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    Arduino Bluetooth Module HC-05 Original CSR Chip Robotics Bangladesh
    • Arduino Bluetooth Module HC-05 Original CSR Chip Robotics Bangladesh
    • Arduino Bluetooth Module HC-05 Original CSR Chip Robotics Bangladesh
    • Arduino Bluetooth Module HC-05 Original CSR Chip Robotics Bangladesh
    • Arduino Bluetooth Module HC-05 Original CSR Chip Robotics Bangladesh
    • Arduino Bluetooth Module HC-05 Original CSR Chip Robotics Bangladesh
    • Arduino Bluetooth Module HC-05 Original CSR Chip Robotics Bangladesh
    • Arduino Bluetooth Module HC-05 Original CSR Chip Robotics Bangladesh
    • Arduino Bluetooth Module HC-05 Original CSR Chip Robotics Bangladesh

    Arduino Bluetooth Module HC-05 Original CSR Chip

    RBD-3431

    • Original CSR BC417 Chipset for high-performance and stable Bluetooth communication.
    • Supports Both Master and Slave Modes – fully configurable via AT commands.
    • Bluetooth 2.0 + EDR Protocol for fast data transfer and low power consumption.
    • Wide Compatibility: Works with Arduino, Raspberry Pi, ESP32, STM32, and more.
    • 6-Pin Interface with Built-in 3.3V Regulator – easy integration into embedded systems.
    • Reliable Wireless Range: Up to 10 meters in open space with onboard status LED indicators.

    This Bluetooth module has the original CSR Chip 

    BDT 785
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    Description

    The HC-05 Bluetooth Module (6 Pin) with Original CSR Chip is a premium wireless communication solution for serial data transfer between microcontrollers and Bluetooth-enabled devices. Featuring the genuine Cambridge Silicon Radio (CSR) BC417 chipset, this module ensures stable, fast, and secure communication, supporting Bluetooth 2.0 + EDR standards. Unlike clone modules, the original HC-05 supports full AT command functionality, and can operate in both Master and Slave modes, making it a versatile choice for advanced Bluetooth applications. Whether you're building Arduino-based automation, wireless sensor networks, or remote-controlled systems, the HC-05 delivers superior compatibility, long-range stability, and reliable performance. Ideal for developers seeking dependable Bluetooth connectivity in embedded systems. Featured By RoboticsBD.

    Product Images are shown for illustrative purposes only and may differ from the actual product.

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    Features:

    1. Powered by Original CSR BC417 Chip – ensures authenticity, better range, and full AT command support.

    2. Dual Mode Support (Master/Slave) – fully configurable for dynamic communication roles.

    3. Bluetooth 2.0 + EDR Support – low energy consumption with high-speed data transmission.

    4. Wide Operating Voltage (3.3V to 6V) – includes onboard regulator for easy interfacing with microcontrollers.

    5. 6-Pin UART Interface: VCC, GND, TXD, RXD, KEY, STATE for flexible integration and debugging.

    6. Stable Wireless Communication – up to 10 meters range in open environments.

    7. LED Indicators for Bluetooth power and connection status.

    8. Compact and Durable Design suitable for embedded and mobile systems.

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    Applications:

    1. Arduino and Raspberry Pi Wireless Projects for sensor data or control signals.

    2. Bluetooth Remote Control Systems for robotics, relays, or home automation.

    3. Wireless Serial Communication between microcontrollers and PCs or smartphones.

    4. IoT Projects requiring Bluetooth data acquisition and control.

    5. Home Automation Systems involving Bluetooth-based inputs and outputs.

    6. Wireless Programming or Debugging of embedded devices.

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    General Specifications
    ChipsetCSR BC417 Original
    Bluetooth Versionv2.0 + EDR
    Frequency Band2.4GHz ISM
    Operating Voltage3.3V – 6V (with onboard regulator)
    Communication InterfaceUART Serial
    Default Baud Rate9600 bps (configurable via AT commands)
    ModesMaster and Slave
    Communication RangeUp to 10 meters (open space)
    PinoutVCC, GND, TXD, RXD, KEY, STATE
    LED IndicatorsPower and pairing status
    CompatibilityArduino, Raspberry Pi, ESP32, STM32
    DimensionsCompact 6-pin module
    Shipment Weight0.0047 kg
    Shipment Dimensions6 × 4 × 3 cm

    Please allow 5% measuring deviation due to manual measurement.

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    Documentation:

    Original CSR Chip vs Clone – What’s the Difference?

    One of the easiest ways to spot the difference between an original HC-05 module and a clone lies in the Bluetooth chip size and quality.

    The original HC-05 uses a genuine CSR chip, which is slightly larger and provides more reliable Bluetooth communication, better range, and full AT command support.

    Clone versions often come with smaller, unbranded chips, even falsely labeled as "CSR". These clones may lack proper protocol support, have limited AT commands, and exhibit unstable or slow connections.

    Why Choose the Original HC-05?

    1. Backed by a reliable CSR chipset

    2. Better signal stability and communication range

    3. Compact and easy to integrate into projects

    4. Ideal for Arduino and microcontroller applications

    5. Full support for configuration and firmware upgrades

    CSR Chip vs Clone (Chip Differences)

    FeatureCSR Chip (Genuine)Clone CSR Chip (Chinese or non-genuine)
    ChipsetOriginal CSR (Cambridge Silicon Radio) UK chipCopy or alternative low-cost chipset
    StabilityHigh – better signal strength, less dropoutLower – occasional pairing issues or dropouts
    AT Command ReliabilityFully supported and well-documentedSometimes inconsistent AT command behavior
    Firmware UpgradabilityOften upgradeableOften locked or unreliable firmware
    PriceSlightly higherCheaper

    Summary of Bluetooth Modules available in RoboticsBD

    Module NameHC TypeChip QualityKey Notes
    1. HC-05 CSR ChipHC-05Generic CSRMay be reliable if true CSR, but unverified origin
    2. HC-05 Genuine CSR ChipHC-05GenuineBest quality among HC-05, fully supports Master/Slave
    3. HC-05 Clone CSR ChipHC-05CloneMight face instability, but works for basic use
    4. HC-06 CSR ChipHC-06Generic CSRSlave only, check CSR chip authenticity
    5. HC-06 Genuine CSR ChipHC-06GenuineBest among HC-06, reliable slave communication
    6. HC-06 Clone CSR ChipHC-06CloneBasic functionality, lower reliability
    Which Should You Use?

    For advanced control (Master/Slave, Arduino to Arduino):

    → HC-05 Genuine CSR Chip

    For simple, reliable communication (e.g., Arduino to Android):

    → HC-06 Genuine CSR Chip

    For budget or experiments:

    → Clone modules are fine, but test each thoroughly.

    Package Includes:

    1 x Arduino Bluetooth Module HC-05 Original CSR Chip

    Product Details
    RBD-3431
    26 Items

    Specific References

    EAN13
    3431
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    Reference: RBD-0439

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    Reference: RBD-3432

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    Reference: RBD-1928

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    Reference: RBD-1773

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