30 lines
882 B
Markdown
30 lines
882 B
Markdown
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# Stream PDM Input to CSV Output
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## General Description:
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To use a PDM microphone you need to have a microcontroller that supports PDM input or a dedicated library.
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The ESP32 supports PDM via the I2S API: We stream the sound input from a PDM microphone (PDM Digital MEMS MP34DT01) which we read in from the I2S interface and displays it on the Arduino Serial Plotter.
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## Pins
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| i2s-mic | ESP32
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| ---------| ---------------
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| 3V | 3V
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| GND | GND
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| SEL | GND (GND or 3.3V)
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| CLK | WS (GPIO15)
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| DAT | IN (GPIO32)
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| - | BCK (GPIO14)
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## Additional Comments
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You can select if you receive only data on the left or right by setting SEL to high or low.
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Please note that in the 2.x realease of the Arduino ESP core, the WS pin is used as CLK. Prior to this it was BCK
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