digitalWrite won't work unless i use a button connected to digital pin first

Solved
1

This code is working. It activates relays and toggles LED widgets. The problem is it will not set the digital pins to high or low unless I first use a button widget set to the digital pin. Then it works as expected. I have to do this each time the processor is turned off and on.

void setup()
{
  Serial.begin(38400); 
  Blynk.setDeviceName("Blynk");
  Blynk.begin(auth);
}
 
BLYNK_WRITE(V0) {
 int pinValue = param.asInt();
 if (pinValue == 1)
 {
    digitalWrite(2, HIGH);
    Blynk.virtualWrite(V1, 255);
    Blynk.virtualWrite(V2, 0);
    delay(200);
    digitalWrite(2, LOW);
  } 
}
BLYNK_WRITE(V4) {
 int pinValue = param.asInt();
 if (pinValue == 1)
 {
    digitalWrite(13, HIGH);
    Blynk.virtualWrite(V1, 0);
    Blynk.virtualWrite(V2, 255);
    delay(200);
    digitalWrite(13, LOW);
  } 
}
BLYNK_WRITE(V5) {
   int pinValue = param.asInt();
 if (pinValue == 1)
 {
    digitalWrite(12, HIGH);
    Blynk.virtualWrite(V8, 255);
    Blynk.virtualWrite(V9, 0);
    delay(200);
    digitalWrite(12, LOW);
  } 
}
BLYNK_WRITE(V10) {
   int pinValue = param.asInt();
 if (pinValue == 1)
 {
    digitalWrite(14, HIGH);
    Blynk.virtualWrite(V9, 255);
    Blynk.virtualWrite(V8, 0);
    delay(200);
    digitalWrite(14, LOW);
  } 
}
void loop()
{
  Blynk.run();
}
2

It probably needs a pinMode declaration in your void loop.

Pete.

3

thank you. I put the pinMode declaration in the void setup and it works.