esp32-doit-dev-kit-v1-pinout.png_1200

#include "Arduino.h"
 
#define BUILT_LED 2
 
 
void setup()
{
  Serial.begin(115200);
 
  pinMode(BUILT_LED, OUTPUT);
  digitalWrite(BUILT_LED, LOW);
 
}
 
void loop()
{
 
  vTaskDelay(pdMS_TO_TICKS(10));
}

[env:esp32doit-devkit-v1]
platform = espressif32
board = esp32doit-devkit-v1
framework = arduino
monitor_speed = 115200