HC-05

Bluetooth to Serial Port Module

The HC-05 is a bluetooth to serial port module. View the full HC-05 datasheet below including key specifications.

Official HC-05 datasheet (PDF) — the source this page was extracted from.

HC-05 Key Specifications

Parameter	Value
Antenna	Integrated
Chipset	CSR BlueCore 04-External
I/O Voltage	1.8V to 3.6V
Default Role	Slave
Frequency Band	2.4GHz
Default PIN Code	1234 (auto-pairing PINCODE '0000' stated in software features)
Bluetooth Version	V2.0+EDR (3Mbps modulation)
Default Baud Rate	38400 (8 data bits, 1 stop bit, no parity)
Frequency Hopping	AFH (Adaptive Frequency Hopping)
Module Dimensions	12.7mm x 27mm
Operating Voltage	1.8V (low power operation)
RF Transmit Power	up to +4dBm
Receiver Sensitivity	-80dBm (typical)
Supported Baud Rates	9600, 19200, 38400, 57600, 115200, 230400, 460800
Communication Interface	UART

HC-05 Overview

Part: HC-05

Type: Bluetooth to Serial Port Module

Description: An easy-to-use Bluetooth SPP (Serial Port Protocol) module designed for transparent wireless serial connection setup, featuring Bluetooth V2.0+EDR 3Mbps modulation and a UART interface.

Operating Conditions:

Supply voltage: 1.8 to 3.6V I/O
RF transmit power: Up to +4dBm

Absolute Maximum Ratings:

Key Specs:

Bluetooth standard: V2.0+EDR (Enhanced Data Rate)
Modulation: 3Mbps
Sensitivity: Typical -80dBm
Default Baud rate: 38400 bps
Supported Baud rates: 9600, 19200, 38400, 57600, 115200, 230400, 460800 bps
Default PINCODE: '0000' (Auto-pairing)
Auto-reconnect time: 30 min (when disconnected due to range)

Features:

Transparent wireless serial connection
CSR Bluecore 04-External single chip Bluetooth system
AFH (Adaptive Frequency Hopping Feature)
PIO control
Integrated antenna
Edge connector
Auto-connect to the last device on power
Permit pairing device to connect
Master/Slave mode configurable via AT commands

Applications:

Transparent wireless serial connection setup

Package:

Module footprint: 12.7mm x 27mm

HC-05 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

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All RF / Wireless datasheets

Data on this page is extracted from publicly available manufacturer datasheets using automated tools including AI. It may contain errors or omissions. Always verify specifications against the official manufacturer datasheet before making design or purchasing decisions. See our Terms of Service. Rights holders can submit a takedown request.

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