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Reference: RBD-1354
Length: 8 inches/20 CM (Long) Material: Copper Plated Pin Spacing: 2.54mm.
Reference: RBD-0351
Contactless transmission of data and supply energy (no battery needed) Operating distance: Up to 100mm (depending on antenna geometry) RoboticsBD Operating frequency: 13.56MHz Data transfer: 106 kbit/s Data integrity: 16 Bit CRC, parity, bit coding bit counting Anticollision Typical ticketing transaction: <100 ms ( including backup management)...
Reference: 0245
Choose your desire Resistor value from below:
Reference: 0031
3 Types Available (Please select from option) 1. Male to Male 2. Male to Female 3. Female-Female
Reference: RBD-0768
Size: 5mm Color: RED Head Shape: Round Lens Appearance: Transparent
Reference: 1353
Length: 12.5 inches/30 CM (Long) Material: Copper Plated Pin Spacing: 2.54mm.
Reference: RBD-0761
Breadboard friendly Mounting Style: Through Hole Mounting Direction: Vertical
This Bluetooth module has the original CSR Chip
Store Pickup Available!
Free Ship Over 5000 BDT
Quality Product
No Warranty
No Replacement
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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Powered by Original CSR BC417 Chip – ensures authenticity, better range, and full AT command support.
Dual Mode Support (Master/Slave) – fully configurable for dynamic communication roles.
Bluetooth 2.0 + EDR Support – low energy consumption with high-speed data transmission.
Wide Operating Voltage (3.3V to 6V) – includes onboard regulator for easy interfacing with microcontrollers.
6-Pin UART Interface: VCC, GND, TXD, RXD, KEY, STATE for flexible integration and debugging.
Stable Wireless Communication – up to 10 meters range in open environments.
LED Indicators for Bluetooth power and connection status.
Compact and Durable Design suitable for embedded and mobile systems.
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Arduino and Raspberry Pi Wireless Projects for sensor data or control signals.
Bluetooth Remote Control Systems for robotics, relays, or home automation.
Wireless Serial Communication between microcontrollers and PCs or smartphones.
IoT Projects requiring Bluetooth data acquisition and control.
Home Automation Systems involving Bluetooth-based inputs and outputs.
Wireless Programming or Debugging of embedded devices.
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| General Specifications | |
| Chipset | CSR BC417 Original |
| Bluetooth Version | v2.0 + EDR |
| Frequency Band | 2.4GHz ISM |
| Operating Voltage | 3.3V – 6V (with onboard regulator) |
| Communication Interface | UART Serial |
| Default Baud Rate | 9600 bps (configurable via AT commands) |
| Modes | Master and Slave |
| Communication Range | Up to 10 meters (open space) |
| Pinout | VCC, GND, TXD, RXD, KEY, STATE |
| LED Indicators | Power and pairing status |
| Compatibility | Arduino, Raspberry Pi, ESP32, STM32 |
| Dimensions | Compact 6-pin module |
| Shipment Weight | 0.0047 kg |
| Shipment Dimensions | 6 × 4 × 3 cm |
Please allow 5% measuring deviation due to manual measurement.
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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.
Backed by a reliable CSR chipset
Better signal stability and communication range
Compact and easy to integrate into projects
Ideal for Arduino and microcontroller applications
Full support for configuration and firmware upgrades
| Feature | CSR Chip (Genuine) | Clone CSR Chip (Chinese or non-genuine) |
| Chipset | Original CSR (Cambridge Silicon Radio) UK chip | Copy or alternative low-cost chipset |
| Stability | High – better signal strength, less dropout | Lower – occasional pairing issues or dropouts |
| AT Command Reliability | Fully supported and well-documented | Sometimes inconsistent AT command behavior |
| Firmware Upgradability | Often upgradeable | Often locked or unreliable firmware |
| Price | Slightly higher | Cheaper |
| Module Name | HC Type | Chip Quality | Key Notes |
| 1. HC-05 CSR Chip | HC-05 | Generic CSR | May be reliable if true CSR, but unverified origin |
| 2. HC-05 Genuine CSR Chip | HC-05 | Genuine | Best quality among HC-05, fully supports Master/Slave |
| 3. HC-05 Clone CSR Chip | HC-05 | Clone | Might face instability, but works for basic use |
| 4. HC-06 CSR Chip | HC-06 | Generic CSR | Slave only, check CSR chip authenticity |
| 5. HC-06 Genuine CSR Chip | HC-06 | Genuine | Best among HC-06, reliable slave communication |
| 6. HC-06 Clone CSR Chip | HC-06 | Clone | Basic functionality, lower reliability |
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.
