HC-05 Wireless Bluetooth Transceiver

The HC-05 Bluetooth module is a compact and powerful solution for integrating Bluetooth communication into your projects. Here are the key specifications and pinout details:

Specifications:

• Bluetooth Protocol: Complies with Bluetooth Specification v2.0+EDR (Enhanced Data Rate).
• Frequency: Operates in the 2.4GHz ISM band.
• Modulation: Utilizes GFSK (Gaussian Frequency Shift Keying).
• Emission Power: Up to ≤4dBm (Class 2).
• Sensitivity: Receives signals down to ≤-84dBm at 0.1% BER.
• Speed:
• Asynchronous communication: 2.1Mbps (Max) / 160 kbps
• Synchronous communication: 1Mbps/1Mbps
• Security: Supports authentication and encryption.
• Profiles: Provides a Bluetooth serial port profile.
• Supply Voltage: Operates within the range of +3.3V to 6.0V.
• Supply Current: Typical current consumption is around 30mA.
• Working Temperature: Suitable for use between -20°C to +75°C.
• Dimension: Compact size of approximately 26.9mm x 13mm x 2.2mm.

Pinout:

1. KEY/EN: Used to switch the Bluetooth module between AT commands mode and data mode. Default baud speed in command mode is 38400bps, and in data mode, it’s 9600bps.
2. VCC: Connect to 5V or 3.3V to power the Bluetooth module.
3. GND: Ground connection.
4. TXD: Transmit data from the module to the microcontroller (connect to the microcontroller’s RXD pin).
5. RXD: Receive data from the microcontroller (connect to the microcontroller’s TXD pin).
6. STATE: Acts as a status indicator, checking if the module is connected.

Ideal Applications:

• Wireless Communication: Use it for wireless data exchange between devices.
• Remote Control: Create Bluetooth-controlled robots, home automation systems, or smart devices.
• Sensor Networks: Connect sensors wirelessly to a central controller.
• IoT Prototyping: Ideal for Internet of Things (IoT) projects.

Whether you’re building a smart home system, a robot, or a custom Bluetooth-enabled gadget, the HC-05 Bluetooth module simplifies wireless communication. 

This product can be found here:

• Bluetooth
• Components & Parts
• Wireless Connectivity