Arduino Mega based PLCduino.
wit wifi only.
Unit shows offline periodically since 2 days ago. Reset and still not online. Serial monitor shows connected. Re-uploaded basic sketch example from @kreggly and still offline. When I got home yesterday, the serial monitor was showing ping with 512ms then invalid hw or cs, can’t remember which but could not duplicate that portion. Another mega and an uno had the same problem last week but after several resets the problem went away. Now if I disconnect he USB cable it goes offline as well.