#include <DHT.h>
#define DHT_Pin 15
#define led 25
#define led2 27
#define ldr_pin A12
#define DHTTYPE DHT22
DHT DHT_sensor(DHT_Pin, DHTTYPE);
float hum;
float temp;
int light;
const float GAMMA = 0.7;
const float RL10 = 33;
void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
DHT_sensor.begin();
pinMode(ldr_pin, INPUT);
pinMode(led, OUTPUT);
pinMode(led2, OUTPUT);
}
void loop() {
ldr();
delay(1000);
suhu();
delay(1000);
}
void suhu(){
hum = DHT_sensor.readHumidity();
temp = DHT_sensor.readTemperature();//read temperatur (°C)
if(hum > 50.0 && temp > 30.0){
digitalWrite(led, HIGH);
}
else{
digitalWrite(led, LOW);
}
Serial.print("Humidity: ");
Serial.print(hum);
Serial.print(" %,");
Serial.print("Temperature: ");
Serial.print(temp);
Serial.print(" °C");
Serial.println();
delay(1000);
}
void ldr(){
int light = analogRead(ldr_pin);
float voltage = light / 4096. * 3.3;
float resistance = 2000 * voltage / (1 - voltage / 3.3);
float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
Serial.print("Room: ");
if (lux > 50) {
digitalWrite(led2, HIGH);
Serial.print("Light! ");
} else {
digitalWrite(led2, LOW);
Serial.print("Dark ");
}
Serial.print("Lux: ");
Serial.println(lux);
delay(1000);
}