To read an audio file from an external memory module using ESP32 and play the audio file using MAX98357 module, you can follow these steps:
Connect ESP32 and MAX98357 module
First, the ESP32 and MAX98357 modules need to be connected. The connections vary depending on the specific module used, but most will require connecting the GNDs together and the output pins of the ESP32 to the input pins of the MAX98357. After making sure the connection is correct, you can proceed to the next step.
Connecting external memory modules
Next, an external memory module needs to be connected to the ESP32. This can be connected via SPI interface or SDIO interface. The connection of the SPI interface usually needs to connect the MISO, MOSI, SCK and CS pins. SDIO interface usually needs to connect CMD, CLK, D0-D3 and CD pins. The connection procedure may vary slightly depending on the memory module used. After making sure the connection is correct, you can proceed to the next step.
read audio file
Once connected, it's time to start reading audio files from the external memory module. The exact method depends on the type of file to be read and the type of memory block. For example, if you want to read WAV files, you can use the WAV reading library. If you want to read MP3 files, you can use MP3 decoding library.
play audio file
After reading the audio file, you can use the MAX98357 module to play the audio file. The specific method also depends on the type of file to be played and the type of MAX98357 module. For example, if you want to play WAV files, you can use the WAV playback library. If you want to play MP3 files, you can use MP3 decoding library.
In summary, to read an audio file from an external memory module using ESP32 and play an audio file using a MAX98357 module, one needs to connect the two devices and then select the appropriate library to read and play the desired audio file.