is about to check the entrance of workers, arduino + ethernet shield + mifare rc522.
each time the mifare shield detects a card read the serial number and send a request trough the ethernet shield to a php page which sends a query to mysql to check and obtain data associated with the serial number and if not exist the record in table insert in it
arduino spi ss 10 to ethernet shield
arduino spi ss 9 to mifare mc522 rfid
Did you need to use a level shifter? Or is the RC522 able to handle 5V logic inputs? I am busy designing a board and need to know if I need to incorporate a level shifter or not.
