Hardware Design

[中文版]

Module Pin Diagram

Pin Description

Pin	Pin Name	Type	Pin Descriptions
31	UART_TX	O	UART data pin
32	UART_RX	I	UART data pin
23	RESET	I	Active-low reset
19	VDD	Power	3.3V power supply. LDO (Low Dropout Regulator) power supply is recommended
20	GND	GND	GND
28	SWCLK	I/O	Programming pin
29	SWDIO	I/O	Programming pin
8	SLP_IND	O	After Bluetooth connection, the module pulls low to notify the customer’s MCU to exit sleep mode, and outputs serial data with a 10ms delay. After Bluetooth disconnection, the module pulls high to notify the customer’s MCU to enter sleep mode.
7	WAKE_UP	I	When the MCU pulls high, the module enters sleep mode. when the MCU pulls low, the module exits sleep mode
21	LED	O	Outputs a square wave when Bluetooth is disconnected. outputs high level when Bluetooth is connected
22	STATUS	O	Low level : Bluetooth is disconnected. High level : Bluetooth is connected.

Hardware Design Note

• The module can be used by simply connecting VDD/GND/STATUS/UART_RX/UART_TX.

• If the MCU needs to obtain the connection status of the Bluetooth module, the STATUS pin (Pin 22) must be connected.

• If the user needs to check the working status of the module, the LED pin (Pin 21) must be connected.

• If low-power consumption is required, connect Pin 8 (SLP_IND) and Pin 7 (WAKE_UP); leave these pins floating if low-power consumption is not needed.

• After completing the schematic diagram, please send it to Feasycom for review to ensure the Bluetooth communication distance reaches the optimal performance.