Hardware Design
Module Pin Diagram
Pin Description
Pin |
Pin Name |
Type |
Pin Descriptions |
|---|---|---|---|
1 |
UART_TX |
O |
UART transmit pin |
2 |
UART_RX |
I |
UART receive pin |
5 |
MODE |
I |
Low level for transparent transmission mode, high level for command mode |
6 |
RESET |
I |
Low level for reset |
7 |
VDD |
Power |
3.3V power supply; LDO power supply is recommended |
8 |
GND |
GND |
GND |
15 |
DISCONNECT |
I/O |
High level to disconnect (Bluetooth must be connected first) |
17 |
LED |
O |
Outputs square wave when Bluetooth is disconnected; outputs high level when Bluetooth is connected |
18 |
STATUS |
O |
Outputs low level when Bluetooth is disconnected; outputs high level when Bluetooth is connected |
20 |
EXT_ANT |
ANT |
An external Bluetooth antenna can be connected by changing the 0-ohm resistor near the antenna |
Hardware Design Note
The module can be used by connecting only the VDD, GND, STATUS, UART_RX, and UART_TX pins.
If the MCU needs to obtain the connection status of the Bluetooth module, the STATUS pin (Pin 18) must be connected.
If the user wants to check the working status of Bluetooth, an LED light can be connected to the LED pin (Pin 17).
After completing the schematic diagram, please send it to Feasycom for review to ensure the Bluetooth range reaches the optimal performance.