ESP-32S Wifi Bluetooth Module - control GPIO to blink LED, using Arduino core for the ESP32

This example show how to modify the most basic Blink example, run on ESP-32S Wifi Bluetooth Module using Arduino core for the ESP32, control GPIO to toggle external LED.


Connection:
The GPIO 21 is used in this example.

(Fritzing part of Node32s is used here)

ESP32Blink.ino

int LED = 21;

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(LED, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(100);                       // wait for a second
  digitalWrite(LED, LOW);    // turn the LED off by making the voltage LOW
  delay(100);                       // wait for a second
}