/*****
Proyek Arduino dengan Simulator Wokwi
Judul : Kipas Angin Otomatis dengan Sensor Suhu-Kelembaban.
Deskripsi : Kipas angin otomatis dg sensor suhu-kelembaban.
Kipas angin akan hidup jika suda terasa panas, 27C
Dimodifikasi oleh : Yosep Prasetya Budi
Terakhir diedit : 29-08-2024 10:28
*****/
#include "DHT.h"
#include <LiquidCrystal_I2C.h>
#define I2C_ADDR 0x27
#define LCD_COLUMNS 16
#define LCD_LINES 2
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);
#define DHTPIN 2 // Digital pin connected to the DHT sensor
// Feather HUZZAH ESP8266 note: use pins 3, 4, 5, 12, 13 or 14 --
// Pin 15 can work but DHT must be disconnected during program upload.
// Uncomment whatever type you're using!
//#define DHTTYPE DHT11 // DHT 11
#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
// Connect pin 1 (on the left) of the sensor to +5V
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
// to 3.3V instead of 5V!
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 4 (on the right) of the sensor to GROUND
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor
// Initialize DHT sensor.
// Note that older versions of this library took an optional third parameter to
// tweak the timings for faster processors. This parameter is no longer needed
// as the current DHT reading algorithm adjusts itself to work on faster procs.
DHT dht(DHTPIN, DHTTYPE);
//Relay pin
byte relayPin = 3;
//Saklar pin
byte pb1Pin = 9;
byte pb2Pin = 8;
int buttonStatePb0 = 0; // nama variable status saklar Pb0
int buttonStatePb1 = 0; // nama variable status saklar Pb1
int lastButtonStatePb1 = 0; // previous state of the button
int setPoint = 50 ; // 50 cm
void setup () {
Serial.begin(9600);
//IO
pinMode(relayPin, OUTPUT);
pinMode(pb1Pin, INPUT_PULLUP);
pinMode(pb2Pin, INPUT_PULLUP);
digitalWrite(relayPin, LOW);
digitalWrite(pb1Pin, HIGH);
digitalWrite(pb2Pin, HIGH);
// Init
lcd.init();
lcd.backlight();
// Print something
lcd.setCursor(3, 0);
lcd.print("Hello, world!");
lcd.setCursor(0, 1);
lcd.print("Wokwi Online IoT");
delay(1000);
lcd.setCursor(0, 1);
lcd.print(" Simulator ");
lcd.setCursor(0, 1);
delay(1000);
lcd.print(" Enjoy! ");
delay(2000);
dht.begin();
lcd.clear();
lcd.setCursor(1, 0);
lcd.print("KIPAS OTOMATIS");
lcd.setCursor(3, 1);
lcd.print("SYSTEM OFF");
}
void loop () {
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
float h = dht.readHumidity();
// Read temperature as Celsius (the default)
float t = dht.readTemperature();
// Read temperature as Fahrenheit (isFahrenheit = true
float f = dht.readTemperature(true);
// Check if any reads failed and exit early (to try again).
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println(F("Failed to read from DHT sensor!"));
return;
}
// membaca nilai saklar Pb0 dan Pb1 (sensor digital)
buttonStatePb0 = digitalRead(pb1Pin);
buttonStatePb1 = digitalRead(pb2Pin);
// Compute heat index in Fahrenheit (the default)
float hif = dht.computeHeatIndex(f, h);
// Compute heat index in Celsius (isFahreheit = false)
float hic = dht.computeHeatIndex(t, h, false);
Serial.print(F("Humidity: "));
Serial.print(h);
Serial.print(F("% Temperature: "));
Serial.print(t);
Serial.print(F("°C "));
Serial.print(F("Heat index: "));
Serial.print(hic);
Serial.println(F("°C "));
// kunci kondisi Pb1 jika ON
if(buttonStatePb1 == LOW) {
lastButtonStatePb1 = HIGH;
}
if (buttonStatePb0 == HIGH)
{
// check apakah tombol pushbutton ditekan
if (lastButtonStatePb1 == HIGH)
{
// start with a blank screen
lcd.setCursor(0, 0);
lcd.print("SUHU RUANG: ");
lcd.setCursor(11, 0);
lcd.print(t);
//lcd.print(t("°C"));
lcd.setCursor(0, 1);
lcd.print("KELEMBABAN:");
lcd.setCursor(11, 1);
lcd.print(h);
//lcd.print(h("%"));
if( t > 32) {
digitalWrite(relayPin, HIGH);
} else
{
digitalWrite(relayPin, LOW);
}
}
} else
{
//
lcd.clear(); //
lcd.setCursor(1, 0);
lcd.print("KIPAS OTOMATIS");
lcd.setCursor(3, 1);
lcd.print("SYSTEM OFF");
// matikan Relay (off)
digitalWrite(relayPin, LOW);
lastButtonStatePb1 = LOW;
}
delay(500);
}