RFID SS pin on UNO

Projects Programming
1

Hi,
I'm fairly new,
I'm having trouble getting the MFRC522 RFID reader to function when I set any other pin than 10 as SS.
I'm using the AddicoreRFID library and even when I use the Example from that and change the ss PIN it will not read a tag.
I understand that the SS must be set low and the reset high for the RFID board to work and it does appear that any pin can be selected. It does work when I use pin 10.
I wish to use the board with a W5100 Ethernet Shield and therefore need to use another pin as SS for the MFRC522 but currently its a little hopeless.

I'd appreciate any help that's offered.

Thanks

2

Read this. They say that any pin can be used for SS as long as you don't use a shield with a hard wired SS pin.

I understand your Ethernet shield uses SPI to speak to the UNO, does it prevent you from wiring other pins for the MFRC522 reader ?

3

It should work together and having done a bit of research needs a 12v supply to do so. I was under the understanding that I could switch from RFID to Ethernet on the SPI using the SS pin as long as I didn't try both at the same time?

4

Yes I think you are right

5

Its still intermittent, Ive an LED on the SS for the Ethernet shield and it comes on so Shield is disabled but it still is either only reading the RFID data once or not at all. mostly not at all.
It's incredibly frustrating.