مخطط الأطراف
مخطط أطراف وحدة Bluetooth التسلسلية HC-05 / HC-06 (ZS-040)
الأطراف
- EN / KEY (hold high at power-up — or hold the button — to enter AT command mode at 38400 baud)
- VCC (3.6–6V typical — check your specific board)
- GND
- TXD (module → MCU RX, 3.3V logic)
- RXD (MCU TX → module — module RX is 3.3V, use a divider/level shifter from a 5V MCU)
- STATE (goes high once paired/connected, on most boards)
المواصفات
| Bluetooth | v2.0 + EDR, Classic SPP (no BLE) |
|---|---|
| الدور | HC-05 master/slave; HC-06 slave only |
| التردد | 2.4 GHz |
| المدى | ≈ 10 m (Class 2) |
| Supply (breakout) | 3.6–6 V (onboard 3.3 V regulator) |
| المستوى المنطقي | 3.3 V (RXD needs a divider from 5 V) |
| Default baud rate | 9600 (HC-05 AT mode: 38400) |
| Default PIN | 1234 |
| الواجهة | UART |
الملاحظات
- The LED tells the mode: fast blink = waiting to pair, slow double-blink = connected, 2 s blink = AT mode.
- The HC-06 is the slave-only sibling on the same carrier: same pins, but no STATE/EN function on most boards and AT commands without line endings.
