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cembeddedavrethernetlan

Wiznet W5100 unplugged cable detection

How to detect if cable is unplugged on W5100 Ethernet controller?.

In datasheet I can't find register for cable detection. But chip provides LAN status LED.

Solution

  • W5100 does not support reading register to get status if cable is plugged or not (network available or not). You can only check by doing fake connection and wait for either any response or timeout.

    Instead, you should use W5200 which has this feature.