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Technical Documents

HC-05 Bluetooth Module Datasheet (CSR BC417 Based)

Application Resources

HC-05 with Arduino Connection Bluetooth Module Appnotes

EMC-00004-A

(Last updated) Jun 16, 2026

Bluetooth Module

HC-05 Bluetooth Module

Subcategory
EMC - Communication

Description

The HC-05 Bluetooth Module is a 6-pin wireless communication device used for UART-based data transfer between microcontrollers and Bluetooth-enabled devices. Operating in the 2.4GHz ISM band with GFSK modulation, it supports both Master and Slave modes. Featuring AT command configuration and an onboard push button for AT mode access, it is ideal for wireless control, automation, and IoT projects.

Manufacturer Details

Manufacturer Part Number
HC Series / Generic Compatible CSR BC417
Waveshare HC-05
KEYESTUDIO KS0387
SunFounder HC-05

Technical Specifications

Operating Voltage 3.6V – 6V DC
Input Current 50 mA
Operating Frequency 2.4 GHz ISM Band
Modulation Type GFSK (Gaussian Frequency Shift Keying)
Emission Power 4 dBm (Class 2)
Receiver Sensitivity -84 dBm at 0.1% BER
Maximum Range 10 meters (typical)
Interface Pins EN/KEY, VCC, GND, TXD, RXD, STATE
AT Command Support Yes
Onboard Button Yes (AT Mode Selection)
Length (mm) 43
Width (mm) 16.5
Height (mm) 7
Weight (g) 5
Shipping Weight 0.01 kg
Shipping Dimensions (cm) 5 × 3 × 1

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