Communication Module

The HC-05 Bluetooth Module is a widely used wireless communication module designed for serial data transmission. It allows microcontrollers such as Arduino, Raspberry Pi, and other embedded systems to communicate with smartphones, tablets, or other Bluetooth-enabled devices. The module supports both Master and Slave modes, making it flexible for various IoT and robotics applications.

The RFID Module (RC522) is a contactless communication module used for reading and writing RFID cards and tags. It operates at 13.56 MHz and is widely used in applications like access control systems, attendance systems, and security authentication projects with microcontrollers such as Arduino and Raspberry Pi.

The RFID Card is a contactless smart card used for identification and authentication in RFID systems. It works with 13.56 MHz RFID readers such as the RC522 module and is commonly used in access control, attendance systems, and security applications.

The SIM800L GSM/GPRS Module is a compact cellular communication module that enables microcontrollers to send SMS, make calls, and connect to the internet using a SIM card. It is widely used in IoT, GPS tracking, and remote monitoring projects.