It has been a long time since i made that, But if I remember correctly…
1)Search for a file within the arduino: BlynkProtocol.h and edit it.
do a find and remove the comments on ALL the lines like this:
//BlynkOnDisconnected();
There are 5 or six or so from memory
2)With the edited version saved, you can now use:
CAYENNE_CONNECTED(){
//Do Stuff for Online here
}
}
CAYENNE_DISCONNECTED(){
//Do Stuff for Offline here
}
Hope this helps 