> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # 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. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=CE00021:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/CE00021:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## 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)