Use the virtual pin

1

My project is garage door opener also it’s voice command opener .am using Amazon echo too .
I just need an LED to indicate if the door open or close or LCD to moniter in the blynk .how can I do that in Blynk am using button to open and close .
What should I add to my code to make it works
and how i can use the virtual PIN in blynk
And this is my code

// This #include statement was automatically added by the Particle IDE.
#include "blynk/blynk.h"


//#include "application.h"
#include "blynk/blynk.h"
#define GARAGE_ON D0
#define GARAGE_OFF D3
#define POWER D7


char auth[] = "xxxxxxxxxx";



void setup() {
    //digitalWrite(POWER,HIGH);
      Serial.begin(9600);
  Blynk.begin(auth);
    
    pinMode(GARAGE_ON,OUTPUT);
    pinMode(GARAGE_OFF,OUTPUT);
    pinMode(POWER,OUTPUT);
    Particle.function("cloudFun1", fun1);

}

void loop() {
    
    digitalWrite(POWER,HIGH);
    
  Blynk.run();     

}
int fun1(String args) {
 digitalWrite(GARAGE_OFF, HIGH);
 delay(500);
  digitalWrite(GARAGE_OFF, LOW);
 return 1;
}
2

Hello. I recommend you to start from docs it has all necessary info - http://docs.blynk.cc/#blynk-main-operations-virtual-pins

3

can u please give me and example I cant understand the one in the doc

so if I need to use LED in the app to light on wen D1 is on for example .

how I can write it in the code

is it like this
BLYNK_WRITE(V1) {
if (param.asInt()==0)
digitalWrite(D1, HIGH);
else
digitalWrite(D1, LOW);
}

please just how me in small cade how to

4

We have few examples for different cases https://github.com/blynkkk/blynk-library/tree/master/examples/Widgets/LED