FSC-DB225 User Guide

[Version: 1.0] [中文版]

This guide will introduce how to use the FSC-DB225 and provide more information about this development board.

Overview

FSC-DB225 is a Feasycom rapid evaluation board designed for use with specific supported Feasycom Bluetooth modules that comply with Bluetooth 5.2 (backward compatible with 2.1 and 3.0) and support simultaneous audio streaming and data transmission over Classic SPP and LE GATT.

It integrates a variety of functions, including a Type-C interface (supporting UART/USB/power supply), audio input and output, a microphone, function buttons, a reset button, 2.54mm pin headers, and LED status indicators.

It is compatible with Feasycom’s Serial Assistant and AT commands for function testing, enabling developers to familiarize themselves with Feasycom’s products more quickly, accelerate development, and improve efficiency.

FSC-DB225 with FSC-BT1114QI module - Front

FSC-DB225 with FSC-BT1114QI module - Back

Scope of Application

Applies to :

  • FSC-BT1114QI

    …

and other Feasycom Bluetooth audio modules for application development

Functional Components

DB225_GN

No.

Components

Description

1

Type-C

Power/Communicate with/Charge the battery via the module.

2

Line_out

Standard 3.5mm headphone output, capable of driving 16/32-ohm speakers, with a maximum of 60mW.

3

Line_in

Standard 3.5mm Audio interface.

4

MIC_L/MIC_R

HFP (used for incoming and outgoing calls, defaulting to the L channel) and applications requiring a microphone.

5

Line in/MIC Switching

Audio Input and Microphone Input Selection.

6

VOL -

Short press to decrease volume.

7

VOL +

Short press to increase volume.

8

Play/Pause Button

Music Play/Pause Button.

9

Expansion Pin

PIN1 - PIN8 Expansion Pins.

10

ON/OFF

Long press to power on/off.
For music playback: short press to pause/play.
For incoming calls: short press to answer, then short press again to hang up.

11

Module Status LED

LED1: Green Light.
LED2: Blue Light.

12

Reset

Short press to reset the module.

13

SMA or IPEX External Antenna Expansion

Switch to the external antenna.

14

TRBI1200

The interface of the TRBI200 programmer, empty by default.

15

UART Expansion

Serial Port Expansion Pins.

16

Debug and Download

Expansion pins for reset, download, debug，etc.

17

3V3

3V3

18

GND

GND

19

USB Communication LED

Indicator lights for USB1-4 port working status.

20

VBUS

When the module inputs audio signals via USB, jumper connection is required.

21

3V3 power supply

3.3V power supply short - circuit enablement.

22

I2S Test Point

Reserved I2S test points for external communication testing.

23

NFC

NFC coil soldering pads (NFC functionality is available in some modules).

24

NFC and SPK Switching

NFC and SPK jumper selection.

What You Need

Required Hardware

  • 1 x FSC-DB225-BT1114QI

  • 1 x FSC-DB215-BT631D or other BIS sink device

  • 2 x USB-to-Type-C male-to-male data cable

  • 1 x PC（Windows / Mac）

  • 1 x mobile phone or music player

  • 1 x 3.5mm TRS male-to-male auxiliary cable (Optional)

  • 1 x bluetooth speaker or wired audio input bluetooth headset (Optional)

Software and Setup

  • Serial Driver： CP210x_Universal Driver 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 use either of the following power supply methods：

  • Type-C power supply (default)

  • 3V3 / GND pin power supply

Note：Do not connect the above power supply modes simultaneously, as this may damage the development board and/or the power supply.

Hardware Access Note

  • Before power-on, confirm that the development board is intact and that no components are loose or stuck together.

  • Connect the development board to the PC using a USB-to-Type-C cable.

  • After power-on, the LEDs on the development board flash, indicating that the module is operational and ready for debugging.

Quick Start

Hardware Access and Start

Connect the development board (FSC-DB225-BT1114QI) to your PC with a USB-to-Type-C cable via the Type-C port (component USB1). Set the power switch (component ON/OFF) to the shorted position, when LED1 blinks slowly, the module has started up correctly.

image-20250506193714570

Serial Port Recognition

The device supports plug-and-play (no additional component control required). The PC will recognize the USB serial device and generate a virtual COMx port.

image-20250513150050921

AT - Serial Communication Test

Command

AT\r\n

Response

\r\nOK\r\n

Description

Tests UART communication between the host and the module, when power is on or the baud rate is changed.