1 x Arduino Bluetooth Module HC-05 Original CSR Chip
The latest price of Arduino Bluetooth Module HC-05 Original CSR Chip in Bangladesh is BDT 785 You can buy the Arduino Bluetooth Module HC-05 Original CSR Chip at best price from our RoboticsBD or visit RoboticsBD Office.
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Please note that the product information provided on our website may not be entirely accurate as it is collected from various sources on the web. While we strive to provide the most up-to-date information possible, we cannot guarantee its accuracy. We recommend that you always read the product labels, warnings, and directions before using any product. |
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Product Images are shown for illustrative purposes only and may differ from the actual product. |
Reference: RBD-0439
Bluetooth Protocol: Bluetooth Specification V4.0 BLE USB Protocol: USB V2.0 Operating Frequency: 2.4GHz ISM band Modulation Mode: GFSK (Gaussian Frequency Shift Keying) Transmitting Power: ≤4dBm Sensitivity: ≤-84dBm at 0.1% BER It’s easy to use and completely encapsulated. You can set it as slave or master. You can use AT command set the baud rate....
Reference: RBD-1773
Supply Voltage: 5V USB / 3.7V lithium battery Output Port: 3-wire audio interface/DIY pad Output Type: Analog signal Bluetooth name: VHM-314-V3.0 Bluetooth version: 5.0 Bluetooth passcode: no password Sound source: Bluetooth. USB-PC input(after the back pad is connected, the computer can be connected as a sound card though Micro) Operation method:...
Reference: RBD-1928
Frequency: 2.4GHz ISM. Protocol: BLE 4.0. Max transmitting power: max. 4dBm. Modulation System: GFSK. Serial Baud Rate: 1200 to 115200 bps. Reference Distance: 80 meters.
Reference: RBD-3432
Original CSR BC417 Chipset for stable and reliable Bluetooth communication. Slave Mode Only – ideal for receiving data wirelessly from smartphones or PCs. Supports Bluetooth 2.0 + EDR with Serial Port Profile (SPP) for seamless UART communication. Wide Compatibility: Works with Arduino, Raspberry Pi, ESP32, STM32, and other MCU platforms. Compact Design...
Reference: RBD-2305
WS2812B RGB LED 8-Bit Ring with individually addressable LEDs Features 8 WS2812 5050 RGB LEDs in a compact 32mm outer diameter circular board Constant current drive (~18mA per LED) for consistent brightness at 5V Requires a microcontroller with an 8MHz or faster processor for precise control Equipped with solder pads and mounting holes for easy integration
Reference: RBD-1333
Easy communication with any microcontroller. Tactile type switches. Over 1,000,000 operations per key. Contact rated for 12V dc @ 20mA. Over 1,000,000 operations per key. Dimensions: 56 x 80 x 17 mm.(LxWxH)
Reference: RBD-2102
RGB trichromatic limiting resistor to prevent burnout PWM adjusted color mixing
Reference: RBD-2680
4-way Pacman type arcade joystick. Heavy duty design gives this joystick a great feel! ABS plastic and solid alloy construction Uses 4 microswitches to detect on/off position Unique handle design Spring return to center Very rugged construction Rated 5A @ 125V, 3A @ 250V* Overall height: 101mm Base: 97x65mm Joystick height: 60mm 4-way, large...
Reference: RBD-0103
This is M177 NRF24L01 2.4GHz Antenna Wireless Transceiver Module. The nRF24L01 is a highly integrated, ultra-low power (ULP) 2Mbps RF transceiver IC for the 2.4GHz ISM (Industrial, Scientific, and Medical) band. With peak RX/TX currents lower than 14mA, a sub μA power down mode, advanced power management, and a 1.9 to 3.6V supply range, the nRF24L01...
