Applicable models
LBE-LEI-M-00, LBE-LES-M-00, LBE-LES-M-01, LBE-LEC-M-00, LBE-LEE-M-00
LBE-KEI-M-00, LBE-KES-M-00, LBE-KES-M-01, LBE-KEC-M-00, LBE-KEE-M-00

System Introduction

System Definition

Stop Playing

Play folder 0 to stop the current playback.

Number of folders

The system supports a maximum of 256 folders [0255].

Folder Definition

• Folder 0 is a system reserved folder and a silent folder; When the user needs to mute or interrupt the current playback, simply switch to folder 0.
• Folder 0 is hidden by default and cannot be edited.
• The folders numbered 1-255 are user folders, and audio files can be freely imported.
• There is no limit to the number of songs imported into a single folder, as long as the capacity allows.
• The playback system can only specify folders and cannot specify which file to play; If you need to specify a file, this folder only needs to hold one audio file.
• When the playback system specifies to play a folder, the system will determine the playback strategy based on the "playback mode" and "selection mode": loop or single, order or random, as detailed in the next section "Mode Definition".

Support file formats

The audio file format supports. mp3 and. wav.

Support interfaces

At present, the player supports four control interfaces:

Pattern definition

Volume mode

PlaybackState

Voice playback mode Playback Mode

Select Mode

Allow ignoring playback command IgnorePlayCMD

Ethernet

Protocol: LD-NET2

Protocol Description

• Based on TCP/IP; Please maintain a minimum interval of 50 ms between TCP disconnection and connection: TCP disconnection → delay of 50 ms → TCP connection. The
• protocol consists of 7 bytes: head function param1 param2 param3 xor tail. Function code parameter 1 parameter 2 parameter 3 xor checksum.
• Head code: 0x01
• Tail code: 0x02
• xor checksum: XOR obtained from the first 5 bytes.
  xor = header ^ function ^ param1 ^ param2 ^ param3
• Instruction interval: Please keep the interval between each instruction sent at least 200 ms. Please refer to the "LD-SP2" chapter for the composition and analysis of protocol instructions

.

Protocol: Modbus TCP

Protocol Description

• Support Instructions:
• Read and Hold Register (0x03)
• Write a single hold register (0x06)
• Write multiple hold registers (0x10)
• Instruction interval: 200 ms or more.

Related registers

Protocol Instruction

Write Single Register Instruction

Send Format:

• Transaction identifier: Message number, usually self increasing.
• Protocol identifier: default 0x0000.
• Length: Subsequent byte length, fixed 0x06 for writing to a single register.
• Unit identifier: default 0x01.
• Function code: 0x06.

Reply format:Consistent with sending.

Example 1:Play folder 1 (write 0x03 as 1)
Controller → Player (HEX):00 01 00 00 00 06 01 06 00 03 00 01
Player → Controller (HEX):00 01 00 00 00 06 01 06 00 03 00 01

Example 2:Stop playing (write 0x03 as 0)
Controller → Player (HEX):00 02 00 00 00 06 01 06 00 03 00 00
Player → Controller (HEX):00 02 00 00 00 06 01 06 00 03 00 00

Example 3:Set volume to 100% (write 0x04 as 100=0x64)
Controller → Player (HEX):00 03 00 00 00 06 01 06 00 04 00 64
Player → Controller (HEX):00 03 00 00 00 06 01 06 00 04 00 64

Read register instruction

Send format:

Reply format:

Example:Read playback status (read 0x08)
Controller → Player (HEX):00 04 00 00 00 06 01 03 00 08 00 01
Player → Controller (HEX):00 04 00 00 00 05 01 03 02 00 02
→ Current playback status is 2 (playing).

Protocol: HTTP-GET

Protocol Description

• Based on HTTP, the player has built-in HTTP services.
• Instruction interval: 500 ms or more.

Protocol Instruction

Play Instruction

URL:
http://{IP}:{port}/control/play?id={dir}
http://{IP}:{port}/control/play?id={dir}&volume={vol}

Parameters:

Reply:
{"Code":0,"Msg":"ok"}

Example 1:Play folder 1 at 100% volume (default IP/port)
Controller → Player:http://192.168.168.254:7890/control/play?id=1&volume=100
Player → Controller:{"Code":0,"Msg":"ok"}

Example 2:Stop playing (id=0)
http://192.168.168.254:7890/control/play?id=0&volume=100
Reply as above.

Example 3:Play folder 2 (without volume)
http://192.168.168.254:7890/control/play?id=2
Reply as above.

