Hi, I wanted to stack Adafruit's Data Logging Shield and the RFID/NFC Shield and was wondering if this would be possible since the Data Logging Shield uses SPI while the RFID/NFC Shield uses I2C. I'm very new to this topic so if you could explain the difference between SPI and I2C, that would be r…

Stacking two shields with different communication protocols

ieee488 May 16, 2018, 8:49pm 2

SPI uses D10, D11, D12, D13
I2C uses A4 and A5

no overlap