/*
  Fade and ReadAnalogVoltage to read the brightness of a led with a tsl257-lf photodetector amplifier
*/

int led = 9;           // the PWM pin the LED is attached to
int brightness = 0;    // how bright the LED is
int fadeAmount = 1;    // how many points to fade the LED by (original: 5)

// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
  pinMode(led, OUTPUT);
}

// the loop routine runs over and over again forever:
void loop() {
  
// read the input of the poti on analog pin 4, map it and give it to the led:
  int Poti = analogRead(A4);
  // map it to the range of the analog out:
  int Potimap = map(Poti, 0, 1023, 0, 255);
  // change the analog out value:
  analogWrite(A4, Potimap);

  // print the original Poti value to the Serial Monitor:
  Serial.print("Poti; ");
  Serial.print(Poti);

/*
// set the brightness of pin 9:

  analogWrite(led, brightness);
  Serial.print("brightness:");
  Serial.print(brightness);
  Serial.print("   "); 

*/

/*
  // change the brightness for next time through the loop:
  brightness = brightness + fadeAmount;

  // reverse the direction of the fading at the ends of the fade:
  if (brightness <= 0 || brightness >= 10) {  // (original: >= 255)
    fadeAmount = -fadeAmount;
  }
*/

  // wait for 30 milliseconds to see the dimming effect
  delay(300);
  
  // read the input of the OPT101 sensor on analog pin 2:
  int OPT101 = analogRead(A2);
  // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
  // float voltage = sensorValue * (5.0 / 1023.0);
  // print out the value you read:
  Serial.print(";  OPT101: ");
  Serial.println(OPT101);
}