Quick Start Guide - Microplayer

This guide explains how to quickly start the MicroPlayer mkIII for first use.

TABLE DES MATIÈRES

• 1. Presentation
• 2. Preparing the Storage Media
• 3. Connecting Input Contacts
• 4. Connecting Output Contacts
• 5. First Startup
• 6. Firmware Update
• 7. Reference
  • 7.1 Folder and File Tags
  • 7.2 Configuration File
  • 7.3 RS-232 Serial Connection

1. Presentation

The MicroPlayer mkIII is a standalone audio player supporting WAV and MP3 files stored on an SD card or USB drive. Files can be played automatically at power-up or triggered by external events (input contacts, RS-232 commands, infrared remote control).

2. Preparing the Storage Media

Select a high-quality SD card or USB drive and format it as FAT32. Store the necessary files according to the organization required by the player (see the example below). Do not use special characters or accented letters.

• Files at the root of the storage media:
  • config.txt (optional): Player configuration file. See the Configuration File section.
  • serial.txt (optional): File defining the serial frames to send. See the RS-232 Serial Connection section.
• Folder organization at the root:
  • No subfolders allowed.
  • Naming: xxx[TAG1][TAG2]Name
    • xxx: Folder number from 000 to 999 used by commands. The AutoPlay function uses folder 000.
    • [TAGx] (optional): Tags controlling playback. See the Folder and File Tags section.
    • Name (optional): Folder name (free).
• Organization of audio files in folders:
  • Format: WAV or MP3
  • Naming: xxx[TAG1][TAG2]Name.ext
    • xxx: File number from 001 to 999 defining the playback order in sequential mode. Optional and unused in random mode.
    • [TAGx] (optional): Tags controlling playback.
    • Name (optional): File name (free).
    • ext: wav or mp3 extension.

3. Connecting Input Contacts

The player’s 4 input contacts are used to generate events. Trigger systems can be connected to them (e.g., push button, presence detector, relay, programmable controller, SensoPad, IRPad, etc.). They must behave like open or closed contacts between an input and the player’s ground, with activation occurring on a closed contact.

The activation states (0 for open or 1 for closed) of the input contacts are combined to form a binary code identifying the generated event:

Combination xxx = Input1 + Input2 × 2 + Input3 × 4 + Input4 × 8

A command is assigned to each event.

By default, the INPUTxxx event resulting from the combination value xxx of the inputs is associated with starting the playback of folder xxx.

The config.txt file allows you to modify the commands assigned to the first 15 combinations.

Up to 4 combinations (001, 002, 004, 008), trigger systems can be directly connected to the inputs. Beyond this, a diode-based circuit can be used to achieve up to 15 combinations (e.g., with the Ext15In card).

Example circuit: 15 push buttons to 4 inputs

4. Connecting Output Contacts

The MicroPlayer mkIII offers 2 outputs with MOSFET switches (up to 500 mA per output) to control power relays, motor controllers, lights, players, and various devices. The states of the 2 output contacts can be controlled using the folder and file tag [RLxy]. x and y represent the activation states of outputs 1 and 2:

Examples:

• 001[RL00]: Both output contacts open when playback of folder 001 starts.
• 002[RL10]: Output contact 1 closes during playback of folder 002, and output contact 2 opens when playback of folder 002 starts.
• SongA[RL21].mp3: Output contact 1 closes when playback of the MP3 file starts, and output contact 2 closes during playback of the MP3 file.

5. First Startup

1. Ensure the player is powered off (power adapter unplugged).
2. Connect the audio outputs to the audio system as needed.
3. Connect the input and output contacts as needed. See the Connecting Input Contacts and Connecting Output Contacts sections.
4. Connect the RS-232 serial link if needed.
5. Insert the prepared storage media. See the Preparing the Storage Media section.
6. Power on the player by plugging in the power adapter.
7. The player is operational.

6. Firmware Update

Start the player with a firmware file MPMK2.bin placed at the root of a FAT32-formatted SD card.

Firmware updates via USB drive are not supported.

7. Reference

7.1 Folder and File Tags

7.2 Configuration File

The configuration file config.txt is a plain text file placed at the root of the storage media. Each line allows you to define a player parameter according to the table below.

7.3 RS-232 Serial Connection

This link allows the player to receive commands, send arbitrary frames, and send status information.

By default, it is configured as follows (modifiable with config.txt):

The reception protocol is based on a 3-byte frame: “Status”, “Command”, and “Data”:

Arbitrary frames can be sent using the [RSxxx] tag and input contacts. These frames must be defined in the serial.txt file at the root of the storage media, in the format #xxx:tt tt tt..., with one definition per line (e.g., #002:98 75 21 35 45 B2).

The monitoring protocol is structured like the reception protocol. The status byte has the same meaning. This protocol sends the following command and data bytes, depending on the mode selected in the config.txt file.