LigaRele

#define botao 2
#define rele 5
void setup()
{
  pinMode(botao, INPUT_PULLUP);
  pinMode(rele, OUTPUT);
}

void loop()
{
  if (digitalRead(botao == LOW))
  {
    delay(30);
  }
  if (digitalRead(botao == LOW))
  {
    digitalWrite(rele, !digitalRead(botao));
  }
}