Mega+ESP will freeze if there is a connection problem

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Hello. We try not to reopen old topics here… things keep changing and even old issues may have new solutions.

I have moved your issue into a new topic.

Blynk.begin() is a blocking command… no connection, no further action. Period.

Normally that was the only option for an Arduino & shield combo, but now Blynk.config() seems to work with such combos and is non-blocking and will allow the rest of the sketch to keep running without Blynk connection… But you do need to figure out the Wifi connection/reconnection routines for your needs.

I use this startup and reconnection routine with my Mega/ESP-01 combo… seems to work OK.

In pre setup

#include <ESP8266_Lib.h>  // ESP-01 Link
#include <BlynkSimpleShieldEsp8266.h>  // ESP-01 Link

In my void setup()

  wifi.setDHCP(1, 1, 1); //Enable dhcp in station mode and save in flash of esp8266
  Blynk.config(wifi, auth, server, port);
  if (Blynk.connectWiFi(ssid, pass)) {
    Blynk.connect();
  }

In void loop()

void loop() {
  timer.run();

  if (Blynk.connected()) {  // If connected run as normal
    Blynk.run();
  } else if (ReCnctFlag == 0) {  // If NOT connected and not already tring to reconnect, set timer to try to reconnect in 30 seconds
    ReCnctFlag = 1;  // Set reconnection Flag
    Serial.println("Starting reconnection timer in 30 seconds...");
    timer.setTimeout(30000L, []() {  // Lambda Reconnection Timer Function
      ReCnctFlag = 0;  // Reset reconnection Flag
      ReCnctCount++;  // Increment reconnection Counter
      Serial.print("Attempting reconnection #");
      Serial.println(ReCnctCount);
      wifi.setDHCP(1, 1, 1); //Enable dhcp in station mode and save in flash of esp8266
      Blynk.config(wifi, auth, server, port);
      Blynk.connect();  // Try to reconnect to the server
      if (Blynk.connectWiFi(ssid, pass)) {
        Blynk.connect();
      }
    });  // END Timer Function
  }
}

You will have to look through all that and figure out the bits you want/need.

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