analog-digital-dimmer.ino

const int pot = A0; // potentiometer
const int led = D8;

int potValue = 0;
long timestamp;

void setup () {
  Serial.begin(9600);
  Serial.println("Initializing...");  
  timestamp = millis();
}

void loop () {
  // instead of using delay, check every 20 milliseconds
  if (millis() - timestamp >= 20) {
    potValue = analogRead(pot);  
    
    Serial.print("Potentiometer value: ");
    Serial.println(potValue);

    analogWrite(led, potValue); // send potentiometer value to led
    timestamp = millis();
  }  
}

analog-digital.ino

const int pot = A0; // potentiometer
int potValue = 0;

void setup () {
  Serial.begin(9600);
  Serial.println("Initializing...");  
}

void loop () {
  potValue = analogRead(pot);

  Serial.print("Potentiometer value: ");
  Serial.println(potValue);
  delay(2000);
  
}

dimmer-oscillating.ino

const int pot = A0; // potentiometer
const int led = D8;

int potValue = 0;
long timestamp;

void setup () {
  Serial.begin(9600);
  Serial.println("Initializing...");  
  timestamp = millis();
}

void loop () {
  // instead of using delay, check every 20 milliseconds
  if (millis() - timestamp >= 20) {
    potValue = analogRead(pot);  
    
    Serial.print("Potentiometer value: ");
    Serial.println(potValue);

    analogWrite(led, potValue); // send potentiometer value to led
    delay(300);
    digitalWrite(led, LOW);
    delay(300);
    timestamp = millis();
  }  
}

prueba1.ino

int led = D6; // D6 es donde conectamos el led
// OUTPUT es un int que ya esta definido en arduino
// HIGH es un int que significa 1, LOW, 0

void setup() {
  // put your setup code here, to run once:
  pinMode(led, OUTPUT);

  
  //digitalWrite(led, HIGH);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(led, HIGH);
  delay(1000);
  digitalWrite(led, LOW);
  delay(1000);
}

prueba2-1.ino

int buttonState = 0;
int button = D1;
int led = D6;

void setup() {
  pinMode(led, OUTPUT);
  pinMode(button, INPUT); // boton en D1 es input
  digitalWrite(led, LOW); // led apagado al comienzo
}

void loop() {
  buttonState = digitalRead(button);
  if (buttonState == HIGH) { // cuando apretas el boton que parpadee
    digitalWrite(led, HIGH);
    delay(500);
    digitalWrite(led, LOW);
    delay(500);

  } else {
    digitalWrite(led, LOW);
  }
}

prueba2-b.ino

int buttonState = 0;
int button = D1;
int led = D6;

void setup() {
  pinMode(led, OUTPUT);
  pinMode(button, INPUT); // boton en D1 es input
  digitalWrite(led, LOW); // led apagado al comienzo
}

void loop() {
  buttonState = digitalRead(button);
  digitalWrite(led, buttonState);
}

prueba2.ino

int buttonState = 0;
int button = D1;
int led = D6;

void setup() {
  pinMode(led, OUTPUT);
  pinMode(button, INPUT); // boton en D1 es input
  digitalWrite(led, LOW); // led apagado al comienzo
}

void loop() {
  buttonState = digitalRead(button);
  if (buttonState == HIGH) {
    digitalWrite(led, HIGH);
  } else {
    digitalWrite(led, LOW);
  }
}

prueba3.ino

// state initialization
int buttonState = 0;
int ledState = 0;
int state = 0;

// pin references
int button = D1;
int led = D6;

void setup() {
  // Serial object receives transfer rate as constructor parameter, traditionally 9600 bps
  Serial.begin(9600);
  Serial.println("Initializing...");

  Serial.println("Setting I/O pin modes...");
  pinMode(led, OUTPUT);
  pinMode(button, INPUT);

  Serial.println("Setting initial LED state to 0...");
  digitalWrite(led, 0);
}

void loop() {
  buttonState = digitalRead(button);
  if (buttonState == 1) {
    state = 1;  
  } else {
    if (state == 1) {
      Serial.print("Changing led state to ");
      state = 0;
      if (ledState == 1) {
        digitalWrite(led, 0);
        ledState = 0;
        Serial.println("0...");
      } else {
        digitalWrite(led, 1);
        ledState = 1;
        Serial.println("1...");  
      }
    }  
  }
}