MP3 Serial Port module interfacing

i had MP3 Serial Port module. when the sd card enterd mp3 files are paly. but i cant controll volume, next song, etc... what are the serial command. how it do.pls help me
when i try in softwear serial code. i got below reply from module when insert and removeing SD card and pendrive
my module in below picture

5pcs-lot-mp3-serial-port-control-music-module.jpg

what are the serial command.

How should we know? Post a link to the hardware, not a picture of the hardware.

http://www.aliexpress.com/item/Voice-broadcast-music-MP3-serial-port-control-module-module-TF-card-usb-card-reader/32495423543.html?spm=2114.40010308.4.9.S5Omrk

this is the module

http://www.aliexpress.com/item/Voice-broadcast-music-MP3-serial-port-control-module-module-TF-card-usb-card-reader/32495423543.html?spm=2114.40010308.4.9.S5Omrk

this is the link of module

Hello and welcome,

Link to documentation in chinese: http://pan.baidu.com/s/1c00Ex9Y

You can download the pdf and use google translator... Or maybe contact the vendor and ask for english documentation... :slight_smile: