HC-05 Bluetooth Module
HC-05 Bluetooth Module pin configuration
HC-05 Bluetooth Module
HC-05 Bluetooth Module
  • HC-05 Bluetooth Module
  • HC-05 Bluetooth Module pin configuration
  • HC-05 Bluetooth Module
  • HC-05 Bluetooth Module

HC-05 Bluetooth Module

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Rs. 309
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Rs. 309
Regular price
Rs. 409
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  • To setup Wireless Serial Communication, HC-05 Bluetooth Module is most demanding and popular due to its low price and extremely high features.
  • Used for a GPS navigation system, water, and electricity gas meter reading system.
  • Master/Slave Modes can be changed using AT Commands.
  • This module can be used in Master or Slave Mode and easy switchable between these two modes, By default Slave mode is configured.

HC-05 Bluetooth Module

The HC-05 Wireless Bluetooth Module without Baseplate is a slave-only device.  This means that it can connect to most phones and computers with Bluetooth but it cannot connect to another slave-only devices such as keyboards and other HC-06 modules. To connect with other slave devices a master module would be necessary such as the HC-05 version which can do both master and slave.

The slave mode in HC-05 cannot initiate a connection to another Bluetooth device but can accept connections. Master mode can initiate a connection to other devices.


  • Working current: matching for 30 mA, matching the communication for 8 mA.
  • Dormancy current: no dormancy
  • With the computer and Bluetooth adapter, PDA, seamless connection equipment.
  • Bluetooth module HC-08 Master and slave Two in one module.
  • Use the CSR mainstream Bluetooth chip, Bluetooth V2.0 protocol standards.
  • Potter default rate of 9600, the user can be set up.
  • Bluetooth protocol: Bluetooth Specification v2.0+EDR
  • Speed: Asynchronous: 2.1Mbps(Max) / 160 kbps, Synchronous: 1Mbps/1Mbps.
  • Security: Authentication and encryption.
  • Profiles: Bluetooth serial port.

Package Includes:


Serial communications 9600-115200bps
Frequency 2.4~2.524 GHz
Power Supply  3.3V
Dimensions  30mm x 14mm x 2.2 mm
Weight  5 grams

Frequently Asked Questions

1. What is the Bluetooth module HC-05? 

  • The HC-05 Bluetooth Module is a simple Bluetooth SPP (Serial Port Protocol) module that allows for the setup of a transparent wireless serial connection. Its communication is via serial communication which makes an easy way to interface with the controller or PC.

2. How do I connect the HC-05 Bluetooth module to Arduino? 

  • To connect a HC-05 to Arduino:

● Connect VCC of HC05 with 3.3V of Arduino, please do not connect it with 5V as that can cook the module 

● Connect GND with any GND of Arduino 

● Connect Rx pin with Tx of Arduino 

● Connect Tx pin with Rx of Arduino 

3. Why is the Bluetooth module used? 

  • The Bluetooth technology manages the communication channel of the wireless part. The Bluetooth modules can wirelessly transmit and receive data between two devices. With the help of the host controller interface (HCI), the Bluetooth module can receive and transmit data from a host system. 

4. How do I know if my HC-05 is working? 

  • The first thing to do is to power on the Bluetooth module and see if you can connect to it. For this, you need an Android device. With the Bluetooth module powered and the LED(s) blinking, on the Android device go to Settings - Connections - Bluetooth and scan for Bluetooth devices.