#include <WiFi.h>
#include <WiFiClient.h>

int sn = 19;

void setup() {
 
   pinMode(sn, OUTPUT);

}

void loop() {
  digitalWrite(sn, 1);/// wait signal database=1
  delay(2000); // delay 2s 
  digitalWrite(sn, 0);
  delay(10000);
  
  }