
Bluetooth 2.0 module with dual-board design for electrostatic protection, two DC power inputs, built-in antenna, DIP switch for settings, and LED status indicators.

GND
3.5-8V DC (When there is VCC input, 3V3 port can be used as 3.3V power output)
Empty Pin
UART Input(TTL Level), connect to MCU TXD
UART Output(TTL Level), connect to MCU RXD
DC3.3V (When there is 3.3V input, the VCC port cannot be connected to power source)
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| GND | Official table 2 row 1 | ground | GND | |
| VCC | Official table 2 row 2 | power | 3.5-8V DC (When there is VCC input, 3V3 port can be used as 3.3V power output) | |
| NC | Official table 2 row 3 | pin | Empty Pin | |
| RXD | Official table 2 row 4 | uart | UART Input(TTL Level), connect to MCU TXD | |
| TXD | Official table 2 row 5 | uart | UART Output(TTL Level), connect to MCU RXD | |
| 3V3 | Official table 2 row 6 | power | DC3.3V (When there is 3.3V input, the VCC port cannot be connected to power source) |
UART · SPI · 3.3 V · 5 V · Breakout
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