Great thread but the answer to getting RC522 to work is still unclear to me.
My goal is to Spark.publish the RFID tag to the spark cloud. It should be simple enough but at the moment I can't even get the example dumpinfo.ino to read my cards. My plan was to get dumpinfo.ino working and then modify it to publish the tag to spark's cloud API as well as light the onboard D7 LED.
I notice that MISO, MOSI, SCK & SDA(SS) don't seem to be #define in the example dumpinfo.ino document (and libraries) - might this be where i'm going wrong?
Any advice would be much appreciated @peekay123 & @ParticleCommunity