HC 05 Bluetooth Module with TTL Output

HC 05 Bluetooth Module with TTL Output

The HC-05 module is based on the CSR BC417 Bluetooth chipset, supporting Bluetooth 2.0 + EDR standards.
It provides transparent serial communication over Bluetooth, making it a reliable choice for wireless data transmission, robot control, home automation, and embedded system projects.

This module includes an onboard 3.3V voltage regulator and logic-level compatible pins that can connect directly to 5V microcontroller systems.
The key pin allows mode selection between AT Command mode (for configuration) and Data mode (for communication).

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Specifications:- 

• Profiles: Bluetooth serial port Profile
• Bluetooth protocol: Bluetooth Specification v2.0+EDR
• Frequency: 2.4GHz ISM band
• Modulation: GFSK(Gaussian Frequency Shift Keying)
• Emission power: ?4dBm, Class 2
• Sensitivity: ?-84dBm at 0.1% BER
• Speed: Asynchronous: 2.1Mbps(Max) / 160 kbps, Synchronous: 1Mbps/1Mbps
• Security: Authentication and encryption
• Power supply: +3.3VDC 50mA
• Working temperature: -20 ~ +75Centigrade
• Dimension: 26.9mm x 13mm x 2.2 mm

Advantages

• Plug-and-play serial communication
• Dual-mode operation (Master/Slave)
• Reliable wireless range and low latency
• Compatible with all popular development boards
• Configurable parameters using simple AT commands

Applications

• Wireless serial data communication
• Arduino and Raspberry Pi projects
• Bluetooth-controlled robots or vehicles
• Home automation and IoT systems
• Wireless programming or monitoring
• PC-to-microcontroller communication