Could be a Arduino Yun and/or networking thing? Perhaps power as when disconnected from the USB it will run off of whatever else you supply, and perhaps that isn’t up to the challenge?
I don’t think it’s a power problem, I’ve been using this hardware for several years but with competing software.
then after this software was updated I had problems connecting to my ISP.
so I decided to change software.
I don’t think power because after Arduino disconnects if I connect the USB cable it doesn’t reconnect, I have to open the serial monitor.
I think more of a bug on the library that runs the W5500 that from what I see in the forum is little used.
Blynk is constantly communicating across the device, unlike some other apps or programs. This will make hardware instabilities stand out quicker.
I ditched mine years ago as even USB link was super stable compared to my Chinese Ethernet adapter… which did work with basic Arduino examples, just not with Blynk’s constantly-in-use link.
The adapters are generally the issue, particularly the Chinese clones. Many using the Arduino original ethernet shields, and even some lucky clones, can run with that library and no issue… others find them unstable if you look at it sideways.
All this means is that you just rebooted the Arduino… that is a normal result when opening the Serial Monitor with an Arduino.
You can search this forum for some possible “After Blynk disconnection, keep code running and attempt reconnection” options that will even work with Arduino with shield (although generally meant for ESP and WiFi)
As per the docs, you need to establish your own network connection prior to that command. I have long forgotten how that is done with ethernet, but I am sure you can figure it out as it will be the same way as with non-Blynk code.
Not in the Sketch Builder. Just connecting to ethernet is not a Blynk specific process.
So aside from the Blynk.Begin() method that does it for you as part of the connection package (using basic DHCP), you can easily search this forum to see if/how others have done it other ways.
Oh… nooo… everyone, please send me all old Arduinos you would otherwise dispose of, I use them for lots of things besides (and including) IoT (JK of course, while I would gladly take them, the shipping would make it a invalid proposition )
Heck, I wish I had one… it is a much faster version of the Mega (32 bit), more memory and with 3.3v GPIO, it merges better with combined ESP and related sensor setups. And a metric butt ton of GPIO