With just a arduino card connected to pc i do sketch to test a slider wadget , to start easy programming.
Configure slider on blynk as below
Slider V2, from 0 to 200
Use pin 13 because it has a led in arduino board
Condition
If V2 slider >100 led pin 13 on
// You could use a spare Hardware Serial on boards that have it (like Mega)
#include <SoftwareSerial.h>
SoftwareSerial DebugSerial(2, 3); // RX, TX
#define BLYNK_PRINT DebugSerial
#include <BlynkSimpleStream.h>
// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = " ";
void moveControl(int x)
{
if(x>= 100) //is
{
digitalWrite(13,HIGH);
}
else
{
digitalWrite(13,LOW);
}
}
void setup()
{
// Debug console
DebugSerial.begin(9600);
// Blynk will work through Serial
// Do not read or write this serial manually in your sketch
Serial.begin(9600);
Blynk.begin(Serial, auth);
pinMode(13,OUTPUT);
}
void loop()
{
Blynk.run();
}
BLYNK_WRITE(V2)
{
int x = param.asInt();
moveControl(x);
}