B4R Question multiple RFID-RC522 on the same bus?

[giggetto71]

Hi,
does any one have experience with more than one RFID-RC522 reader on the same bus?
thanks

 

[emexes]

In the absence of replies... :

I haven't used that particular board/chip, but generally for SPI it is possible to hang multiple slaves off a single microcontroller SPI master, sharing the SCK, MOSI and MISI lines but using individual chip selects (for RC522 aka NSS = "Not Slave Select") so that the microcontroller is only talking to and hearing from one device at a time.

 

[giggetto71]

ok thanks!