Function Description

[中文版]

1. Default Configuration

Generic Dual-Mode Data Transmission Application Firmware default configuration, using FSC-BT836B as an example：

Name	FSC-BT836B
LE-Name	FSC-BT836B-LE
Pin Code	0000
Secure Simple Pairing Mode	On
UART Baudrate	115200/8/N/1

2. GPIO Indicators

Module Operation Status

Pin	Status	Description
Pin 32	1Hz square wave	Bluetooth Disconnected
Pin 32	High level	Bluetooth Connected

BT Connection Status

Pin	Status	Description
Pin 33	Low Level	Bluetooth Disconnected
Pin 33	High Level	Bluetooth Connected

Data Transmission Mode

Pin	Status	Description
Pin 24	Low Level	Throughput Mode
Pin 24	High Level	Command Mode

3. Operation Modes

Throughput Mode

• Bluetooth Not Connected: Data received via UART is parsed as AT commands.

• Bluetooth Connected: All data received via UART is sent as-is to the remote Bluetooth device.

Command Mode

• Bluetooth Not Connected: Data received via UART is parsed as AT commands.

• Bluetooth Connected: Data received via UART is still parsed as AT commands. Data must be sent to the remote device using AT commands, e.g., AT+SPPSEND.

4. GATT Service

Type	UUID	Operation	Description
Service	0xFFF0		Throughput transmission service
Write	0xFFF2	Write, Write Without Response	APP to Module
Notify	0xFFF1	Notify	Module to APP