/* *************************************
*   Hub 007 - Ativar leds por comunicação serial com o Arduino
*   Autor: Angelo Luis Ferreira
*  30/09/2020
*   http://squids.com.br/arduino
*
*************************************** */

const byte ledRed = 13;
const byte ledYellow = 9;
const byte ledGreen = 6;

char letter;
boolean control = 0;
boolean state = 0;

void setup() {
  Serial.begin(9600); // incia a comunicação serial
  pinMode(ledRed, OUTPUT);
  pinMode(ledYellow, OUTPUT);
  pinMode(ledGreen, OUTPUT);
  Serial.println("Digite: ");
  Serial.println("A para piscar o led verde");
  Serial.println("B para piscar o led amarelo");
  Serial.println("C para acender ou apagar o led vermelho");
}

void loop() {
  if (Serial.available()) {
    letter = Serial.read();
    control = 0;
    Serial.print("Char recebido: ");
    Serial.println(letter);    
  } 
  
  // pisca led verde
  if (letter == 'A' && control == 0) {
    for (byte i=0;i<2;i++) {
    digitalWrite(ledGreen, HIGH);
      delay(1000); // Wait for 1000 millisecond(s)
      digitalWrite(ledGreen, LOW);
      delay(1000); // Wait for 1000 millisecond(s) 
    }
    control = 1;
  }
  
  // pisca led amarelo
  if (letter == 'B' && control == 0) {
    for (byte i=0;i<3;i++) {
    digitalWrite(ledYellow, HIGH);
      delay(1000); // Wait for 1000 millisecond(s)
      digitalWrite(ledYellow, LOW);
      delay(1000); // Wait for 1000 millisecond(s) 
    }
    control = 1;
  }
  
  // muda estado led vermelho
  if (letter == 'C' && control == 0) {
    state = !state;
    digitalWrite(ledRed, state);
    control = 1;
  }
  
}