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TSquareY1
HC-05 Bluetooth
★★★★★
0.0/5 (0 reviews)₹189
₹260
27% off
The HC-05 Bluetooth Module is a professional-grade wireless serial bridge that can operate in both Master and Slave modes. It is a mechanical necessity for autonomous robot swarms, wireless game controllers, and complex data mesh networks, as it allows two microcontrollers to "talk" to each other without a smartphone middleman. Built on the Bluetooth 2.0+EDR standard, it provides a transparent serial pipe that is easy to integrate into any UART-compatible system.
✓ In Stock (50 available)
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▪Bi-Directional Master/Slave Logic: The HC-05 is a mechanical necessity because it can initiate connections (Master mode), allowing one Arduino to actively search for and "pair" with another, which is impossible with the HC-06.
▪Full AT Command Control: Features a dedicated "EN" (Enable) or "Key" pin to enter a deep configuration mode. This is a mechanical necessity for changing the module's role, baud rate, and security PIN via serial commands.
▪Transparent Data Transmission: Once a link is established, the module acts as a wireless serial cable, a mechanical necessity for replacing complex wiring in telemetry systems and remote diagnostics.
▪Robust Frequency Hopping (FHSS): Uses advanced hopping logic to avoid interference from other 2.4GHz devices, ensuring a stable and jitter-free connection for real-time RC vehicle control.
▪Status Indication Logic: Includes an onboard LED that changes flash patterns based on state (searching, pairing, or connected), making it a "drop-in" utility for student labs and rapid debugging.
Protocol
Bluetooth V2.0 + EDR (Enhanced Data Rate)
Role
Master or Slave (Software selectable via AT commands).
Operating Voltage
3.6V to 6V DC (Onboard 3.3V regulator).
Logic Level
3.3V UART (5V tolerant VCC, but RX requires level shifting).
Default Settings
Baud rate 9600, PIN 1234, Mode Slave.
Sensitivity
-80dBm; Adjustable transmit power up to +4dBm.
Pairing
Supports auto-connect to the last device on power-up.
