Blynk, but continue program if Blynk connection fails

Question

I'm having an issue with Blynk.begin(auth, ssid, pass); The problem is, when it fails to connect to the wifi, the rest of the program does not continue.

I'm using a Wemos D1 and it is also controlling some relays based on a temperature sensor. But when there was a power outage and power comes back on, the programs should continue whether the wifi is working or not, so that relays can still be controlled by the temperature sensor reading.

What happens now is if there is a wifi issue when Wemos D1 is starting up again, the program simply stops in the void setup() at Blynk.begin(auth, ssid, pass); and the rest of the program cannot be executed.

Anyone knows how to avoid this?

Kind regards, Peter

Answer 1

You can try my Blynk_WM or Blynk_Async_WM library with their Blynk.begin() functions are not blocking.

---

Check Why using this Blynk_WiFiManager with MultiWiFi-MultiBlynk features

Why using this Blynk_WiFiManager with MultiWiFi-MultiBlynk features

You can see that the system automatically detects and connects to the best or avaiable WiFi APs and/or Blynk Servers, whenever interruption happens. This feature is very useful for systems requiring high degree of reliability.

Moreover, this Blynk.begin() is not a blocking call, so you can use it for critical functions requiring in loop().

Anyway, this is better for projects using Blynk just for GUI (graphical user interface).

In operation, if WiFi or Blynk connection is lost, Blynk.run() will try reconnecting automatically. Therefore, Blynk.run() must be called in the loop() function. Don't use:

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

just

void loop()
{
  Blynk.run();
  ...
}

---

It's also beneficial to search in Blynk Forum for more information and examples