Serial Port Bluetooth Module (Master/Slave) : HC-05

Overview

HC-05 module is an easy to use Bluetooth SPP (Serial Port Protocol) module, designed for transparent wireless serial connection setup.

Serial port Bluetooth module is fully qualified Bluetooth V2.0+EDR (Enhanced Data Rate) 3Mbps Modulation with complete 2.4GHz radio transceiver and baseband. It uses CSR Bluecore 04-External single chip Bluetooth system with CMOS technology and with AFH(Adaptive Frequency Hopping Feature). It has the footprint as small as 12.7mmx27mm. Hope it will simplify your overall design/development cycle.

Specifications

Hardware Features

• Typical -80dBm sensitivity
• Up to +4dBm RF transmit power
• Low Power 1.8V Operation ,1.8 to 3.6V I/O
• PIO control
• UART interface with programmable baud rate
• With integrated antenna
• With edge connector

Software Features

• Default Baud rate: 38400, Data bits:8, Stop bit:1,Parity:No parity, Data control: has.

Supported baud rate: 9600,19200,38400,57600,115200,230400,460800.

• Given a rising pulse in PIO0, device will be disconnected.
• Status instruction port PIO1: low-disconnected, high-connected;
• PIO10 and PIO11 can be connected to red and blue led separately. When master and slave

are paired, red and blue led blinks 1time/2s in interval, while disconnected only blue led blinks 2times/s.

• Auto-connect to the last device on power as default.
• Permit pairing device to connect as default.
• Auto-pairing PINCODE:”0000” as default
• Auto-reconnect in 30 min when disconnected as a result of beyond the range of connection.

Hardware

PIN Name	PIN #	PAD Type	Description	Note
GND	13,21,22	VSS	Ground Pot
3.3 VCC	12	3.3V	Integrated 3.3V(+) supply with On-chip linear regulator output within 3.15-3.3V
AIO0	9	Bi-directional	Programmable input/output line
AIO1	10	Bi-directional	Programmable input/output line
AIO0	23	Bi-directional RX EN	Programmable input/output line, control output for LNA (if fitted)
AIO1	24	Bi-directional TX EN	Programmable input/output line, control output for PA (if fitted)

PIN Name	PIN #	PAD Type	Description	Note
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
PIO7	30	Bi-directional	Programmable input/output line
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

PIN Name	PIN #	PAD Type	Description	Note
RESETB	11	CMOS input with weak internal pull-up	Reset of low.input debouncde so must be low for >5MS to cause a reset
UART_RTS	4	CMOS 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 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

PIN Name	PIN #	PAD Type	Description	Note
SPI_CSB	16	CMOS input with weak internal pull-up	Chip select for serial peripheral interface, active low
SPI_CLK	19	CMOS input with weak internal pull-down	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
NC	14
PCM_CLK	5	Bi-directional	Synchronous PCM data clock
PCM_OUT	6	CMOS output	Synchronous PCM data output
PCM_IN	7	CMOS input	Synchronous PCM data input
PCM_SYNC	8	Bi-directional	Synchronous PCM data strobe