{
  "id": "rc522-rfid",
  "name": "RC522 RFID reader (13.56 MHz)",
  "category": "input",
  "pins": [
    {
      "name": "SDA",
      "role": "spi_cs",
      "notes": "This is the SPI chip select (CS), despite the SDA label"
    },
    {
      "name": "SCK",
      "role": "spi_sck"
    },
    {
      "name": "MOSI",
      "role": "spi_mosi"
    },
    {
      "name": "MISO",
      "role": "spi_miso"
    },
    {
      "name": "IRQ",
      "role": "int",
      "notes": "Interrupt, optional. Leave unconnected"
    },
    {
      "name": "GND",
      "role": "ground"
    },
    {
      "name": "RST",
      "role": "digital_in",
      "needsOutput": true,
      "notes": "Reset, active LOW"
    },
    {
      "name": "3.3V",
      "role": "power",
      "notes": "3.3 V only. Never 5 V"
    }
  ],
  "bus": "spi",
  "voltage": "3.3",
  "model": {
    "shape": "module",
    "size": [
      60,
      39,
      3
    ],
    "color": "#1F4FA8"
  },
  "keywords": [
    "rc522",
    "mfrc522",
    "rfid",
    "nfc",
    "card reader",
    "tag",
    "lettore rfid",
    "badge"
  ],
  "sources": [
    {
      "title": "NXP MFRC522 datasheet",
      "section": "SPI interface; supply 2.5 to 3.6 V"
    }
  ]
}