Reference: RBD-2798
Add another eight pins to your microcontroller using a MCP23008 port expander. The MCP23008 uses two I2C pins which can be shared with other I2C devices, and in exchange gives you eight general purpose pins. You can set each of eight pins to be input, output, or input with a pullup. There's even the ability to get an interrupt via an external pin when any...
Reference: RBD-3414
The 12V 1-Channel Latching Relay Module is a self-locking relay with a touch bistable switch, designed for stable and reliable switching applications. Powered by DC 12V, this relay module features MCU control, making it ideal for home automation, appliance control, factory equipment, and high-voltage power management. With a durable SONGLE relay,...
Reference: RBD-3286
The Serial MP3 Music Player Module V1.3.2 is a compact and easy-to-use audio playback module that supports MP3 and WAV file formats. Designed for seamless integration into microcontroller-based projects, this module enables high-quality audio playback with simple UART TTL serial control. This module is highly compatible with platforms like Arduino,...
Reference: RBD-2496
Brand: DFRobot
Operating Voltage: 3.3 – 5V Maximum Operating Current: ≤370 mA (5V) Communication: I2C/UART I2C Address: 0x64 Fixed Command: 121 Self-learning function
Reference: RBD-0937
SD card interface works with FAT16 or FAT32 formatted cards. 3.3v level shifter circuitry prevents damage to your SD card. Real-time clock (RTC) keeps the time going even when the Arduino is unplugged. The battery backup lasts for years. Included libraries and example code for both SD and RTC mean you can get going quickly Prototyping area for soldering...
Reference: RBD-2415
Dual PS2 Joystick Module: Two joysticks with X and Y axis analog control for versatile input options. Integrated Push-Button Switches: Each joystick includes a built-in push-button for additional input. Arduino Compatible: Seamlessly integrates with Arduino boards for interactive projects. Compact Design: Module dimensions of 65.1x53.8 mm for easy...
Reference: RBD-2761
ICL8038 12V to 15V, Signal Generator, Medium/Low Signal, Frequency 10Hz-450KHz, Triangular/Rectangular/Sine Wave Generator, Module Working voltage: 12V ~ 15V Output: Triangular wave, Square wave and sine wave. Frequency range: 10HZ ~ 450kHz Low distortion sine wave: 1% Duty cycle range: 2% to 98% Low temperature drift: 50ppm / ℃ Triangular wave output...
Reference: RBD-1959
Single supply voltage 3.4V – 4.5V HW-353A SIM900A Module Development Board GSM GPRS The keypad and SPI display interface will give you the flexibility to develop customized applications. Serial port and Debug port can help you easily develop your applications. One audio channel includes a microphone input and a speaker output. Programmable General Purpose...
Reference: RBD-1367
RGB trichromatic limiting resistor to prevent burnout PWM adjusted color mixing Working voltage: 5V LED drive mode: Common cathode driver
Reference: RBD-2092
Product Type: LED Shape: Round LED 5mm DIP type Color: pink yellow-green (high brightness) Lens type: white mist Standard Forward Voltage:3.0-4 .5 V
Reference: RBD-1647
Communication distance: 15KM Sensitivity: down to -148dBm Programmable bit rates: up to 300kbps RSSI dynamic range: 127dB Wireless frequency: 433MHz Working voltage: 1.8-3.7v Working temperature: -40-+80 ℃The range depends on your antenna. If you need a longer range, you need to use a powerful antenna. (Antenna is not included)
Reference: RBD-2340
2-channel PWM pulse frequency and duty cycle adjustable signal generator module Generates square and rectangular waveforms for experiment and development Frequency range: 1Hz to 150KHz, adjustable in three precision levels Features serial port control with customizable PWM settings via commands Compact design (44x30x11mm) with 5–30V DC operating voltage
Reference: RBD-1867
Original TDA7297 core technology Easy Plug and Play Operation Dynamic operating Voltage Range: 8 to 16V High fidelity Dual 15W output.
