---
product_id: 44165400
title: "HiLetgo HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino"
brand: "hiletgo"
price: "₩30222"
currency: KRW
in_stock: true
reviews_count: 13
category: "Hi Letgo"
url: https://www.desertcart.kr/products/44165400-hiletgo-hc-05-wireless-bluetooth-rf-transceiver-master-slave-integrated
store_origin: KR
region: South Korea
---

# 3.6-6V power input 10m+ wireless range Master/Slave dual mode HiLetgo HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino

**Brand:** hiletgo
**Price:** ₩30222
**Availability:** ✅ In Stock

## Summary

> 🚀 Unlock wireless mastery with HC-05 — your Arduino’s Bluetooth game-changer!

## Quick Answers

- **What is this?** HiLetgo HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino by hiletgo
- **How much does it cost?** ₩30222 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/44165400-hiletgo-hc-05-wireless-bluetooth-rf-transceiver-master-slave-integrated)

## Best For

- hiletgo enthusiasts

## Why This Product

- Trusted hiletgo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Reliable 10m+ Range:** Maintain stable wireless communication over 10 meters in open spaces — freedom to innovate without limits.
- • **Compact & Lightweight:** Slim 37.3x15.5mm PCB and featherlight 3.5g design fit perfectly into any DIY or professional setup.
- • **Dual Mode Flexibility:** Switch between master and slave modes to connect with a wide range of Bluetooth 2.0 devices — total control in your hands.
- • **Seamless Bluetooth Integration:** Effortlessly add wireless control to your Arduino projects with HC-05’s plug-and-play serial communication.
- • **Easy Configuration with AT Mode:** Enter AT command mode via a simple button press to customize baud rate, device name, and pairing password — no complex coding needed.

## Overview

The HiLetgo HC-05 is a versatile Bluetooth 2.0 RF transceiver module designed for Arduino projects, featuring master/slave dual mode, a compact 37.3x15.5mm PCB, and a reliable 10-meter wireless range. Operating at 3.6-6V with a default 9600 baud rate and easy AT command configuration, it enables seamless serial port communication for wireless control of gadgets. Ideal for makers and professionals seeking robust Bluetooth integration with minimal hassle.

## Description

Module parameters: 1.PCB Size: 37.3mm (Long) *15.5mm (wide) 2. Weight: 3.5g 3. Input voltage: 3.6V--6V, prohibit exceeding 7V 4. Leads 6 feet: EN/VCC/GND/RXD/TXD/STATE (Bluetooth state leads, not connected output low level, the output high level after connection) 5. With the connection status indicator, LED flash indicates no Bluetooth connection; Led slow flash indicates enter at command mode 6. On-board 3.3V voltage regulator chip, input voltage DC 3.6V-6V; When not paired, current about 30mA (due to LED lights flashing, current in the state of change); After the pairing succeeds, the current is about 10mA 7. Effective transmission distance of 10 meters in open area, more than 10 meters is possible, but not to ensure the quality of the connection 8. After pairing succeeds, can be used as full duplex serial port. No need to understand any Bluetooth protocol, but only support 8-bit data bits, 1-bit stop bits, no parity communication format. This is also the most commonly used communication format, does not support other formats! 9. Press the key and then power up the Bluetooth module to enter at mode, set parameters and query information 10. Can switch host and machine mode from at command 11. The module default baud rate is 9600, the default pairing password is 1234, the default name is HC-05 Wiring method: VCC: Connect the power supply positive GND: Connecting the cathode RXD: The receiver, the Bluetooth module receives data from other devices, and the sending end TXD of the other devices normally TXD: Send end, Bluetooth module sends data to other equipment; the receiving end RXD of the other equipments normally En: To enable the end, need to enter the at mode when 3.3VNote: this item doesn't works with iOS.Package included: 1* HC-05 6 Pin Wireless Bluetooth RF Transceiver Module Serial BT Module for Arduino

Review: Very good device, but not simple to get it operation correctly. - After searching through the web on how to use the HC-05, I ordered a few for a project. Eventually, I got the project working smoothly on an Arduino Uno. I designed a printed circuit board for a shield and have made several units. All work well. That is the good news. The bad news is it helps to be an electrical engineer with experience in embedded design. The various web sites were helpful, but most had errors. For example, some circuits did not use a level shifter for driving the RxD input or reading from TxD. Some level shifters are wired wrong and the choice of circuit can even slow down the fastest baud rates. Some Arduino Uno baud rates are not good choices because of clock frequency errors. If you run the HC-05 using hardware serial on an Uno, you have to pull the HC-05 out to program the Uno. Other websites either do not seem to understand the two modes of HC-05 operation, or at least they describe the poorly. One mode (power up while holding the button) enables a configuration mode that must be run at 38,400 Baud. After configuration, the other mode (for data transfer) runs at whatever baud rate was selected during configuration. My project actually lets the Uno power up the unit in the configuration mode, checks the configuration, then cycles the power to restart in the data transfer mode. Don't reconfigure the device every time you use it. That will probably burn out the nonvolatile memory that holds the parameters. Finally, Bluetooth itself can be tricky. I found that Windows 7 and Windows 10 can be finicky about connecting and disconnection with a Bluetooth device. Good luck with your project. It may take some effort to get everything working. So far, the modules, themselves, have all worked properly once I got the hardware and software designed properly.
Review: Buy this type of module please - A little rant coming up. In short, if you're thinking about this, then buy it. It works perfectly, and it's a great price. IF you were thinking of buying a different type of module, however, be careful. One module that is *flaming hot garbage is the AT-09, AKA MLT BT05 or the 4.1 BTE module. You can search online for a manual (one has been translated from mandarin, but you need to spend a while trying to find it) , and it will show ̶h̶o̶w̶ ̶its ̶s̶u̶p̶p̶o̶s̶e̶d̶ ̶t̶o̶ ̶w̶o̶r̶k̶ pinouts with confusing terminology. You'll be lucky setting it up and getting it into "AT" mode, a necessary step to getting it to function properly. I haven't tried other module types, but I wouldn't doubt that there are others like the AT-09 , so I can't stress enough to be careful that you aren't buying a malfunctioning module, or a notoriously bad module type like that of the AT-09 MLT BT05 4.1 BTE Thanks for your time