Example:

Send:     << \r\nAT\r\n
Response: >> \r\nOK\r\n

DB225

Application Examples

LE Audio BIS（Broadcast Isochronous Stream）Application

Application Diagram

db225

Application Demo

  1. FSC-DB225-BT1114QI：Connect via a Type-C cable to a PC. Upon successful connection, the PC will automatically recognize the serial port device and generate a virtual COMx.

  2. FSC-DB225-BT1114QI：Set the Profile of the Bluetooth module (FSC-BT1114QI) and enable BIS Gateway. The specific AT command operations and responses are as follows:

    Send:     >> AT+PROFILE=131412
Response: << OK
Response: << +GATTSTAT=1
Response: << +A2DPSTAT=1
Response: << +AVRCPSTAT=1
Response: << +HFPSTAT=1
Response: << +BISSTAT=1
Response: << +VER=FSC-BT1114QI,V2.0.0,20260114
Response: << +DEVSTAT=7
Response: << +AUDROUTE=1
Response: << +BISSTAT=5
Response: << +BISSR=48000

  3. FSC-DB225-BT1114QI：The development board supports configuration into three audio input modes (USB, lineIn, and I2S) via AT commands. Here we demonstrate the Linein audio input mode, the AT command configuration operations as follows:

    Send:     >> AT+AUXCFG=1    //Enable LineIn audio input mode
Response: << OK

  4. FSC-DB215-BT631D ：Connect via a Type-C cable to a PC. Upon successful connection, the PC will automatically recognize the serial port device and generate a virtual COMx. Connect the LineOut component on the development board to an external audio device (such as wired headphones or speakers) using an AUX cable at the same time.

  5. FSC-DB215-BT631D：Set the Profile of the corresponding Bluetooth module FSC-BT1114QI and enable BIS Headset. The AT command operations and responses are as follows:

    Send:     >> AT+PROFILE=16384            //Enable BIS Headset Profile
Response: << OK
Response: << +BISSTAT=1
Response: << +DEVSTAT=0
Response: << +PWRSTAT=1
Response: << +VER=BT631D,V3.0.9,20250306
Response: << +PROFILE=16384
Response: << +DEVSTAT=1
Response: << +DEVSTAT=3

  6. FSC-DB215-BT631D：Establish BIS audio connection with the specified BIS Gateway device. The AT command operations and responses are as follows:

    Send:     >> AT+SCAN=4        //Scan for nearby BIS/CIS device broadcast source
Response: << +DEVSTAT=67
Response: << OK 
Response: << +SCAN=0,-39,5,DE0D3000187D,FSC-BT1114QI-185D,885
...
...
Response: << +SCAN=E            //Scan Completed
Response: << +DEVSTAT=3

    Send:     >> AT+BISCONN=FSC-BT1114QI-185D     //Initiate LE audio BIS connection with specified device by BIS Gateway name.
Response: << +BISSTAT=2                 //Establishing BIS connection
Response: << OK
Response: << +DEVSTAT=65
Response: << +BISSTAT=5                //Established BIS connection and receiving BIS data

  7. FSC-DB225-BT1114QI：Connect the LineIn port to a computer or other audio device, and then play the audio.

  8. FSC-DB215-BT631D：Receive the BIS broadcast audio stream from the DB225 side (BIS Gateway), and simultaneously output the audio stream to the external audio device through the development board’s LineOut component—meaning the external audio device can synchronously play the audio stream from the mobile phone side.

  9. Expand more devices to receive BIS broadcast audio：The current development board supports an unlimited number of BIS broadcast audio receiving devices (BIS headsets). Simply repeat Steps 4, 5, and 6 for configuration.

Contact Information

Shenzhen Feasycom Co.,Ltd.

Address : Rm 508, Building, Fenghuang Zhigu, NO.50, Tiezai Road, Xixiang, Baoan Dist, Shenzhen, 518100, China.

Telephone : 86-755-23062695

Support : support@feasycom.com

Sales Service : sales@feasycom.com

Home Page : www.feasycom.com

Support Forum : forum.feasycom.com

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