TTGO T-Call V1.3 ESP32 SIM800L Wireless Communication Module

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.