I am planning on using 70+ WIZNET modules WIZ140SR for a test setup.
We have made a custom board that contains an ethernet switch and the WIZ140SR.
When we boot it up, we notice that about 50 % does not want to connect to the network and the others do.
The ones that do not, they have the LED of the module blinking during the firmware startup and configuration and then stopping with blinking. Then I notice that the TX/RX of the IP port continue to move around in the DC level.
The ones that work, work 100% perfectly on all sockets and all locations, the ones that do not work … don’t work ever.
What can be the reason, how can I debug further …
Thank you for the pointers,