// Semáforo
// Placa ESP: NodeMCU-32S
// Definições
int led_vm = 2;
int led_am = 4;
int led_vd = 5;
void setup() { 
 pinMode(led_vm, OUTPUT);
 pinMode(led_am, OUTPUT);
 pinMode(led_vd, OUTPUT);
 Serial.begin(115200); 
}
void loop() {
 digitalWrite(led_vd, HIGH); 
 Serial.println("SIGA"); 
 delay(3000); 
 digitalWrite(led_vd, LOW); 
 digitalWrite(led_am, HIGH);
 Serial.println("ATENÇÃO"); 
 delay(1000); 
 digitalWrite(led_am, LOW);
 digitalWrite(led_vm, HIGH);
 Serial.println("PARE"); 
 delay(3000);
 digitalWrite(led_vm, LOW); 
}