ESP32 Forum

I noted that have several variants for pins_arduino.h

What is the correct way of code, to set Arduino IDE to use a specific variant?

Easy , just use number on the ESP32 board.
Ex: if you want use D2 pin (on the board) like Blynk., you connect LED to that pin,
your code is :

void setup(){
pinMode(2,OUTPUT);
}
void loop(){
digitalWrite(2,HIGH);
delay(1000);
digitalWrite(2,LOW);
delay(1000);
}
The note is : pin map of ESP32 versions is not the same. See pin map and test before you countinue .....

Your question was how to set the board variant right?

This guy just made a post about the setup http://www.cnx-software.com/2017/05/07/ ... for-esp32/