#include <IRremote.h>
#define LED1 8
#define RELAY 9

const long RECV_PIN = 7;
IRrecv irrecv(RECV_PIN);
unsigned long nowTime;
unsigned long considerTime;

void setup(){
	Serial.begin(9600);
	IrReceiver.begin(RECV_PIN, ENABLE_LED_FEEDBACK);
	pinMode(LED1, OUTPUT);
	pinMode(RELAY, OUTPUT);
}

void loop(){
	nowTime = millis();

	if(IrReceiver.decode()){
		String irNum = String(IrReceiver.decodedIRData.command,HEX);
		Serial.println(irNum);
		Serial.println(nowTime);
		
		if(irNum=="c"){
			Serial.println("You pressed 1");			
			considerTime=0;
			onlight();
		}else if(irNum=="18"){
			Serial.println("You pressed 2");
			offlight();
		}else if(irNum=="5e"){
			Serial.println("You pressed 3");
			considerTime=nowTime + 10000;
			onlight();
		}else if(irNum=="8"){
			Serial.println("You pressed 4");
		}else{
			Serial.println("You pressed other key");
		}

		IrReceiver.resume();
	}

	if(considerTime==nowTime){
		digitalWrite(LED1, LOW);
		digitalWrite(RELAY, HIGH);
	}
}

void offlight(){
	digitalWrite(LED1, LOW);
	digitalWrite(RELAY, HIGH);
}

void onlight(){
	digitalWrite(LED1, HIGH);
	digitalWrite(RELAY, LOW);
}