# Bluetooth Module (HC-05)

**Type:** Product page · **SKU:** CE00021 · **Brand:** [Core Electronics](https://core-electronics.com.au/brands/core-electronics-australia)
**Page:** https://core-electronics.com.au/bluetooth-module-hc-05.html ([markdown](https://core-electronics.com.au/bluetooth-module-hc-05.html.md))

This Bluetooth Module provides a cheap, reliable TX/RX pipeline for your project using the classic Bluetooth protocol. With in-built logic level shifting it can also be used with Arduino and other 5V systems.

## Pricing

- **Price:** $13.55 (inc GST) — $12.32 AUD, exc GST
- **Quantity discounts:** 10+ $11.09 (exc GST) · 50+ $10.47 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 1 today; more stock is typically available with a 8–12 day lead time.

## Description

Add bluetooth to your project with the HC-05 Bluetooth Module and get access to a simple Rx/Tx pipeline through classic bluetooth protocol. The HC-05 module itself is mounted onto a breakout board which provides easy, breadboard friendly 0.1" headers for Power, Ground, TX, RX, and enable pins. The breakout board also provides a 3.3V regulator so you can power it with 5V from an Arduino or other 5V board.

- **Tx/RX Pipeline** - The HC-05 is designed to be a transparent TX/RX serial pipeline which allows devices to communicate over serial as they would through a wired connection. The is made possible by the Bluetooth software stack that is onboard the HC-05 module.
- **Range** - With a range of 30ft (~10m) you can send serial data with ease.
- **AT command mode** - You can easily enter the AT command mode using the broken out connection to Pin34. **NB:** *Some models have a button instead of a pin, and some have neither - these models have an EN pin. See our tutorial link below for more detail.*
- **Baud Rate Range** - Your HC-05 uses a baud rate of 9600 by default but can go higher. To change it, you'll need to use the relevant AT commands.
 
### Using the HC-05 Module in your project

Getting started with the HC-05 is as simple as connecting it up to your microcontroller, configuring it using simple AT commands, and then pairing it with other Bluetooth devices.

**\*\*The HC-05 and HC-06 are 3.3V devices. They have a 5V regulator on board so you can power them with 5V, however, for communication and to use the KEY pin with a 5V board such as an Arduino Uno, you'll need a logic level converter such as our [bi-directional logic level converter](https://core-electronics.com.au/logic-level-converter-bidirectional.html)\*\***

Some HC-05's come with an onboard button which is connected to pin34 of the HC-05 module to enter into AT command mode, whereas others have a pin broken out to the header. We've covered using both versions of the board in our Bluetooth tutorial below.

[Our complete guide for using the HC-05 Bluetooth Module.](https://core-electronics.com.au/tutorials/how-to-use-bluetooth-modules.html)

If you want more, download the The HC-05 Product User Guide for a more detailed overview of this product, technical specifications, pinouts, and examples for use with Arduino, Raspberry Pi and Firewing development boards.

### The key differences between the HC-05 and HC-06 Bluetooth Module

The HC-05 can be configured as either a Master or a Slave device, whereas it's brother, the HC-06, can only be used as a Slave device.

### Technical Specifications

- Bluetooth protocal: 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
- Profiles: Bluetooth serial port
- Power supply: +3.3VDC 50mA
- Working temperature: -20 ~ +75Centigrade
- 44mm x 16mm x 7mm

## Guides for this product

- [How to Use HC-05 Bluetooth Modules](https://core-electronics.com.au/guides/wireless/how-to-use-bluetooth-modules/)
- [How to Choose a Bluetooth Module For Your Project](https://core-electronics.com.au/guides/wireless/how-to-choose-a-bluetooth-module-for-your-project/)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/0/1/018-hc-05.jpg)