The SOMO-14D plays back sound files stored on a FAT16-formatted microSD card. The module supports 4-bit ADPCM audio files with sample rates from 6Khz up to 32Khz. By using the freely available software tool, any WAV or MP3 file can be easily converted to the ADPCM format which can then be can be saved to a micro-SD memory card.
The module can be controlled via simple serial commands over a UART interface, and can also optionally be simply controlled via digital button pins.
Audio can be output directly to a speaker (8 Ohm / 0.5 Watt) or sent to an external amplifier.
The module operates at 3.3V, and draws only 8uA at idle.
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