Code stopped in case of CONNECTING_CLOUD failure

[John93]

First of all, BlynkEdgent.begin and BlynkEdgent.run are both blocking functions.

Second,

@chrisE

timer.setInterval(500L,blinken);

To use timer you have to define a BlynkTimer object first, then add a function in the void loop to call it.
I recommend you to read this very useful article

Using BlynkTimer or SimpleTimer

Many users seem to struggle with the basic concepts of using BlynkTimer in their projects, despite the excellent discussions and tutorials that exist on this forum, so I thought I’d write a guide that will hopefully help clarify things. It’s rather long, as it attempts to explain the reasoning behind why and how we use timers, and covers some more advanced subjects, but I’ve tried to organise it in a way that helps people to find answers to specific questions… Why use a timer at all? Let’s say …