Last updated on March 26th, 2024 at 05:54 pm
The HC-06 is a class-2 slave Bluetooth module designed to enable wireless serial communication between microcontrollers (like Arduino) and other Bluetooth-enabled devices. HC-06 pinout and specifications are given below.
HC-06 pinout with description
HC06 is a slave Bluetooth device that offers serial communication (UART). Hence, a master is required to establish a successful wireless interface. The module has only communication and power pins. Please note that some HC-06 modules may have 6 pins. But only 4 of them are used.
| PIN NO. | Pin Name | Description |
| 1. | VCC | Used to power the module. Connect it to a 3.3V pin of the microcontroller. |
| 2. | GND | Connect this pin to the common ground of the circuit. |
| 3. | TXD | Connect this pin with the RXD pin of the Microcontroller. This pin transmits Serial data (wireless signals received by the Bluetooth module are converted by module and transmitted out serially on this pin) |
| 4. | RXD | Connect this pin to the TXD pin of the Microcontroller. The HC-05 Bluetooth module receives the data from this pin and then transmits it wirelessly. |
HC-06 specifications
- Bluetooth protocol: Bluetooth 2.0+ EDR standard
- USB protocol: USB v1.1/2.0
- Operating frequency: 2.4GHz ISM frequency band
- Modulation mode: Gauss Frequency Shift Keying
- Transmit power: ≤ 4dBm
- Sensitivity: ≤-84dBm at 0.1% Bit Error Rate
- Transmission speed: 2.1Mbps(Max)/160 kbps(Asynchronous)； 1Mbps/1Mbps(Synchronous)
- Safety feature: Authentication and encryption
- Supported configuration: Bluetooth serial port (major and minor)
- Supply Voltage: +3.3 VDC 50mA
- Operating temperature: -20 to 55℃
- Size: 36.5*16mm
- Weight: 4g
**HC-05 Pinout and specifications
HC-06 bluetooth module datasheet
Download the full datasheet from this link: HC-06 Datasheet
Introduction to HC-06 bluetooth module
The HC-06 is a class-2 slave Bluetooth module. It is designed to enable wireless serial communication between microcontrollers (like Arduino) and other Bluetooth-enabled devices.
All data received through the serial input is immediately transmitted wirelessly by the module. And when the module receives some wireless data from the master device (like a smartphone ), this data is sent out through the serial interface.
The HC-06 operating voltage is between 3.3V to 5V. However, the tolerance level of RXD pin is 3.3V and not 5V. Hence, a Logic Level Converter is recommended to convert the 5v input to 3.3V.
HC-05 Breakout board pinout
PIN Name PIN Pad type Description GND 13 21 22 VSS Ground pot 1V8 14 VDD Integrated 1.8V (+) supply with an on-chip linear regulator output within the range of 1.7V-1.9V VCC 12 3.3V AIO0 9 Bi-Directional Programmable input/output line AIO1 10 Bi-Directional Programmable input/output line PIO0 23 Bi-Directional RX EN Programmable input/output line, control output for LNA(if fitted) PIO1 24 Bi-Directional TX EN Programmable input/output line, control output for PA(if fitted) PIO2 25 Bi-Directional Programmable input/output line PIO3 26 Bi-Directional Programmable input/output line PIO4 27 Bi-Directional Programmable input/output line PIO5 28 Bi-Directional Programmable input/output line PIO6 29 Bi-Directional Programmable input/output line CLK_REQ PIO7 30 Bi-Directional Programmable input/output line CLK_OUT PIO8 31 Bi-Directional Programmable input/output line PIO9 32 Bi-Directional Programmable input/output line PIO10 33 Bi-Directional Programmable input/output line PIO11 34 Bi-Directional Programmable input/output line RESET 11 CMOS (Complementary-metal-oxide-semiconductor) Input with weak internal pull-down UART_RTS 4 CMOS (Complementary metal-oxide-semiconductor) output, tri-stable with weak internal pull-up UART request to send, active low UART_CTS 3 CMOS input with weak internal pull-down UART clear to send, active low UART_RX 2 CMOS (Complementary metal-oxide-semiconductor) input with weak internal pull-down UART Data input UART_TX 1 CMOS output, Tri-stable with weak internal pull-up UART Data output SPI_MOSI 17 CMOS input with weak internal pull-down Serial peripheral interface data input SPI_CSB 16 CMOS input with weak internal pull-up The chip select for the serial peripheral interface, active zero SPI_CLK 19 CMOS input with weak internal pull-down The serial peripheral interface clock SPI_MISO 18 CMOS input with weak internal pull-down Serial peripheral interface data Output USB_- 15 Bi-Directional USB_+ 20 Bi-Directional 1.8V 14 1.8V external power supply input PCM_CLK 5 Bi-Directional PCM_OUT 6 CMOS output PCM_IN 7 CMOS Input PCM_SYNC 8 Bi-Directional
HC-06 Arduino connections
Image Source: Hackster
In this project, an LED is controlled using a smartphone via Bluetooth. HC-06 Bluetooth module receives the commands from the smartphone via Bluetooth signals. These commands are then processed by the Arduino UNO to control the LED connected to one of its digital I/O pins.
**For full project details, click here: Control LED with Bluetooth
Applications
- HC-06 is a class Bluetooth module, that can be used in different electronic devices such as a mobile, laptop, personal computer, etc.
- It can also be used in different industrial projects for sending and receiving data.
- Different robotics projects.
- Mobile phone wireless accessories.
Read a similar article on HC-05 Bluetooth Module:
HC-05 pinout, specifications, datasheet, and Arduino Connections.