Reference: RBD-0408
Low Level Trigger Relay Module. RoboticsBD Two separate LEDs for On/Off indication of the Relay. Triggering input voltage 3.3V – 5V Two separate LEDs for On/Off indication of the Relay Triggering input voltage 3.3V – 5V 4) Back EMF protection Back EMF protection 2 LEDs to indicate when relays are ON. Works with logic level signals from 3.3V or 5V devices...
Reference: RBD-3459
The XHM542 High Power Digital Audio Amplifier is a compact and powerful solution designed for delivering exceptional audio clarity and performance. Built around the reliable TPA3116D2 amplifier chip, this module can deliver up to 100W of output power, making it ideal for a wide range of applications requiring clear, powerful, and distortion-free sound.
Reference: RBD-0040
Bluetooth 2.0 Module Based on CSR BC04 Chip – Ideal for reliable wireless communication. Slave Mode Only – Perfect for receiving data from smartphones or other master devices. Wide Operating Voltage (3.3V to 6V) with onboard regulator for easy integration. Built-in 2.4GHz PCB Antenna – Supports wireless range up to 10 meters. Simple UART Interface (VCC,...
Reference: RBD-0397
Support CAN V2.0B technical standard, communication rate 1Mb / S. Module 5V DC power supply, SPI interface protocol control 0 to 8 bytes long data field. 8MHZ crystal oscillator 120Ω terminal resistance Use High-speed CAN transceiver TJA1050 Impedance matching, guaranteed drive capability, long-distance data transmission, prevent signal radiation The...
Reference: RBD-2505
RS232 Bluetooth Serial Adapter Communication Master-Slave Module
Reference: RBD-1399
Operating Voltage: 12V DC Two separate LEDs for On/Off indication of the Relay Triggering input voltage 3.3V – 5V 4) Back EMF protection Equipped with high-current relay 10A@250VAC / 10A@30VDC It can control both AC and DC appliances such as Solenoids, Motors, lights, fans, etc High-quality screw terminals (Terminal Block) provided (C, NC, NO) for quick...
Reference: RBD-2230
Main chip: NE555 Input Voltage: 5V-15V DC. Generate an adjustable pulse for MCU. Generate an adjustable pulse, to control circuitry associated.
Reference: RBD-0383
Wide Supply Range: 2.0v To 5.5v Low Current Consumption Continuous Mode: Only 150µa Single-shot Auto Shut-down Programmable Data Rate: 8SPS to 860SPS It has Internal low-drift voltage reference
Reference: RBD-2741
Module mounts an 8MB serial flash chip for easy use with breadboards.
Reference: RBD-2086
Operating Voltage: 5V Contact Resistance : 50mΩ max (initial) Electrically Life:100,000 cycles Environment temperature: -25°C to +105°C Operating Force: 180/230(±20gf) Seal temperature:250ºC-280ºC I/O pins: 3 pins
Reference: RBD-2659
Trigger Voltage: 5VDC Switching Voltage: 250VAC@30A; 30VDC@30A The module can be set high level or low-level trigger by the jumper Note: Relay brand may vary from actual product as our stock rotates.
Reference: RBD-0922
Dimensions: 91 x 21 x 30 mm(LxWxH) Weight: 18 gm. Voltage: 3.3V or 5V. Port: Analog. Resistance: 10K. Appn: Raspberry-Pi projects. DIY projects., Arduino projects.
Reference: RBD-1390
Nema17 Bipolar. Number of Phases: 2. Step Angle: 1.8°. Phase Voltage: 2.6Vdc. Phase Current: 1.7A. Resistance: 1.5Ω ±10%. Inductance: 2.8mH ±20% (1KHz). Number of Wire: 4 (100cm Length). Holding Torque: 43N.cm. Shaft Diameter: Ø5mm. Motor Length: 40mm. Mass: 270g.
Reference: RBD-1065
Latest Arduino CNC Shield Version 3.10 GRBL 0.9 compatible. (Open source firmware that runs on an Arduino UNO that turns G-code commands into stepper signals) Coolant enable Jumpers to set the Micro-Stepping for the stepper drivers. (Some drivers like the DRV8825 can do up to 1/32 micro-stepping ) Compact design. 4-Axis support (X, Y, Z, A-Can duplicate...
