Can program run even when connection is down?

Need Help With My Project
1

Hi!
I’m new to Blynk, somewhat familiar with Arduino and remember only basics of C++.
With that out of the way I need help with my coal-heater driver, I don’t know its name in English, but it’s one of those: http://regiodom.pl/portal/sites/regiodom/files/images/regiodompl/46/kociol-na-ekogroszek.jpg

I need my program to run even when internet (Blynk Cloud) connection is down. Right now it won’t start doing it’s thing until Blynk connects. I am using Arduino Mega 2560 with Ethernet Shield and Android App (Galaxy S8).

My main program is closed in myTimerEvent from one of the examples from sketch builder, but I also use some BLYNK_WRITE(pin) functions.
My loop looks like this:

void loop ()
{
  Blynk.run();
    timer.run(); // Initiates BlynkTimer
  t = rtc.getTime();
   int godzina = string.toInt(t.hour);
}

I found only one topic about this, but long and without one, proven and working solution that I would understand.
The place that the driver will be used in is connected to the world by LTE router and I don’t trust it, because it gave us some downtime in the past. The Blynk interface is used only as optional input/output option, so I don’t have to touch my flimsy box with flimsy buttons every time it’s cold :slight_smile:

2

Blynk Timer is an Arduino function and runs without a network connection. So you simply need to put an if statement around Blynk.run().

if(Blynk.connected()){
  Blynk.run();
}

Move all the other stuff out of loop and in to a timed function.

There are also threads on this site to ensure your system runs if your Arduino reboots when the network connection is down because Blynk.begin() is a blocking routine that you need to bypass.

3

Check out this thread for details of how to bypass Blynk.begin() with systems that are not using ESP’s as the main MCU Brown outs or reboots

4

Thank you Costas, will dive right into it!