Arduino Ethernet W5100 device stops responding after a few days

Projects Programming
1

I am running a simple web server (static IP) based on the default web server example, which is occasionally interrupted by an external input (eg. RFID reader) which sends data as a client to another server in the local network and starting the server again. the device runs as intended for a few days but then stops responding to pin inputs, accessing the server page seems to get it back online (not sure about this) otherwise I am forced to manually reset when this happens.

Could using Serial Print(used during the debugging stage) without connecting a serial monitor be the issue?

2

the device runs as intended for a few days but then stops responding to pin inputs

what does it mean ?

Could using Serial Print(used during the debugging stage) without connecting a serial monitor be the issue?

No (unless you have an Arduino with "native USB" port and waiting for the opening of the connexion and you happen to do while (!Serial); just before)

are you using the String class / running low in memory ?