## Features

- The factory setting is slave mode, but you can set this module to master mode so that you might be able to connect to other Bluetooth 2.0 devices.HC-05 Wireless BT Module
- HC-05 Wireless BT Module: with this HC 05 Bluetooth module,You can quickly add the Bluetooth feature to your Arduino project, and then you can use your android phone to control some gadgets, such as: switch, LED.
- Master and Slave 2-IN-1 HC 05 Module:Working Voltage 3.6V to 6V , Default baud rate:9600,Default pin:1234
- Button: Press the button, the module enter the AT mode. AT commands are executed only in AT mode.
- 6 PIN Dopunt Cable : with this Dupont Cable, you can easily connect this HC-05 Bluetooth module to your Arduino Board

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B071YJG8DR |
| Best Sellers Rank | #93 in Bluetooth Network Adapters |
| Brand | HiLetgo |
| Color | 1pc |
| Compatible Devices | Desktop |
| Customer Reviews | 4.4 out of 5 stars 376 Reviews |
| Data Link Protocol | Bluetooth |
| Hardware Interface | Bluetooth |
| Item Weight | 3.5 Grams |
| Manufacturer | HiLetgo |

## Product Details

- **Brand:** HiLetgo
- **Color:** 1pc
- **Compatible Devices:** Desktop
- **Data Link Protocol:** Bluetooth
- **Hardware Interface:** Bluetooth
- **Item Weight:** 3.5 Grams
- **Manufacturer:** HiLetgo

## Images

![HiLetgo HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino - Image 1](https://m.media-amazon.com/images/I/612hL4s+zxL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very good device, but not simple to get it operation correctly.
*by T***R on March 10, 2019*

After searching through the web on how to use the HC-05, I ordered a few for a project. Eventually, I got the project working smoothly on an Arduino Uno. I designed a printed circuit board for a shield and have made several units. All work well. That is the good news. The bad news is it helps to be an electrical engineer with experience in embedded design. The various web sites were helpful, but most had errors. For example, some circuits did not use a level shifter for driving the RxD input or reading from TxD. Some level shifters are wired wrong and the choice of circuit can even slow down the fastest baud rates. Some Arduino Uno baud rates are not good choices because of clock frequency errors. If you run the HC-05 using hardware serial on an Uno, you have to pull the HC-05 out to program the Uno. Other websites either do not seem to understand the two modes of HC-05 operation, or at least they describe the poorly. One mode (power up while holding the button) enables a configuration mode that must be run at 38,400 Baud. After configuration, the other mode (for data transfer) runs at whatever baud rate was selected during configuration. My project actually lets the Uno power up the unit in the configuration mode, checks the configuration, then cycles the power to restart in the data transfer mode. Don't reconfigure the device every time you use it. That will probably burn out the nonvolatile memory that holds the parameters. Finally, Bluetooth itself can be tricky. I found that Windows 7 and Windows 10 can be finicky about connecting and disconnection with a Bluetooth device. Good luck with your project. It may take some effort to get everything working. So far, the modules, themselves, have all worked properly once I got the hardware and software designed properly.

### ⭐⭐⭐⭐⭐ Buy this type of module please
*by Z***R on April 21, 2020*

A little rant coming up. In short, if you're thinking about this, then buy it. It works perfectly, and it's a great price. IF you were thinking of buying a different type of module, however, be careful. One module that is *flaming hot garbage is the AT-09, AKA MLT BT05 or the 4.1 BTE module. You can search online for a manual (one has been translated from mandarin, but you need to spend a while trying to find it) , and it will show ̶h̶o̶w̶ ̶its ̶s̶u̶p̶p̶o̶s̶e̶d̶ ̶t̶o̶ ̶w̶o̶r̶k̶ pinouts with confusing terminology. You'll be lucky setting it up and getting it into "AT" mode, a necessary step to getting it to function properly. I haven't tried other module types, but I wouldn't doubt that there are others like the AT-09 , so I can't stress enough to be careful that you aren't buying a malfunctioning module, or a notoriously bad module type like that of the AT-09 MLT BT05 4.1 BTE Thanks for your time

### ⭐⭐⭐⭐⭐ Initial hiccup but later on smooth ride
*by G***. on June 19, 2021*

Initially I was not able to follow how to use and did reach out to the tech support and they respond back on time, I just felt like using this little fellow is complicated but then I took step back and tried to look at each pin and setup and whoolaaaaa, it worked. No register nothing but simple connect to the pins. ohh and yes, this one didn't work with SoftwareSerial but worked with AltSoftSerial. I am fine with that but just thought to share in case if anyone gets in to the situation.

## Frequently Bought Together

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-18*