Hi,
I just recently started learning how to use arduino, I had no problems getting the ethernet or LCD shield to work for a project involving task tracking(in a machine shop) with RFID.
The problem is, I cant get the RC522 to work, I have tried several libraries and checked and redone the wiring multiple times but I get nothing, at this point if it was a problem with the wiring I would had make the same mistake consistently over 20 times. Most libraries simply do nothing, the only one who gives any kind of error is the one recomended in Arduino Playground - MFRC522 GitHub - miguelbalboa/rfid: Arduino RFID Library for MFRC522, that one shows:
MFRC522 Software Version: 0x0 (unknown)
WARNING: Communication failure, is the MFRC522 properly connected?
I even bought a 2nd RFID module thinking that the one I had was defective somehow.
Weirdest part is, it worked one using the library and example(and rewiring) from here Week10Segment1 - MAKECourse but now it doesn't and I haven't touched anything (code or wiring) since.
I would appreciate any help.
EDIT: Just in case it's relevant I'm using an arduino uno(tried it on a mega and didnt work either) with the arduino IDE under windows 7 64bits.