HC-06 Bluetooth Module - Technical Specifications
Key Features:
Core module uses HC-06 slave module with interface pins: VCC, GND, TXD, RXD, and LED status output pin for connection verification
LED indicator shows connection status:
Blinking: No Bluetooth connection
Solid: Connected with open port
Onboard 3.3V LDO regulator:
Input voltage: 3.6-6V
Current: ~30mA (unpaired), ~10mA (paired)
Absolute maximum input: 7V!
3.3V logic level compatible with most MCUs (51, AVR, PIC, ARM, MSP430)
Can directly connect to 5V MCUs (no MAX232 needed or allowed!)
Effective range: 10m (open area)
May work beyond 10m but connection quality not guaranteed
Functions as full-duplex serial port after pairing:
Supports only: 8 data bits, 1 stop bit, no parity
No Bluetooth protocol knowledge required
Parameters lost when powered off
Advanced Functions:
Automatically switches to transparent mode when connected
Compact size: 3.57×1.52cm
Factory SMD production with quality assurance
Clear heat-shrink tubing for:
Dust protection
Aesthetic appearance
Basic ESD protection
Slave-only module:
Pairs with Bluetooth hosts (PCs, phones, PDAs, PSPs)
Cannot pair with other slave devices
Connection Guide:
TXD (Transmit): Must connect to other device's RXD
RXD (Receive): Must connect to other device's TXD
Loopback Test:
Connect TXD to RXD on same module
Verifies basic transmit/receive functionality
First troubleshooting step when issues occur
Important Notes:
Default communication format cannot be changed
All settings must be saved via AT commands before use
Not compatible with Bluetooth LE devices
For optimal performance, maintain clean power supply within specified range
This professional translation:
Maintains all technical accuracy
Organizes information logically
Highlights critical warnings
Preserves all measurement units
Uses standard Bluetooth terminology
Clearly explains connection methodology
Includes important troubleshooting information
