#include<ESP8266HTTPClient.h> 
#include<ESP8266WiFi.h> 
#define BLYNK_TEMPLATE_ID "TMPL3f6l9xU6t" 
#define BLYNK_TEMPLATE_NAME "CONTROL LED 1" 
#define BLYNK_AUTH_TOKEN "NdNGErdPVS2TcadGbrURXR1F7kx1o8R4" 
#define BLYNK_PRINT Serial 
#include <BlynkSimpleEsp8266.h> 
char auth [] = BLYNK_AUTH_TOKEN; 
char ssid [] = "hotspot user"; // Enter your Wi-Fi Username 
char pass[] = "hotspot password"; // Enter your Wi-Fi password 
int ledpin = D4;
void setup() 
{
Serial.begin(115200); 
Blynk.begin(auth, ssid, pass); 
pinMode(ledpin, OUTPUT); 
} 
void loop() 
{Blynk.run(); 
}