it is ready to receive data
  6) Click the upload button above within 10 seconds
*/

 
byte PWM_PIN = 3;
const int ledPin = 13; 
const int headLights = 6; 
const int lowBeams = 60;
const int highBeams = 255;
int rxval;
 
void setup() {
  pinMode(PWM_PIN, INPUT);
  pinMode(ledPin, OUTPUT);
//  Serial.begin(115200);
}
 
void loop() {
  rxval = pulseIn(PWM_PIN, HIGH);
//  Serial.println(rxval);
      
if (rxval >= 990 && rxval <= 1450)
  {
    //low value
    analogWrite(headLights, LOW);
    digitalWrite(ledPin, LOW);
  }
else if (rxval >= 1451 && rxval <= 1850)
  {
    //medium value (middle)
    analogWrite(headLights, lowBeams);
    digitalWrite(ledPin, HIGH);
  }
else if (rxval >= 1851 && rxval <= 2250)
  {
    //high value
    analogWrite(headLights, highBeams);
    digitalWrite(ledPin, HIGH);
  }
else
  {
    digitalWrite(ledPin, LOW);
  }

  delay(100);
              
}