40 lines
1.1 KiB
Markdown
40 lines
1.1 KiB
Markdown
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# I2S Analog Output Test
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This is a simple basic test for the ESP32 __analog output__ using I2S.
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We just send a generated sine wave and expect to hear a clean signal.
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Please note the log level should be set to Warning so that there is no disturbing output!
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Make sure that you do not use any noisy power supply!
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### Output Device: Earphones
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You can also use some simple earphones
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On the ESP32 the stereo output is on the Pins GPIO25 and GPIO26
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| Earphone| ESP32 | UNO R4 |
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| --------| -----------------|---------|
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| Left | GPIO25 | A0 |
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| Righ | GPIO25 | GND |
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| GND | GND | GND |
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### Output Device: Piezo Electric Element
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To test the output I am using a piezo electric element
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On the ESP32 the stereo output is on the Pins GPIO25 and GPIO26
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| PIEZO | ESP32 | UNO R4 |
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| --------| -----------------|---------|
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| + | GPIO25 | A0 |
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| - | GND | GND |
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