Bluetooth-Serial Adapter for DIY projects with both master and slave functions

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Delivery weight: 5 g


This HC-05 Serial-to-Bluetooth module can act as both slave and master (2-in-1) in a standard 2.0V Bluetooth communication.

The HC-05 Module can be set via AT commands to be the one managing the connection protocol (Master) or the one to pair with another module (Slave), such that it can transmit and receive data over Bluetooth connection.

This module could pair with computers, smart-phones or tablets Bluetooth when set as a slave (default settings), while it can be used to host a receiver when set as master.



Module Standard Name: HC-05

Core IC: CSR Bluetooth chip V2.0 standard protocol

Core IC Working Voltage: 3.3V

Default Serial Data Rate: 9600 (can be changed via AT commands)

Programming Interface: Serial Tx/Rx

Extra functions: "Re-seach" button (ON/OFF/WAKE)

Pin Numbers: 6

Rated Input Voltage: 3.3~5.5V

Total Board Dimension: 40mm x 18mm x 4mm / 1.6" x 0.7" x 0.16" (L*W*H)



Avoid storing the products in a place at high temperature, high humidity and in Corrosive gases. 

Do not touch the product with water, as this may cause abnormal behavior.


Package Includes:

  • 1 x HC-05 Module

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