Solve problem with “511” at W5100 Ethernet shield
I have an W5100 Ethernet shiled who work ok in home network, but notwork in other network, so I search about this problem and find solution.
In my case, manufacturer put a wrong value for a quad resistor, instead 51 ohms (noted 510) was put 510 ohms (noted 511)…
Original shield have 49R9 (49.9 ohms), see schematic.
In article named The W5100 bug(s) – and how to fix it (them) are presented more problems.
For my problem, exist 2 solutions: change qaud resistor or put 2 resistor with 100 ohms value at Ethernet connector.
Second solution is easy and quickly, so I made this modifications
and now W5100 Ethernet shield works