DESCRIPTION 125KHz Cards are a type of contactless smart card used for identification and access control. FEATURES Read-Only Operation: Cannot be reprogrammed or rewritten, which guarantees high security against cloning or altering. Low Frequency: Operates at 125 kHz. Passive Technology: Contains no internal battery; it harvests energy from the electromagnetic field generated by the door reader to transmit its ID. Standard Memory: Holds a 64-bit unique identifier (UID).Form Factor: Usually supplied as a durable, waterproof PVC/ABS CR80 card (standard credit card size) or as a key fob. Reading Range: Typically ranges between 2 cm to 15 cm depending on the reader. APPLICATIONS Door Access Control: Standard security systems for offices, apartment buildings, and gated communities. Time and Attendance Tracking: Used at employee clock-in terminals. Parking Management: Gate barriers for automated parking systems. Event Management: Tracking entry and access for conferences and secure venues. Micro-payment & Vending: Closed-loop systems for arcade tokens, laundry facilities, or canteen credits.

DESCRIPTION The PN532 NFC card reader module enables contactless communication with NFC cards and devices. It supports multiple communication interfaces and is widely used in secure authentication systems. FEATURES Supports NFC and RFID protocols Compatible with Raspberry Pi and Arduino Multiple interface options High communication reliability Compact module design APPLICATION NFC authentication systems Smart card readers Secure access control Payment terminals IoT identification systems