Virtual pin = only Zero

Need Help With My Project
1

I cant Serial.println(V0); a Virtual pin from the Blynk App.
I have a slider from 0 to 255 in the App
in the serial monitor it shows only a zero!

Thanks for Support!

BLYNK_WRITE(V6){
Serial.println(V0);
}

2

Virtual pins are specifically for use in Blynk functions… if you want to insert a virtual pin value into a variable, you first need to use something like this for a button, slider or other input widget…

int value;  // Globally declare variable... in this case as integer

BLYNK_WRITE(V0)  // Run this function when widget V0 is processed
{   
  value = param.asInt();  // Get value as integer... use other param.asX() options for float or string
  Serial.println(value);  // Print the content of the variable 'value'
}

Reading the Documentation is highly recommended :stuck_out_tongue_winking_eye:

http://docs.blynk.cc/#blynk-firmware-virtual-pins-control

http://docs.blynk.cc/#blynk-firmware-blynktimer-blynk_writevpin

1 Like
3

Thanks a lot it works fine!
Can i make more than one value?

int r;
int g;
int b;
BLYNK_WRITE(V0){
r = param[0].asInt();
g = param[1].asInt();
b = param[2].asInt();
Serial.println(r);
Serial.println(g);
Serial.println(b);
strip.Color(r, g, b);
}

#BlynkCommunityonTop

4

Is this for the zeRGBa Widget?

5

Yes

6

Read the documentation on this widget (link in my last post). You can get the values as you have shown, provided it is set to merge.

7

Ok Thanks