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Serial Port Controlled MP3 Voice Playback Chip Module MCU-Controlled Trigger Custom Audio 20W Power S20F

Score：

Brand：TZT

Weight：13.00~45.70g

Stock：499995

Price：$3.26~4.32

Style：

Quantity:: - +

S20F主图EN.jpg

Product characteristics

l Supply by 6-35VDC , 12V and higher is recommended

l Decode MP3 and WAV audio formats, sampling rate up to 48KHz

l Control to play by UART commands; Play, pause, select track and so on

l 20W Class D power amplifier; Can drive 4Ω/20W or 8Ω/10W speaker

l 64Mbits（8MBytes）flash memory inside

l Change voice files by USB downloading

l Relay output can control AC and DC

Pins and Interface definition

Interface Name	Description
6V-35VDC	Power supply by 6-35VDC ,12V and higher recommended
5V	5V Power output, max current 300mA
GND	Reference Ground
UART_RX	UART RXD
UART_TX	UART TXD
BUSY	Play state，output 3.0V while playing，other output 0V
Speaker+	Speaker positive output
Speaker-	Speaker negative output
NO	Relay output, NO and COM are shorted while playing
COM	Relay common output
NC	Relay output, NC and COM are open while playing

Electrical Characteristics

Parameters	Interface	Range		Unit
Power(in)	6-35VDC	6-35		V
Power(out)	5V	0-300		mA
Digital I/O	BUSY, UART_TX, UART_RX	High level	2.7-3.3	V
Digital I/O	BUSY, UART_TX, UART_RX	Low level	0-0.3	V

Product size

主图2.jpg

Change voice files

Connect CX-S20F to a computer by an USB cable, it will show a USB flash drive，copy voice files(mp3) into it

Note：Voice files must be renamed by five number such as 00001.mp3, 12345.mp3 and 65535.mp3

S20F音频下载EN.jpg 继电器说明EN.jpg

Testing steps

1、 Connect CX-S20F to a computer by an USB to TTL module(CX-340 recommended); UART_TX、UART_RX、GND；

UART_TX and UART_RX are cross connected；install a speaker.

2、 Supply CX-S20F first, 12VDC or 24VDC recommended; then connect CX-340 to PC

3、 Start the serial debugging tool APP, and finish settings, set the baud rate of the serial port to 9600; Click

buttons to test.

Note：1）It is not available that supply by USB port of computer, because it will work in download mode,

while connecting to computer by USB cable

2）Have downloaded test audio inside（00001.MP3……00009.

S20F串口通信图EN.jpg 串口调试工具EN.jpg

Protocol of UART

Settings of UART：Start：1bit；Data：8bits；Stop：1bit；Check：None；Baud Rate:9600。

1.Formate of protocol

Start	Length	Device ID	CMD	Data	Sum Check	End
0xFE	1 byte	2 bytes	1 byte	0-n byte	1 byte	0xBE

Start：1 byte，fixed FE。 Length：1 byte，the number of all bytes

Device ID：2 bytes，High byte first, low byte last. 0xFFFF is the broadcast，available to all devices. Range of device ID is 0~65534，Default device ID is 0x0001

CMD：1 byte, CMD code.

Data：0~n byte，High byte first, low byte last.

Sum Check：1 byte，the low 8 bits of all bytes sum.

End:1byte, fixed BE.

2.CMD SPEC

指令1EN.jpg