Modbus RTU MP3 Sound Module Audio Player Serial MP3 Player Soundboard with 15W Cl D Amplifier Voice Module for Announciator

Features1. Supports Modbus RTU, UART and 7 key three control modes.2. Adopts RS485 Modbus RTU communication protocol.3. Built-in 8MB f memory on the board.4. Equipped with a micro SD slot, and supports max. 32GB micro SD card.5. Update audio files on computer via USB connection.-It works as a USB f drive on computer. No need any program.6. Equipped with a cla D 15 watts amplifier that can drive a max. 15 watts speaker (4-8 s) directly.7. Equipmmed with a 3.5mm audio for output to an external amplifier.8. Adjustable sound volume through the potentiometer.9. When a sound is playing, there is a load output simultaneously, which can directly drive a warning light.10. Wide range for power input (9-24V DC).11. size: 52*49mm

Technical s

Operating Voltage

9-24VDC

Operating Current

≤2000mA

Operating temperature

-20℃-70℃

Output Power

15W

Audio Format

MP3 (bit rate ≤ 192Kbps)

Communication Mode

Modbus RTU serial communication protocol

On-board Memory Size

8MB (by default)

Modbus RTU Serial Communication

This product supports Modbus RTU serial communication based on RS485, and the default baud rate is 9600. Because of its binary representation and compact data structure, Modbus RTU has high communication efficiency and it is widely used in industrial occasions.

Factory default settings:

Default RS485 addre: 01

Default volume level: 30(maximum)

Default baud rate: 9600

Communication Format

Data bits: 8; Stop bits: 1; Error : CRC (Cyclic Redundancy Check)

Addr

Fun

Data start

reg hi

Data start

reg lo

Data #of regs hi

Data #of regs lo

CRC16_L

CRC16_H

01

06

00

03

00

01

B8

0A

Addre code (1 byte), function code (1 byte), start addre (2 bytes), data (2 bytes), check code (2 bytes)

Addr: addre

Fun: function code

Data start reg hi: data start addre-register high byte

Data start reg lo: data start addre-register low byte

Data #of reg hi: number of data read-register high byte

Data #of reg lo: number of data read - register low byte

CRC16_H: Cyclic redundancy check high byte

CRC16_L: Cyclic redundancy checklow byte

Format: addre code + function code + register addre (upper 8 bits) + register addre (lower 8 bits) + data (upper

8bits) + data (lower 8bits) + check code (lower 8bits) + check code (upper 8bits)