@workshopninja Yes, this is basically what I did with an Arduino MKR1000 WIFI some years ago. There are some #defines for the EEPROM in the code. But for me it worked out of the box with a 24LC32P. See also in the MyS lib code: hal/architecture/SAMD/MyHwSAMD.h#L47 But in the end I switched to the ESP8266 because it also has WiFi and is much cheaper. The support for external libraries is also much better than with the SAMD.