#include <ArduinoJson.h>
const int LED = 4;  // Define LED pin as GPIO 2

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  pinMode(LED, OUTPUT);  // Set LED pin as output
}

void loop() {
  // Blink pattern
  digitalWrite(LED, HIGH);  // Turn on LED
  delay(100);                // Wait for 100 milliseconds
  digitalWrite(LED, LOW);   // Turn off LED
  delay(100);                // Wait for 100 milliseconds
  digitalWrite(LED, HIGH);  // Turn on LED
  delay(100);                // Wait for 100 milliseconds
  digitalWrite(LED, LOW);   // Turn off LED
  delay(100);                // Wait for 100 milliseconds
  digitalWrite(LED, HIGH);  // Turn on LED
  delay(1000);               // Wait for 1 second
}