ESP-01+Aduino Pro Mini + Blynk

#include <ESP8266.h>
#include <BlynkSimpleShieldEsp8266.h>
#include <DHT.h>
#include <SimpleTimer.h>
#define DHTPIN 2
#define DHTTYPE DHT11   // DHT 22 Change this if you have a DHT11
DHT dht(DHTPIN, DHTTYPE);
// Set ESP8266 Serial object
#define EspSerial Serial
ESP8266 wifi(EspSerial);
SimpleTimer timer;


// Declare Constants

const int ledPin = 13;             // Built-in LED
const int RelayPin = 4;             // Relay Pin

char auth[] = "Auth_Token";
void setup()
{
 //No Serial console as the Nano only has 1 HW Serial
  EspSerial.begin(115200);  // Set ESP8266 baud rate
  delay(10);
  Blynk.begin(auth, wifi, "WifiNetworkName", "WifiPassword");
  timer.setInterval(1000, sendData);
    pinMode(ledPin, OUTPUT);
    pinMode(RelayPin, OUTPUT);
}
void sendData()
{
//Read the Temp and Humidity from DHT
  float h = dht.readHumidity();
  float t = dht.readTemperature();
//Write values to V04 and V05
  Blynk.virtualWrite(4, h);
  Blynk.virtualWrite(5, t);
}
void loop()
{
  Blynk.run();
  timer.run();
}