#include <LiquidCrystal_I2C.h>

// LCD-paneelin muuttujat
LiquidCrystal_I2C ledpanel(0x27,16,2);

// RGB-ledin logiikka
const int pinR = 6;
const int pinG = 5;
const int pinB = 3;

// slide-potentiometrien logiikka
const int potR = A1;
const int potG = A2;
const int potB = A3;

int readPot(int pin) {
  return map(analogRead(pin), 0, 1023, 0, 255);
}

// etäisyysmittarin logiikka
float cm;

long readUltrasonicDistance(int triggerPin, int echoPin)
{
	pinMode(triggerPin, OUTPUT);
	digitalWrite(triggerPin, LOW);
	delayMicroseconds(2);
	digitalWrite(triggerPin, HIGH);
	delayMicroseconds(10);
	digitalWrite(triggerPin, LOW);
	pinMode(echoPin, INPUT);
	return pulseIn(echoPin, HIGH);
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);

  ledpanel.init();
  ledpanel.backlight();
	ledpanel.setCursor(5,0);
  ledpanel.print("Mitta:");
	}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println("Suoritus käynnissä!");

  cm = 0.0344/2 * readUltrasonicDistance(9, 2);
	ledpanel.setCursor(11,1);
	ledpanel.print("cm");
	ledpanel.setCursor(5,1);
	ledpanel.print(cm, 1);
	delay(100);

  analogWrite(pinR, readPot(potR));
  analogWrite(pinG, readPot(potG));
  analogWrite(pinB, readPot(potB));
}