#include <Arduino.h>

#define LED_PIN 2  // LED interno do ESP32

void setup() {
  pinMode(LED_PIN, OUTPUT);
  Serial.begin(115200);
  Serial.println("ESP32 pronto!");
}

void loop() {
  if (Serial.available()) {
    String cmd = Serial.readStringUntil('\n');
    cmd.trim();
    if (cmd == "ON") {
      digitalWrite(LED_PIN, HIGH);
      Serial.println("LED ligado");
    } else if (cmd == "OFF") {
      digitalWrite(LED_PIN, LOW);
      Serial.println("LED desligado");
    }
  }