When I plug it the board is resetting all the time, but the boot button helps to flash for the first time, so is not necessary a external programmer.

I uploaded the next code:

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(36, OUTPUT);
  Serial.begin(9600);
}

// the loop function runs over and over again forever
void loop() {
  Serial.println("asdf");
  digitalWrite(36, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(1000);                      // wait for a second
  digitalWrite(36, LOW);   // turn the LED off by making the voltage LOW
  delay(1000);                      // wait for a second
}

It works at expected :)