Allows your device to both send and receive the TTL data via Bluetooth technology without connecting a serial cable to your computer.
· HC05 Works with any USB Bluetooth adapters.
· Default Baud Rate: 9600,8,1,n.
· Built in antenna.
· Coverage up to 30ft.
· Bluetooth version: V2.0+EDR
· Operating voltage: 3.3V
· Default Baud Rate: 9600,8,1,n.
· Signal coverage: 30ft
· Cable length: 21.5cm
· tem size: 4.3 * 1.6 * 0.7cm
· Weight: 3g
· Commercial Series: Bluetooth module board Series
· With LED indicator light, use 150mA and 3.3V regulation chip.
· With VCC.GND.TXD.RXD foot for the Bluetooth
· Compatible with bluetooth master module».slave module»or master-slave(whole) module.
· Input voltage: 3.3-6V
· Size: 1.55cm*3.98cm
Wireless Bluetooth RF Transceiver «can use master mode» «can use slave mode» It’s HC-05 Bluetooth module Slave and master two in one module. This module can be set to a transmitter or receiver, transmitter could pairing with receiver , receiver and receiver or transmitter and transmitter can’t communication between, receiver could pairing with computers and cell phone bluetooth , when buying, the default for receiver. Use the CSR mainstream Bluetooth chip, Bluetooth V2.0 protocol standards. Module working voltage 3.3 V. Potter default rate of 9600, the user can be set up. The core module size : 28 mm x 15 mm x 2.35 mm. Working current: matching for 30 MA, matching the communication for 8 MA. Dormancy current: no dormancy. Used for GPS navigation system, water and electricity gas meter reading system. With computer and Bluetooth adapter, PDA, seamless connection equipment Commercial Series: Bluetooth module board Series With LED indicator light, use 150mA and 3.3V regulation chip. With VCC.GND.TXD.RXD foot for the Bluetooth With «Re-search» button(ON/OFF/WAKE foot for it , external MCU out/input «High level» can control module to re-search) Compatible with Bluetooth master module «slave module» or master-slave(whole) module. Input voltage: 3.3 -6V Input power supply 3.3~6V, Prohibit more than 7V No «Automatically prevent power supply peversing func», so please correctly connect power supply We advise to install «Bluetooth master module» The «State» is output foot for LED status, when Bluetooth «Unconnected», output «Pulse», when Bluetooth «connected», output «High level», we can determine the states from «MCU»
The HC-05 is a popular bluetooth module which can add two-way (full-duplex) wireless functionality to your projects.
HC-05 Pinout Configuration
| Pin Number | Pin Name | Description |
| 1 | Enable / Key | This pin is used to toggle between Data Mode (set low) and AT command mode (set high). By default it is in Data mode |
| 2 | Vcc | Powers the module. Connect to +5V Supply voltage |
| 3 | Ground | Ground pin of module, connect to system ground. |
| 4 | TX – Transmitter | Transmits Serial Data. Everything received via Bluetooth will be given out by this pin as serial data. |
| 5 | RX – Receiver | Receive Serial Data. Every serial data given to this pin will be broadcasted via Bluetooth |
| 6 | State | The state pin is connected to on board LED, it can be used as a feedback to check if Bluetooth is working properly. |
| 7 | LED | Indicates the status of Module
|
| 8 | Button | Used to control the Key/Enable pin to toggle between Data and command Mode |
HC-05 Default Settings
Default Bluetooth Name: “HC-05”
Default Password: 1234 or 0000
Default Communication: Slave
Default Mode: Data Mode
Data Mode Baud Rate: 9600, 8, N, 1
Command Mode Baud Rate: 38400, 8, N, 1
HC-05 Technical Specifications
- Serial Bluetooth module for Arduino and other microcontrollers
- Operating Voltage: 3,3V
- Operating Current: 30mA
- Range: <100m
- Works with Serial communication (USART) and TTL compatible
- Follows IEEE 802.15.1 standardized protocol
- Uses Frequency-Hopping Spread spectrum (FHSS)
- Can operate in Master, Slave or Master/Slave mode
- Can be easily interfaced with Laptop or Mobile phones with Bluetooth
- Supported baud rate: 9600,19200,38400,57600,115200,230400,460800.
HC-05 Equivalent Bluetooth Module
HC-02
Other Bluetooth Modules
HC-04, HC-06, HM-11, ESP32, CSR8645
Where to use HC-05 Bluetooth module
The HC-05 is a popular module which can add two-way (full-duplex) wireless functionality to your projects. You can use this module to communicate between two microcontrollers like Arduino or communicate with any device with Bluetooth functionality like a Phone or Laptop. There are many android applications that are already available which makes this process a lot easier. The module communicates with the help of USART at 9600 baud rate hence it is easy to interface with any microcontroller that supports USART. We can also configure the default values of the module by using the command mode. So if you looking for a Wireless module that could transfer data from your computer or mobile phone to microcontroller or vice versa then this module might be the right choice for you. However do not expect this module to transfer multimedia like photos or songs; you might have to look into the CSR8645 module for that.
How to Use the HC-05 Bluetooth module
The HC-05 has two operating modes, one is the Data mode in which it can send and receive data from other Bluetooth devices and the other is the AT Command mode where the default device settings can be changed. We can operate the device in either of these two modes by using the key pin as explained in the pin description.
It is very easy to pair the HC-05 module with microcontrollers because it operates using the Serial Port Protocol (SPP). Simply power the module with +5V and connect the Rx pin of the module to the Tx of MCU and Tx pin of module to Rx of MCU as shown in the figure below
During power up the key pin can be grounded to enter into Command mode, if left free it will by default enter into the data mode. As soon as the module is powered you should be able to discover the Bluetooth device as “HC-05” then connect with it using the default password 1234 and start communicating with it. The name password and other default parameters can be changed by entering into the
Applications
1. Wireless communication between two microcontrollers
2. Communicate with Laptop, Desktops and mobile phones
3. Data Logging application
4. Consumer applications
5. Wireless Robots
6. Home Automation
2D Model