Reference: RBD-0654
Single row. 2.54mm pitch. 1 x 40 pins. Through-hole mount. RoboticsBD
Reference: RBD-1714
KCD1-11 3A 250V AC 6A 125V AC Normal Quality Rocker Switch Button 2Pin ON/OFF KCD Switch Dimension: 13.5mm X 8.5 mm
Reference: RBD-1647
Communication distance: 15KM Sensitivity: down to -148dBm Programmable bit rates: up to 300kbps RSSI dynamic range: 127dB Wireless frequency: 433MHz Working voltage: 1.8-3.7v Working temperature: -40-+80 ℃The range depends on your antenna. If you need a longer range, you need to use a powerful antenna. (Antenna is not included)
Reference: RBD-0212
Input: 110v or 240v A/C (50/60Hz) Cell Count: 2~3s Battery Type: LiPoly Output Current: 3 x 800mA
Reference: RBD-0928
Voltage : 11.1V Constant Discharge : 30C(10.5A) Max discharge : 25C (10 sec) Dimensions : 74 x 34 x 22 (LxWxH)(mm ) Weight : 87 gm Charge Rate : 1-3C Recommended, 5C Max
Reference: RBD-0653
Can be manually broken for the length needed. Connector: Pin Header 2.54mm Pitch Connector type: Pin Strips Male Number of pins: 40 Right angled male berg strip. (L Shaped)
Reference: 1353
Length: 12.5 inches/30 CM (Long) Material: Copper Plated Pin Spacing: 2.54mm.
Reference: RBD-0094
The Arduino Uno R3 High-Quality Edition Arduino UNO in Bangladesh Micro-controller : ATmega328. Operating Voltage : 5V. Input Voltage (recommended) : 7-12V. Digital I/O Pins : 14 (of which 6 provide PWM output). Analog Input Pins : 6. The Arduino Uno R3 High-Quality Edition embodies superior craftsmanship and meticulous attention to detail, resulting in...
Reference: RBD-0376
Current Sense for each motor. RoboticsBD Heatsink for better performance. Power-On LED indicator. Double H bridge Drive Chip: L298N. Operating Voltage(VDC): 5~35 Peak Current (A): 2 Continuous Current (A): 0-36mA No. of Channels: 2 Over-Current Protection (A): Yes Thermal Protection: Yes
Reference: RBD-0212
Input: 110v or 240v A/C (50/60Hz) Cell Count: 2~3s Battery Type: LiPoly Output Current: 3 x 800mA
Reference: RBD-0749
Tire with sponge liner for more strength With upgraded tire tread for greater friction New design wheel for better combination with the motor Diameter: 85 mm Width : 38 mm The material of Wheel: High-strength plastic The material of Tyre: Rubber Color: Black Tyre + Blue Rim
Reference: RBD-1775
Wago Compatible 2 Port, 3 Port, 5 Port, 221 Splicing Connector, Lever-Nut Assortment Pocket Pack for All Wire 12-24 AWG You will get the 1 pcs of the model of your choice. A- 2 Port. B- 3 Port. C- 5 Port. Please Choose Size Below
Reference: RBD-3400
Chip built-in 16bit AD converter, 16-bit data output Driver Chip: MPU6050 Operating Voltage: 3-5V DC Communication: I2C/IIC Protocol Gyro Range: ± 250, 500, 1000, 2000 °/s Accelerometer Range: ± 2 ± 4 ± 8 ± 16 g
Reference: RBD-0926
USB Driver: FT232 Manufacturer: Gravitech Operating Voltage (logic level): 5V 8 analog inputs ports: A0 ~ A7 14 Digital input / output ports: TX, RX, D2 ~ D13 1 pair of TTL level serial transceiver ports RX / TX Using Atmel Atmega328P-AU MCU There is a bootloader installed in it Standard 0.1” spacing DIP (breadboard friendly). Manual reset switch. Please...
This Bluetooth module has the original CSR Chip
