Bluetooth

HC-05 Bluetooth Module

  • HC-05 Bluetooth 2.0 serial communication module for adding wireless connectivity to microcontrollers.
  • Provides a simple UART interface for communicating with Arduino, ESP32-compatible systems and other embedded controllers.
  • Supports Bluetooth Classic communication and can operate as a master or slave device.
Compatible Platforms: Arduino Raspberry Pi ESP 32

SKU: hc05-bluetooth-module

In Stock
$6.00
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HC-05 Bluetooth Module

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The HC-05 is a Bluetooth Classic wireless communication module designed to provide an easy way to add Bluetooth connectivity to microcontrollers and embedded systems. It communicates with the host controller through a standard UART serial interface, making it particularly easy to integrate with Arduino and other development boards.

The module can operate as either a Bluetooth master or slave, allowing it to establish wireless serial connections with compatible Bluetooth devices. This makes it suitable for applications such as wireless control, robot control, sensor data transmission, serial communication and mobile-device interfacing.

The HC-05 is commonly supplied on a breakout board with an onboard voltage regulator and interface circuitry. The module can be configured using AT commands to change settings such as the Bluetooth device name, pairing PIN, baud rate and operating mode. Exact breakout-board specifications can vary between manufacturers.

The HC-05 uses Bluetooth Classic rather than Bluetooth Low Energy (BLE), making it well suited to traditional Bluetooth serial-port applications where a simple wireless UART connection is required.

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Technical Specifications

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Module HC-05 Bluetooth Module
Bluetooth Version Bluetooth 2.0 + EDR
Bluetooth Type Bluetooth Classic
Operating Mode Master / Slave
Communication Interface UART / TTL Serial
Typical UART Baud Rate 9600 bps by default; configurable via AT commands
Logic Level 3.3V logic
Supply Voltage Typically 3.3V for the HC-05 module; common breakout boards accept approximately 5V
Frequency 2.4GHz ISM band
Wireless Range Typically up to approximately 10m, depending on environment and module version
Configuration AT commands
Antenna Onboard PCB antenna
Connector Typically 6-pin header
Applications Wireless serial communication, robotics, remote control, sensor data and automation
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