Example code to connect ESP8266 or ESP32 boards to Blynk

ESP8266 board connect to Blynk

#define BLYNK_PRINT Serial

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

char auth[] = "Your_AuthToken";
char ssid[] = "Your_Wifi_Name";
char pass[] = "Your_Wifi_Password";

void setup()
{
  Serial.begin(9600);

  Blynk.begin(auth, ssid, pass);
}

void loop()
{
  Blynk.run();
}

ESP32 board connect to Blynk

#define BLYNK_PRINT Serial

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

char auth[] = "Your_AuthToken";
char ssid[] = "Your_Wifi_Name";
char pass[] = "Your_Wifi_Password";

void setup()
{
  Serial.begin(9600);

  Blynk.begin(auth, ssid, pass);
}

void loop()
{
  Blynk.run();
}