#include <LiquidCrystal_I2C.h>
liquidCrystal_I2C lcd(0x27,20,4);
//Name ADC Channel
int Pot1;
float Pot1_volt;

// Name LED Channel
int LED1 = 21;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, Muhamad Budi Setiawan");
  pinMode(LED1, OUTPUT);
}



void loop() {
// put your main code here, to run repeatedly:
Pot1 = analogRead(34);
Pot1_volt = (float) Pot1 * 5.0 / 4095 ; // use 10 bit & Vref 5 Volt
Serial.print("nilai ADC: ");
Serial.print(Pot1);//menunjukan nilai ADC
Serial.print("\t");
Serial.print("nilai ADC Tegangan:  ");
Serial.println(Pot1_volt);//show voltage ADC
  delay(300); // this speeds up the simulation

  alarm(Pot1_volt, LED1, 1000,1000, 500,500, 200,200);
}

void blink(int channel, int on, int off){
  digitalWrite(channel, LOW);
  delay(on);
  digitalWrite(channel, HIGH);
  delay(off);
}


void alarm( float ch_adc, int ch_led,int safe_on, int safe_off, int warning_on, int warning_off, int danger_on, int danger_off)
{
if(ch_adc <=2.0){
  blink(ch_led, safe_on, safe_off);
}
if(ch_adc <=3.5){
  blink(ch_led, warning_on, warning_off);
}
if(ch_adc <=5.0){
  blink(ch_led, danger_on, danger_off);
}
}

void loop(){
  lcd.init();
  lcd.backlight();
  lcd.home();
  lcd.print("TUGAS MUHAMAD BUDI SETIAWAN");
  delay(20);
}