I am using a WIZ820io with an Arduino Nano. If the WIZ820io is the only device on the SPI Bus it is working correctly. But when I add a second device (a MFRC522 RFID-Reader) to the SPI Bus - the module is not working any more. (MFRC522 => Works, WIZ820io => Not working)
I found an application note for w5100 which says that the SEN-Pin must be changed. But the w5200 didn’t have such a SEN-pin.
Hi,
The above my post is wrong. I am sorry that I mis-understood W5200 with W5100.
W5200 have no problem using multi slave.
So, WIZ820io have no SEN pin.
If you can’t use it with others, It maybe have another problem.