#include <DHT.h>
#include <Servo.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include <Fonts/FreeSerif9pt7b.h>
#define dht_pin 2
#define led_merah 5
#define led_kuning 4
#define led_biru 3
#define servoPin 6
#define buzzerPin 7
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define DHTTYPE DHT22
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
DHT dht(dht_pin, DHTTYPE);
Servo myServo;
void setup() {
Serial.begin(115200);
dht.begin();
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
display.clearDisplay();
pinMode(buzzerPin, OUTPUT);
pinMode(led_merah, OUTPUT);
pinMode(led_kuning, OUTPUT);
pinMode(led_biru, OUTPUT);
myServo.attach(servoPin);
myServo.write(0);
}
void loop() {
delay(2000);
display.setFont(&FreeSerif9pt7b);
display.clearDisplay();
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0, 40);
float h = dht.readHumidity();
float suhu = dht.readTemperature();
float f = dht.readTemperature(true);
if (isnan(h) || isnan(suhu) || isnan(f)) {
return;
}
float hif = dht.computeHeatIndex(f, h);
float hic = dht.computeHeatIndex(suhu, h, false);
if (suhu < 29) {
digitalWrite(led_merah, LOW);
digitalWrite(led_kuning, LOW);
digitalWrite(led_biru, HIGH);
display.println("SUHU RENDAH");
display.display();
noTone(buzzerPin);
myServo.write(0);
} else if (suhu <= 35 && suhu >= 29) {
digitalWrite(led_merah, LOW);
digitalWrite(led_kuning, HIGH);
digitalWrite(led_biru, LOW);
display.println("SUHU CUKUP");
display.display();
noTone(buzzerPin);
myServo.write(0);
} else if (suhu > 35) {
digitalWrite(led_merah, HIGH);
digitalWrite(led_kuning, LOW);
digitalWrite(led_biru, LOW);
display.println("SUHU PANAS");
display.display();
tone(buzzerPin, 1000, 200); // Frekuensi 1000 Hz, durasi 200 ms
delay(100); // Jeda antara beep
noTone(buzzerPin);
myServo.write(90);
} else {
digitalWrite(led_merah, LOW);
digitalWrite(led_kuning, LOW);
digitalWrite(led_biru, LOW);
display.println(" ");
display.display();
noTone(buzzerPin);
myServo.write(0);
}
}