FSC-DB105 User Guide

[中文版]

This guide introduces how to use the FSC-DB105 and provides further information about this development board.

Overview

FSC-DB105 is a rapid evaluation board specifically designed for Feasycom’s Bluetooth Dual-Mode (BLE & SPP) + Wi-Fi SOC module data transmission applications. With this evaluation board, customers can easily and efficiently run tests for their projects. Coupled with the user guide, customers can test all functionalities built into the default firmware using AT commands.

DB105-BW236

FSC-DB105 with FSC-BW236 module

Scope of Application

Applies to:

  • FSC-BW236

  • FSC-BW246

  • FSC-BW256B

and other Feasycom Bluetooth + Wi-Fi SOC Modules for application development.

Functional Components

DB105-BW236

Description by labeled number

No.

Component

Description

1

USB To UART

USB to UART (Micro-B USB): USB power supply interface, data communication interface. Used to send AT commands and exchange data with the module.

2

USB Debug

USB to UART (Micro-B USB): Debug log data output interface.

3

Battery

Battery power interface (optional, disconnected by default).

4

POWER LED

Steadily on (red) after power-up, indicates normal power supply.

5

Module SMD Area

Sample image shows a soldered Feasycom FSC-BW236 module.

6

WiFi LED
BT LED

WiFi LED: Wi-Fi status indicator, steadily on when connected to router, off when disconnected.
BT LED: Bluetooth status indicator, steadily on when connected, off when disconnected.

7

BT-Pin

Module pin extension header interface, numbers correspond to module pin numbers.

8

RESET Control Button
UART Debug Control Button

1. Firmware Download Mode Control: Press and hold the UART Debug button, then press and release the RESET button once, finally release the UART Debug button to enter firmware download mode.
2. Module Reset Control (RESET): Press RESET alone to reset the module.

9

Test LED

Test LED light, lights up when LED switch receives a high level.

10

External Antenna IPEX

(Reserved) π-shaped circuit and IPEX area for external antenna.

What You Need

Required Hardware

  • 1 x FSC-DB105-BW236 Development KIT: FSC-DB105 board pre-integrated with a Feasycom FSC-BW236 (optional)

  • 1 x USB to Micro-B Cable

  • 1 x PC (Windows / Mac)

  • 1 x Mobile Phone (Android / iOS)

Software and Setup

  • Serial Driver: CP210x_Universal_Driver.zip for Windows PC, generally plug-and-play, install this driver if the PC fails to recognize the device in specific environments.

  • Feasycom Serial Port Tool : A serial communication analysis tool based on Windows PC.

  • FeasyBlue ：Feasycom APP & SDK resource supporting Android and iOS platforms, which enables functions such as Bluetooth BLE & SPP data communication debugging, Feasycom module firmware version reading, firmware OTA upgrade，parameter configuration, etc.

  • Communication Interface: UART

  • Serial Configuration: 115200/8/N/1 (Feasycom general firmware default)

Hardware Access

Power-on Options

The development board can be powered by any one of the following methods:

  • Micro-B USB power supply (default)

  • 3V3 / GND pin power supply

Note: The above power supply modes must not be connected simultaneously, as this may damage the development board and/or the power source.

Hardware Access Note

  • Before powering on, ensure the development board is intact and all components are secure without looseness or shorts.

  • Connect the development board to the PC using the USB to Micro-B cable.

  • After powering on, the LED lights up steadily, indicating the board is powered normally and ready for debugging.

Quick Start

Hardware Access and Start

Connect the FSC-DB105-BW236 development board’s USB To UART port (Component 1) to the PC using the USB to Micro-B cable. The indicator LED lights up steadily, indicating the FSC-BW236 module has started successfully. See sample image below:

DB105-BW236

Serial Port Recognition

After successful hardware connection and startup of the FSC-DB105-BW236, it is plug-and-play. The PC will recognize the USB serial device and create a virtual COMx port. Example below:

DB105-BW236

AT - Serial Communication Test

Open Feasycom Serial Port Tool on the PC. Automatically obtain or manually select the corresponding COMx port, set the matching baud rate (e.g., 115200), check the Send New Line option, and send the serial communication test command AT. If the response is OK, the serial communication test is successful. Command format and example are shown in the image below:

Command

AT\r\n

Response

\r\nOK\r\n

Description

Test the UART communication between HOST and Module after power on, baudrate changed, etc.

Example:

send:     >>AT\r\n               
response: <<\r\nOK\r\n   //Successfully connected.

DB105-BW236

Application Examples

Bluetooth Application Example

  • FSC-BW236 only supports BLE and does not support SPP.

  • FSC-BW246 and FSC-BW256B can support BLE and SPP.

Application Diagram

The application block diagram below is also suitable for Bluetooth BLE and SPP data transmission debugging with FeasyBlue:

DB105-BW236

Wi-Fi Application Example

Application Diagram : STA+AP

DB105-BW236

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