HC-06 pinout and specifications

HC-06 Pinout, specifications, datasheet and Arduino connection

The HC-06 is a class-2 slave Bluetooth module designed to enable wireless serial communication between microcontroller (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 module may have 6 pins. But only 4 of them are used.

HC-06 Pinout
HC-06 Pinout

 

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 microcontroller (like Arduino) and other Bluetooth enabled devices.

HC-06 Bluetooth Module
HC-06 Bluetooth Module

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:

HC-06 Breakout Board pinout
HC-06 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

HC-06 Arduino Connections
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

 

HC-06 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.

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