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I would like to find out if the standard Arduino Ethernet library handles possible re-connections automatically like ESP8266WiFi library does with wifi.

If for some reason the Ethernet connection, that has been established with

Ethernet.begin(mac, ip);

is lost do I have to establish a new connection in my sketch?

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  • it can't be lost. it is still one device on network if the cable is not connected Commented Jan 14, 2021 at 10:43
  • I think this conversation explains the issue in detail: [link] forum.arduino.cc/t/reconnecting-to-ethernet/100652 Commented Jun 6, 2021 at 13:33
  • for unplugged cable there is now Ethernet.linkStatus(); with example in IDE Examples menu Commented Jun 6, 2021 at 15:04
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