The HC-05 Bluetooth Module enables wireless serial communication between your microcontroller and Bluetooth enabled devices such as smartphones, tablets, or computers. Using the Bluetooth 2.0 + EDR protocol, this module allows your Arduino or other development board to send and receive data wirelessly over a serial connection (UART). It acts as a bridge between your microcontroller and a mobile device, making it easy to control projects remotely or transmit sensor data. The HC-05 can operate in Master or Slave mode, allowing it to either connect to other Bluetooth devices or accept incoming connections. Configuration can be done through AT commands, giving you control over device name, baud rate, and pairing settings. This module is widely used in robotics, home automation, wireless monitoring systems, and STEM education projects, making it one of the most popular Bluetooth modules for Arduino based builds. Highlights: Wireless Serial Communication: Enables UART communication between microcontrollers and Bluetooth devices. Master & Slave Modes: Can both initiate connections and accept connections from other Bluetooth devices. AT Command Configuration: Easily configure settings such as device name, baud rate, and pairing mode. Wide Compatibility: Works with Arduino, ESP boards, and many other microcontrollers. Compact Design: Small PCB module that integrates easily into electronics projects. Specifications: Operating Voltage: 3.6-6V (logic level 3.3V). Bluetooth Version: Bluetooth 2.0 + EDR. Frequency Band: 2.4GHz ISM band. Communication Interface: UART (TX/RX). Default Baud Rate: 9600 bps. Speed: Asynchronous: 2.1Mbps(Max) / 160kbps. Synchronous: 1Mbps. Operating Modes: Master / Slave. Communication Range: Up to ~10 meters. Pass key: 1234. Dimensions: ~45×16×7mm. Interface: 6-pin (EN, VCC, GND, TXD, RXD, STATE). Ideal For: 🤖 Wireless robot control projects. 📱 Smartphone controlled Arduino applications. 🏠 Smart home & IoT automation systems. 📡 Wireless data transmission between devices. 🎓 Arduino & STEM education projects. Note: Product appearance may vary slightly from the images shown. Text or markings on the module may differ depending on the batch.
