Hardware Design

[中文版]

Module Pin Diagram

Pin Description

Pin	Pin Name	Type	Pin Descriptions
1	UART_TX	O	Serial Transmitter Data
2	UART_RX	I	Serial Receiver Data
3	UART_CTS	I/O	UART Clear to Send(no connection request)
4	UART_RTS	I/O	UART Request to Send(no connection request)
9	Disc/USB_DM/PIO0	I/O	Disconnect the connecting pin
11	RESET	I	Active-low reset input
12	VDD	Power	Power supply voltage 3.3V, LDO power supply preferred
13	GND	GND	GND
15	ICE	I/O	Writing firmware pin
32	LED	O	Bluetooth not connected to output square wave, Bluetooth connected to output high level
33	STATUS	O	Connection state, output. H=Connected , L=No connection
34	Tran/USB_DP/PIO1	O	UART Mode Control Pin: H = Command Mode; L = Transparent Transmission Mode
36	EXT_ANT	ANT	Changing the 0 ohm resistance near the antenna, it is possible to connect a Bluetooth antenna externally

Hardware Design Notes

• In simple test environment, the module can be used for basic testing and operation by simply connecting VDD, GND, UART_RX, and UART_TX.

• If the MCU needs to obtain the connection status of the Bluetooth module, it needs to be connected to the STATUS pin.

• After drawing the schematic diagram, please send it to Feasycom for review to avoid Bluetooth distance not achieving the best effect.