//Written by: Abhishrant Majhi
//Check LiquidCrystal example for class name

#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2); //Change this variable according to example

int button1 = 6; //Button 1 to pin6
int button2 = 7; //Button 2 to pin7
int button1n = 8; //Button 1 to pin6
int button2n = 9; //Button 2 to pin7
int relay = 8; //Relay to pin8

boolean relayOn = false;

unsigned int onTime = 30000;   //How much time relay will be on (default = 30 seconds)
unsigned int offTime = 30000;   //How much time relay will be off (default = 30 seconds)
unsigned int tick = 0;

int debounce = 50;
int displayTime = 2000; //Change display every 2 seconds

void setup() {
	pinMode(6, INPUT);
	pinMode(7, INPUT);
	pinMode(8, OUTPUT);

	lcd.begin(16, 2); //Change according to example
}

void loop() {
	if(digitalRead(button1) == 0) { //If Button 1 pressed
		delay(debounce);
		if(digitalRead(button1) == 1) return;
		onTime+=60000; //Add 60 seconds to off Time
		displayOnTime();
	}

	if(digitalRead(button2) == 0) { //If Button 2 pressed
		delay(debounce);
		if(digitalRead(button2) == 1) return;
		offTime+=60000; //Add 60 seconds to on time
		displayOffTime();
	}

	if(digitalRead(button1n) == 0) { //If Button 1 Down pressed
		delay(debounce);
		if(digitalRead(button1n) == 1) return;
		onTime-=60000; //Subtract 60 seconds to off Time
		displayOnTime();
	}

	if(digitalRead(button2n) == 0) { //If Button 2 Down pressed
		delay(debounce);
		if(digitalRead(button2n) == 1) return;
		offTime-=60000; //Subtract 60 seconds to on time
		displayOffTime();
	}

	if(millis()-tick>=onTime && !relayOn) {
		digitalWrite(relay, HIGH);
		tick=millis();
		relayOn = true;
	}

	if(millis()-tick>=offTime && relayOn) {
		digitalWrite(relay, LOW);
		tick=millis();
		relayOn = false;
	}

	displayOnTime();
	delay(displayTime);
	displayOffTime();
	delay(displayTime);
}

void displayOnTime() {
	lcd.clear();
	lcd.noDisplay();
	lcd.print("On Time: ");
        lcd.print(onTime);
        lcd.print("ms");
	delay(250);
	lcd.display();
}

void displayOffTime() {
	lcd.clear();
	lcd.noDisplay();
        lcd.print("Off Time: ");
        lcd.print(offTime);
        lcd.print("ms");
	delay(250);
	lcd.display();
}