====== ESP32 Fan control =====
Example of how to turn the fan on and off
<code>
#include <Arduino.h>
#define FAN_PIN 18

void setup() {
  pinMode(FAN_PIN, OUTPUT);
}
void loop() {
  digitalWrite(18, HIGH);
  delay(2500);
  digitalWrite(18, LOW);
  delay(5000);
}
</code>