#include <CD74HC4067.h>
#include <DHT.h>

#define DHTTYPE DHT22

// Define pins for multiplexer
const int S0 = 12;
const int S1 = 13;
const int S2 = 14;
const int S3 = 15;
const int SIG_PIN = 4; // Common signal pin connected to ESP32

// Multiplexer object
CD74HC4067 mux(S0, S1, S2, S3);

// DHT object (use same pin for all, as the multiplexer will switch the signal)
DHT dht(SIG_PIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  dht.begin();
}

void loop() {
  for (int channel = 0; channel < 3; channel++) { // Adjust the loop to the number of sensors
    mux.channel(channel); // Select the correct channel
    delay(200);           // Small delay to allow switching
    
    // Reading DHT22 sensor
    float temperature = dht.readTemperature();
    float humidity = dht.readHumidity();

    // Check if readings are valid
    if (isnan(temperature) || isnan(humidity)) {
      Serial.print("Failed to read from DHT sensor on channel ");
      Serial.println(channel);
    } else {
      Serial.print("Sensor ");
      Serial.print(channel);
      Serial.print(" - Temp: ");
      Serial.print(temperature);
      Serial.print(" °C, Humidity: ");
      Serial.print(humidity);
      Serial.println(" %");
    }

    delay(2000);  // Wait between readings
  }
}