HC-05 Bluetooth Module
HC-05 Bluetooth Module
HC-05 Bluetooth Module
The HC-05 is a versatile Bluetooth SPP (Serial Port Protocol) module designed for seamless wireless serial communication. Operating on the standard Bluetooth v2.0+EDR protocol, this module supports both master and slave modes, making it ideal for two-way wireless data transfer between microcontrollers, Arduino boards, Raspberry Pi, and other embedded systems. Available now at The Tech Depot, Bengaluru, with fast shipping and full technical support.
Specifications
| Module | HC-05 Bluetooth Serial Transceiver |
| Bluetooth Version | v2.0 + EDR (Enhanced Data Rate) |
| Operating Frequency | 2.4 GHz ISM Band |
| Communication Protocol | UART / Serial (SPP - Serial Port Profile) |
| Operating Mode | Master / Slave (Configurable via AT Commands) |
| Default Baud Rate | 9600 bps (Configurable: 1200 to 1382400 bps) |
| Operating Voltage | 3.3V - 6V DC (On-board 3.3V regulator on breakout board) |
| Logic Level | 3.3V (5V tolerant on most breakout boards) |
| Operating Current | 30-40 mA (Paired/Communicating) |
| Standby Current | ~8 mA |
| Transmission Range | Up to 10 meters (Class 2, open space) |
| Transmit Power | +4 dBm (Class 2) |
| Sensitivity | -80 dBm (Typical) |
| Antenna | On-board PCB trace antenna |
| Interface Pins | VCC, GND, TXD, RXD, STATE, EN (KEY) |
| Default Pairing Code | 1234 (or 0000, configurable) |
| Default Device Name | HC-05 (Configurable via AT Commands) |
| Supported Profiles | SPP (Serial Port Profile) |
| Modulation | GFSK (Gaussian Frequency Shift Keying) |
| Chipset | CSR BC417 (Cambridge Silicon Radio) |
| LED Indicator | On-board (Fast blink = searching, Slow blink = paired/connected) |
| Operating Temperature | -20 degreesC to +75 degreesC |
| Board Dimensions | Approx. 37mm x 16mm (breakout board: ~44mm x 16mm) |
| Weight | ~5-8 grams |
| Compatibility | Arduino, ESP32, STM32, Raspberry Pi, PIC, 8051, and other UART-enabled devices |
| Origin | Original / Authentic |
| Warranty | 7-day warranty on manufacturing defects |
| Support | Email & WhatsApp 24/7 |
Pin Configuration
| VCC | Power supply input (3.3V - 6V DC). The breakout board includes a voltage regulator, so 5V from Arduino works directly. |
| GND | Ground connection. Connect to system ground. |
| TXD | Transmit data pin. Connect to RX of your microcontroller. Outputs serial data at 3.3V logic. |
| RXD | Receive data pin. Connect to TX of your microcontroller. Accepts 3.3V logic (use voltage divider if using 5V MCU for safety). |
| STATE | Status output pin. Goes HIGH when the module is connected/paired with another device. |
| EN (KEY) | Enable/AT Command mode pin. Pull HIGH (3.3V) before powering on to enter AT command mode at 38400 baud. |
Why Choose the HC-05 Bluetooth Module?
- Master & Slave Modes: Unlike the HC-06 (slave only), the HC-05 can operate as both master and slave, enabling Bluetooth-to-Bluetooth module communication without a phone or computer.
- AT Command Configuration: Full control over device name, pairing password, baud rate, operating mode, and more through simple AT commands.
- Plug-and-Play with Arduino: Connect VCC, GND, TX, and RX - upload a simple serial sketch, and you're wirelessly communicating in minutes.
- Reliable 10m Range: Class 2 Bluetooth provides stable
Frequently Asked Questions
When will I receive my order?
Products ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.
Is technical support available?
Yes, 24/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.
What is your return policy?
7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Buy HC-05 Bluetooth Module Online in India
Purchase the HC-05 Bluetooth Module online at The Tech Depot - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on HC-05 Bluetooth Module with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.
Looking to buy HC-05 Bluetooth Module at the best price in India? The Tech Depot offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.