Set Volume

URL:
http://{IP}:{port}/control/set?volume={value}

Example:Set to 90%
http://192.168.168.254:7890/control/set?volume=90
Reply:{"Code":0,"Msg":"ok"}

Set playback mode

URL:
http://{IP}:{port}/control/set?loopmode={value}
value: 0=loop, 1=single

Example:Set as loop
http://192.168.168.254:7890/control/set?loopmode=0

Set selected mode

URL:
http://{IP}:{port}/control/set?selectmode={value}
value: 0=order, 1=random

Example:Set as order
http://192.168.168.254:7890/control/set?selectmode=0

Set to allow ignoring playback instructions

URL:
http://{IP}:{port}/control/set?ignorecmd={value}
value: 0=not allowed, 1=allowed

Example:Allow to ignore
http://192.168.168.254:7890/control/set?ignorecmd=1

Query player status

URL:
http://{IP}:{port}/control/get

Reply example:
{"Volume":100,"SelectMode":0,"LoopMode":0,"IsIgnorePlayCmd":1,"State":2,"GroupId":2,"FileIndex":0,"Code":0}

Field description:

serial port

Protocol: LD-SP2

Protocol Description

• Frame format: 7 Byte head function param1 param2 param3 xor tail function code parameter 1 parameter 2 parameter 3 xor verification tail code
• Headcode: 0x01
• Tail code: 0x02
• XOR verification: XOR of the first 5 bytes
• Instruction interval: above 200ms.

Protocol Instructions

Play command

Request:
01 51 dir 00 volume xor 02
Reply:
01 52 dir 00 volume xor 02

Example:Play folder 2 at 96% volume
Controller → Player (HEX):01 51 02 00 60 32 02
Player → Controller (HEX):01 52 02 00 60 31 02

Set volume command

Request:
01 41 00 00 volume xor 02
Reply:
01 42 00 00 volume xor 02

Example 1:Set to 100
01 41 00 00 64 24 02
Reply:01 42 00 00 64 27 02

Example 2:Set to 28
01 41 00 00 1C 5C 02
Reply:01 42 00 00 1C 5F 02

Set playback mode instruction

Request:
01 43 00 00 playback_mode xor 02
Reply:
01 44 00 00 playback_mode xor 02

Example:Set to loop
01 43 00 00 00 42 02
Reply:01 44 00 00 00 45 02

Set selected mode command

Request:
01 45 00 00 select_mode xor 02
Reply:
01 46 00 00 select_mode xor 02

Example:Set as random
01 45 00 00 01 45 02
Reply:01 46 00 00 01 46 02

Set to ignore playback commands

Request:
01 47 00 00 ignore_play_cmd xor 02
Reply:
01 48 00 00 ignore_play_cmd xor 02

Example:Enable ignore
01 47 00 00 01 47 02
Reply:01 48 00 00 01 48 02

Query Status Instruction 1

Request:
01 53 00 00 00 52 02
Reply:
01 54 00 playback_state volume xor 02

Example:
Controller → Player:01 53 00 00 00 52 02
Player → Controller:01 54 00 02 5A 37 02
→ Status: Playing; Volume: 90

Query Status Instruction 2

Request:
01 55 00 00 00 54 02
Reply:
01 56 playback_mode select_mode ignore_play_cmd xor 02

Example:
Controller → Player:01 55 00 00 00 54 02
Player → Controller:01 56 00 01 01 57 02
→ Play mode: Loop; Selection mode: Random; Ignore the same instruction: Yes

Query Status Instruction 3

Request:
01 57 00 00 00 56 02
Reply:
01 58 dir 00 00 xor 02

Example:
Controller → Player:01 57 00 00 00 56 02
Player → Controller:01 58 02 00 00 5B 02
→ Current playback folder: 2

Protocol: Modbus RTU

(Omitted, completely consistent with the Modbus TCP register definition, only the link layer is changed to RTU, as shown in the original text for an example)

CAN

Protocol: LD-CAN1

• Frame format: 8 Byte header function param1 param2 param3 param4 xor tail, function code parameter 1 parameter 2 parameter 3 parameter 4 xor tail
• Headcode: 0x01; Tail code: 0x02; XOR: XOR for the first 6 bytes.
• The frame ID can be modified by the upper computer. The default request from the factory is 0x200, and the reply is 0x201.
• Instruction interval: 100 ms or more.

(The format of each instruction frame is exactly the same as the instruction parameters corresponding to LD-SP2, with only the addition of param4 placeholder, as shown in the original example)

Protocol: LD-CAN2

• Frame format: 8 bytes, no tail code, no xor, header code 0x01, and the rest reserved 0x00.
• Frame ID default: Request 0x200, reply 0x201.
• Instruction interval: 100 ms or more.

(All instructions are the same as LD-CAN1, except for xor and tail code, see example in the original text)

IO input

LD-INPUT1

• Trigger condition: Maintain the corresponding input port trigger state.
• Input type: NPN/PNP can be wired for selection.
• The 8-bit input port status determines the folder number (binary weighted, supports 0-255, 0 is stopped).
• The example table and calculation process can be found in the original text.

LD-INPUT4

• Trigger condition: At least 100 ms pulse signal.
• The rest of the rules are the same as LD-INPUT1, except that the triggering method is changed to pulse.
• Example table and calculation process can be found in the original text.