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 (); }

The complete code for Controlling LED using Blynk App and ESP8266 is given at the end. Include all the required libraries for ESP8266 and Blynk App in the code, as shown below: #define BLYNK_PRINT Serial #include <ESP8266WiFi.h> #include <BlynkSimpleEsp8266.h>

To blink the built-in LEDs we have to only connect NodeMCU to the computer using a micro USB cable. No external component is required. On Board LED for ESP8266 is connected wtih GPIO2. For NodeMCU it is connected with GPIO16 Code for Built-in LED Blinking This code is to blink built-in LEDs of NodeMCU.