we tested a batch of Wiz550io modules with an ioShield-A and an Arduino DUE.
Wiz550io plugged into ioShield-A plugged in turn into Arduino DUE.
- plug the usb cable to supply the Arduino
- plug Ethernet cable form router
- look at activity LEDs on Ethernet receptacle.
Some Wiz550io modules have their Activity LEDs working/blinking.
Some other modules don’t blink at all.
Why such a different behavior?
In case of no Activity LEDs does it mean that the RJ transformer is broken?
Thanks for support.