FSC-DB218 User Guide

[中文版]

This guide introduces how to use the FSC-DB218 and provides further information about this development board.

Overview

Feasycom FSC-DB218 development board integrates Type-C (including UART/USB/power supply), audio input/output, microphone, lithium battery, buttons, reset button, status indicators, and other components.

It is compatible with Feasycom serial port tool and AT commands for function testing, allowing developers to quickly familiarize themselves with Feasycom’s products, shorten the development cycle, and improve efficiency.

db218-A

FSC-DB218 - Front

Scope of Application

Applicable to :

FSC-BT1046 Bluetooth audio modules.

Functional Components

db218-bt1046-function

序号

Component

Description

1

Type-C

Powers the module.
Communicates with the module.
Charges the battery via the module.

2

USB/UART Selector

Dual-mode communication interface selector (UART/USB).
UART mode: USB power supply & UART serial communication.
USB mode: USB power supply & USB interface communication.
Note: Not all modules support USB function.

3

Power Selector

Short (Down): Module powered by Type-C.
Open (Up): Module powered by battery.
(Multifunctional)Battery charged when Type-C has input voltage and Battery Charging/Module Upgrade Pin (Component 11) is shorted.

4

ON/OFF Button

Module power control button.
Long press for 3s to power on/off (Note: Not required for all module programs).
(Multifunctional) A2DP music playback: short press to pause/play.
(Multifunctional) HFP incoming call: short press to answer, short press again to hang up.

5

V+ Button

Volume up: short press to increase volume.
(Multifunctional) Long press to switch to next track during A2DP music playback.

6

V- Button

Volume down: short press to decrease volume.
(Multifunctional) Long press to switch to previous track during A2DP audio playback.

7

Reset Button

Module reset button: short press to reset the module.

8

MIC

Microphone audio input.
Used for incoming/outgoing calls during HFP protocol communication (L channel by default).

9

Line IN

Analog audio input, standard 3.5mm audio interface.

10

Headphone

Analog audio output (SPK out).
Standard 3.5mm headphone output.
Can drive 16/32 ohm speakers with a maximum output of 60mW.

11

VBUS

Battery charging/module upgrade.
Charges the battery when shorted.
Used for module upgrade/fixed frequency (shorted by default).

12

Battery

Lithium battery interface.
3.7V~4.2V: Do not exceed this voltage range, otherwise the module may be damaged.

13

TRBI200

TRBI200 programmer interface (empty by default).

14

Module Area

Example : FSC-BT1046 Bluetooth audio module.

15

Antenna

On-board external antenna for the module.

16

LED

LED0 fast flashing: pairing mode.
LED0 solid on: connected.
LED1 solid on: SPP/BLE connection successful.
(Supported by general programs)

What You Need

Take FSC-DB218 with FSC-BT1046 an example:

Required Hardware

  • 1 x FSC-DB218-BT1046 : FSC-DB218 development board with Feasycom FSC-BT1046 (optional) Bluetooth audio module integrated.

  • 1 x USB to Type-C data cable

  • 1 x PC（Windows / Mac）

  • 1 x Phone or music player

  • 1 x 3.5mm AUX Male-to-Male audio cable (optional)

  • 1 x Bluetooth speaker or wired audio input Bluetooth speaker (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 App ：Feasycom APP & SDK resource supporting Android and iOS, which enables functions such as Bluetooth BLE & SPP data communication debugging, Feasycom module firmware version reading, OTA upgrade, OTA command, parameter configuration, etc.

  • Communication Interface : UART

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

Hardware Access

Power-on Options

  • Type-C 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.

  • Development board connects to a PC via a USB to Type-C cable.

  • Select the communication mode using the USB/UART Communication Selector (Component 2): Choose UART mode for USB power supply & UART serial communication, or USB mode for USB power supply & USB port communication.

  • Set the Power Selection Switch (Component 3) to the down position to switch to USB power supply mode.

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

Get Start

Power Supply Connection

Connect the Type-C port (Component 1) of the FSC-DB218-BT1046 development board to the PC via a USB to Type-C cable.

Set the USB/UART Communication Selector (Component 2) to UART mode and the Power Selection Switch (Component 3) to the down position for USB power supply. The LED will light up and flash slowly, indicating the FSC-BT1046 Bluetooth module has started successfully.

db218-bt1046

Serial Port Recognition

The PC will automatically recognize the serial port and create a virtual COM port.

db215-cp210x-comx

AT - Uart Communication Test

Run the Feasycom Serial Port Tool on the PC, set the correct COM and Baud, and check the New Line.

Send the serial communication test command AT. If it responds with OK, it indicates that the serial communication test is successful. Example:

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

db218-bt1046-at

Application Examples

Take FSC-DB218 with FSC-BT1046 an example:

Bluetooth Audio Source Mode

Note: FSC-BT1046 only supports Bluetooth audio source application.

db218-audiotx

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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