The HiLetgo HC-05 6 Pin Wireless Bluetooth RF Transceiver Module for Arduino is an essential solution for seamless wireless communication in your smart electronics projects. Engineered for high performance and reliability, this module is the top choice for electronics enthusiasts, robotics developers, smart home applications, and industrial automation.
Technical
Specifications
The HiLetgo HC-05 Bluetooth module
features a compact PCB size of 37.3mm (length) x 15.5mm (width) and an ultra-lightweight design at just 3.5g, making it easy to integrate into any Arduino or compatible development board project. It operates with an input voltage range of 3.6V to 6V (do not exceed 7V to prevent damage). The module has six main pins: EN, VCC, GND, RXD, TXD, and STATE, allowing straightforward connections and integration with various devices.
Features
This module includes a connection status indicator LED: fast flashing means no Bluetooth connection, slow flashing indicates entry into AT command mode. The built-in 3.3V voltage regulator ensures stable operation, with a current draw of about 30mA when not paired (due to LED flashing) and approximately 10mA after successful pairing. It supports an effective transmission distance of up to 10 meters in open areas; longer distances are possible but may affect connection quality.
Use Cases
The HC-05 is ideal for developing smart home applications, wireless control systems, robotics, remote controls, and data exchange between Arduino devices and PCs or other development boards. It's widely used in educational environments, laboratories, offices, and DIY home projects.
Benefits
The HC-05 provides full duplex serial communication without requiring complex knowledge of Bluetooth protocols, supporting the most common communication format: 8 data bits, 1 stop bit, and no parity. You can switch between host and slave modes via AT commands, as well as customize the module name, default baud rate (9600), and pairing password (1234). The module is easy to install thanks to its clear pin labeling and straightforward wiring method.
Care and Installation Instructions
To maintain optimal performance, do not exceed the input voltage of 6V (maximum 7V). Avoid exposure to high humidity or dust. Connect the pins according to the provided wiring diagram and use high-quality cables for reliable performance. Note: This module does not support iOS devices; it is compatible with Android, Windows, and Arduino platforms.
Brand: HiLetgo
Model: HC-05 6 Pin Wireless Bluetooth RF Transceiver Module
Origin: China
Suitable Environments: Laboratories, smart homes, offices, educational projects, engineering workshops
Unlock the power of wireless communication in your projects with the HiLetgo HC-05 Bluetooth Module—start building smarter and more connected solutions today!
