DFPLayer Mini
3. Serial Communication Protocol
Serial port as a common communication in the industrial control field, we conducted an industrial level of
optimization, adding frame checksum, retransmission, error handling, and other measures to significantly
strengthen the stability and reliability of communication, and can expansion more powerful RS485 for
networking functions on this basis, serial communication baud rate can set as your own, the default baud
rate is 9600
3.1. Serial Communication Format
Support for asynchronous serial communication mode via PC serial sending commands
Communication Standard:9600 bps
Data bits :1
Checkout :none
Flow Control :none
Format
：
$S VER Len CMD Feedback para1 para2 checksum $O
$S Start byte 0x7E
Each command feedback begin with $ , that is
0x7E
VER Version Version Information
Len the number of bytes after “Len”
Checksums are not counted
CMD Commands
Indicate the specific opera
pause, etc.
Feedback Command feedback
If need for feedback, 1: feedback, 0: no
feedback
para1 Parameter 1 Query high data byte
para2 Parameter 2 Query low data byte
checksum Checksum
Accumulation and verification [not include
start bit $]
$O End bit End bit 0xEF
For example, if we specify play NORFLASH, you need to send: 7E FF 06 09 00 00 04 FF DD EF
Data length is 6, which are 6 bytes [FF 06 09 00 00 04]. Not counting the start, end, and verification.
3.2 .Serial Communication Commands
1).Directly send commands, no parameters returned
CMD Function Description Parameters(16 bit)
0x01 Next
0x02 Previous
0x03 Specify tracking(NUM) 0-2999
0x04 Increase volume
0x05 Decrease volume
0x06 Specify volume 0-30
0x07 Specify EQ(0/1/2/3/4/5) Normal/Pop/Rock/Jazz/Classic/Base
0x08 Specify playback mode (0/1/2/3)
Repeat/folder repeat/single repeat/ random
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