🏠 Smart Home Control: Automate 16 Relays with ESP32

#include <WiFi.h>
#include <PubSubClient.h> // For MQTT control (optional)

const char* ssid = "YourWiFi";
const char* password = "YourPassword";

int relays[16] = {2, 4, 5, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 25, 26};

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nConnected to WiFi!");
  
  for (int i = 0; i < 16; i++) {
    pinMode(relays[i], OUTPUT);
    digitalWrite(relays[i], LOW); // Start OFF
  }
}

void loop() {
  // Example: toggle all relays one by one
  for (int i = 0; i < 16; i++) {
    digitalWrite(relays[i], HIGH);
    delay(500);
    digitalWrite(relays[i], LOW);
    delay(500);
  }
}