Halo semuanya, kembali lagi denan admin disini, pada kesempatan kali ini admin akan memberikan sefruit tutorial membuat alarm udara di Arduino Uno
Alat yang kalian perlu persiapkan adalah aplikasi yang mensupport arduino uno seperti Arduino IDE, atau kalian bisa coding online di wokwi
nahhh, berikut adalah code yang bisa kalian coba untuk membuat alarm kalian sendiri, kalian juga bisa memodifikasi sesuai kebutuhan kalian
Adafruit_LiquidCrystal lcd(0);
unsigned long previousMillis = 0;
const long interval = 1000;
//PIN MERAH=7
//PIN KUNING=5,9
//PIN HIJAU= 3,11
void setup()
{
Serial.begin(9600);
pinMode(3, OUTPUT);
pinMode(5, OUTPUT);
pinMode(7, OUTPUT);
pinMode(9, OUTPUT);
pinMode(11, OUTPUT);
lcd.begin(16,2);
lcd.setCursor(0,0);
lcd.print("SENSOR KUALITAS");
lcd.setCursor(0,1);
lcd.print(" UDARA");
delay(2000);
lcd.clear();
}
void loop()
{
String message;
long frequency;
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval) {
previousMillis = currentMillis;
float tegangan, input;
input = (analogRead(A0) - 20) * 3.04;
tegangan = input* 5/1024;
lcd.clear();
int value = map(analogRead(A0), 0, 1023, 0, 1000);
int activeLedIndex;
if (value <=266) {
digitalWrite(3, LOW);
digitalWrite(5, LOW);
digitalWrite(7, LOW);
digitalWrite(9, LOW);
digitalWrite(11, HIGH);
lcd.setCursor(0,0);
lcd.print("Udara");
lcd.setCursor(0,1);
lcd.print("sangat bersih");
}
else if (value <=301) {
digitalWrite(3, HIGH);
digitalWrite(5, LOW);
digitalWrite(7, LOW);
digitalWrite(9, LOW);
digitalWrite(11, HIGH);
lcd.setCursor(0,0);
lcd.print("Udara");
lcd.setCursor(0,1);
lcd.print("bersih");
}
else if (value <=365) {
digitalWrite(3, HIGH);
digitalWrite(5, HIGH);
digitalWrite(7, LOW);
digitalWrite(9, LOW);
digitalWrite(11, HIGH);
lcd.setCursor(0,0);
lcd.print("Udara");
lcd.setCursor(0,1);
lcd.print("Kotor");
}
else if (value <=443) {
digitalWrite(3, HIGH);
digitalWrite(5, HIGH);
digitalWrite(7, LOW);
digitalWrite(9, HIGH);
digitalWrite(11, HIGH);
lcd.setCursor(0,0);
lcd.print("Udara");
lcd.setCursor(0,1);
lcd.print("Sangat kotor");
}
else {
digitalWrite(3, HIGH);
digitalWrite(5, HIGH);
digitalWrite(7, HIGH);
digitalWrite(9, HIGH);
digitalWrite(11, HIGH);
lcd.setCursor(0,0);
lcd.print("Udara");
lcd.setCursor(0,1);
lcd.print("Terpolusi");
}
Serial.print("value gas: ");
Serial.println(value);
}
}