#include "DHT.h"

#define DHTPIN 4     
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  Serial.println(F("DHT22 example!"));

  dht.begin();
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Check if any reads failed and exit early (to try again).
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  Serial.print(F("Humidity: "));
  Serial.print(humidity);
  Serial.print(F("%  Temperature: "));
  Serial.print(temperature);
  Serial.println(F("°C "));

  // Wait a few seconds between measurements.
  delay(2000);
}

 
blynk app



#define BLYNK_TEMPLATE_ID "TMPL3i0awIZav"
#define BLYNK_TEMPLATE_NAME "home automation"
#define BLYNK_AUTH_TOKEN "zOddgUZSQouD2nqeWGpKccMmZAIjVLxF"

//**********BLYNK, library**************************************
#include <BlynkSimpleEsp32.h>

//**********BLYNK, ssid, pass, token****************************
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

//**********LED, pin yg digunakan*******************************
#define pin1LED 15
#define pin2LED 2
#define pin3LED 4
#define pin4LED 5

//**********BLYNK, mendapat input dr blynk lewat datastream V0**
BLYNK_WRITE(V0)
{
  int saklar1=param.asInt();
  digitalWrite(pin1LED, saklar1);
}
BLYNK_WRITE(V1)
{
  int saklar2=param.asInt();
  digitalWrite(pin2LED, saklar2);
}
BLYNK_WRITE(V2)
{
  int saklar3=param.asInt();
  digitalWrite(pin3LED, saklar3);
}
BLYNK_WRITE(V3)
{
  int saklar4=param.asInt();
  digitalWrite(pin4LED, saklar4);
}

//*********BLYNK, syncron data terakhir saat koneksi tersambung*
BLYNK_CONNECTED() { 
  Blynk.syncAll();
}


void setup() {
  //********LED, setting pin jadi output************************
  pinMode(pin1LED, OUTPUT);
  pinMode(pin2LED, OUTPUT);
  pinMode(pin3LED, OUTPUT);
  pinMode(pin4LED, OUTPUT);

  //********BLYNK, mulai koneksi ke blynk***********************
  Blynk.begin(auth, ssid, pass);
  
}

void loop() {
  //********BLYNK, menjalankan blynk****************************
  Blynk.run();
}


switch



const int button = 4;
void setup() {
  Serial.begin(115200);
  pinMode(button,INPUT);
  }
void loop() {
  int bs = digitalRead(button);
  Serial.print("value = ");
  Serial.println(bs);
  delay(500);
  }